OverviewAll product unitsProduct unitPassive ComponentsProduct groupEMC ComponentsProduct familySurge ProtectionProduct seriesWE-VS SMT Varistor

WE-VS SMT Varistor

WE-VS SMT Varistor. Fast response time. Nickel barrier for leadfree soldering.
Size Dimen­sions 3DL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
Mount
0402 0.96 0.48 0.5 0.25 SMT
0603 1.6 0.8 0.8 0.3 SMT
0805 2 1.25 0.9 0.3 SMT
1206 3.2 1.6 1.7 0.5 SMT

Characteristics

  • Fast response time
  • Low leakage current
  • Nickel barrier for leadfree soldering
  • Operating temperature: –40 ºC to +85 ºC

Applications

  • Protection of DC distribution
  • Protection of power supply
  • Protection of bus systems and communication lines
  • Limiting of overvoltages
  • Protection of semiconductors
  • Surge protection in accordance with EN 61000-4-5
  • ESD protection in accordance with EN 61000-4-2

Products

All
0402
0603
0805
1206
Order Code Data­sheet Simu­lation Downloads StatusVRMS
(V)
VDC
(V)
VBR min.
(V)
IPeak
(A)
Wmax
(J)
VClamp
(V)
Test Condition VClampApplicationDesign Kit Samples
82536259SPEC
7 files Active i| Production is active. Expected lifetime: >10 years. 2.5 3.3 5.5 30 0.1 13 1.0 A @ 8/20 µs 3 VDC
82537040SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 4 5.5 8 20 0.04 21 1.0 A @ 8/20 µs 5 VDC825998
82536040SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 4 5.5 8 30 0.1 21 1.0 A @ 8/20 µs 5 VDC825998
82550040SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 4 5.5 8 80 0.1 16 1.0 A @ 8/20 µs 5 VDC825998
82531040SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 4 5.5 8 150 0.4 19 1.0 A @ 8/20 µs 5 VDC825998
82557060SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 6 9 12 20 0.05 20 1.0 A @ 8/20 µs
82556060SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 6 9 12 30 0.1 20 1.0 A @ 8/20 µs
82550060SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 6 9 12 80 0.1 20 1.0 A @ 8/20 µs825998
82537070SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 7 9 12.5 20 0.05 30 1.0 A @ 8/20 µs
82536070SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 7 9 13.5 30 0.1 30 1.0 A @ 8/20 µs825998
82550080SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 8 11 15 100 0.1 25 1.0 A @ 8/20 µs825998
82537110SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 11 14 18 10 0.02 38 1.0 A @ 8/20 µs 12 VDC825998
82536110SPEC
7 files Active i| Production is active. Expected lifetime: >10 years. 11 14 18 30 0.1 38 1.0 A @ 8/20 µs 12 VDC825998
82550110SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 11 14 18 100 0.1 30 1.0 A @ 8/20 µs 12 VDC825998
82541110SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 11 14 18 200 0.5 35 1.0 A @ 8/20 µs 12 VDC825998
82557140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 14 18 24 20 0.05 40 1.0 A @ 8/20 µs 12/15 VDC825998
82556140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 14 18 24 30 0.1 40 1.0 A @ 8/20 µs 12/15 VDC
82536140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 14 18 25 30 0.1 45 1.0 A @ 8/20 µs 12/15 VDC825998
82550140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 14 18 24 100 0.2 40 1.0 A @ 8/20 µs 12/15 VDC825998
82551140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 14 18 24 100 0.3 38 1.0 A @ 8/20 µs 12/15 VDC
82531140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 14 18 22 150 0.4 35 1.0 A @ 8/20 µs 12/15 VDC825998
82541140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 14 18 24 200 0.5 45 1.0 A @ 8/20 µs 12/15 VDC
82556170SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 17 22 27 30 0.1 45 1.0 A @ 8/20 µs
82551170SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 17 22 27 100 0.4 45 1.0 A @ 8/20 µs
82556200SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 20 26 33 30 0.1 54 1.0 A @ 8/20 µs 24 VDC825998
82550200SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 20 26 33 100 0.3 54 1.0 A @ 8/20 µs 24 VDC825998
82551200SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 20 26 33 100 0.5 54 1.0 A @ 8/20 µs 24 VDC825998
82541200SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

6 files Active i| Production is active. Expected lifetime: >10 years. 20 26 33 200 0.7 60 1.0 A @ 8/20 µs 24 VDC
82556250SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 25 30 39 30 0.1 65 1.0 A @ 8/20 µs 24 VDC
82550250SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 25 30 39 100 0.3 65 1.0 A @ 8/20 µs 24 VDC825998
82551250SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 25 30 39 100 0.6 65 1.0 A @ 8/20 µs 24 VDC
82541250SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 25 30 200 1 72 1.0 A @ 8/20 µs 24 VDC825998
82556300SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 30 38 47 30 0.1 77 1.0 A @ 8/20 µs825998
82550300SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 30 38 47 100 0.3 77 1.0 A @ 8/20 µs825998
82551300SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 30 38 47 100 0.7 77 1.0 A @ 8/20 µs
82541300SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 30 38 47 200 1.1 85 1.0 A @ 8/20 µs825998
82550350SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 35 45 56 80 0.3 90 1.0 A @ 8/20 µs825998
82541350SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 35 45 56 200 0.8 90 1.0 A @ 8/20 µs825998
82531400SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 40 56 70 200 1 120 1.0 A @ 8/20 µs 48 VDC825998
82551500SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 50 65 82 100 0.5 135 1.0 A @ 8/20 µs
82551600SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years. 60 85 100 100 0.6 165 1.0 A @ 8/20 µs825998
Order Code Data­sheet Simu­lation
82536259SPEC
82537040SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82536040SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82550040SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82531040SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82557060SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82556060SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82550060SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82537070SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82536070SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82550080SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82537110SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82536110SPEC
82550110SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82541110SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82557140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82556140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82536140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82550140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82551140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82531140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82541140SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82556170SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82551170SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82556200SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82550200SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82551200SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82541200SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82556250SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82550250SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82551250SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82541250SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82556300SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82550300SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82551300SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82541300SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82550350SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82541350SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82531400SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82551500SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

82551600SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Samples
Order Code Data­sheet Simu­lation Downloads StatusVRMS
(V)
VDC
(V)
VBR min.
(V)
IPeak
(A)
Wmax
(J)
VClamp
(V)
Test Condition VClampApplicationDesign Kit Samples

Assortments

Articles from this product series can be found in the following assortments:

Comments

  • Varistors do not have an endless lifetime. Also a well dimensioned varistor may fail due to enormous overload. This will result in heating, smoke emission and/or displosion of varistor itself. Therefore we recommend to place varistors separate within a box on PCB.Furthermore a fuse should be used in the varistor’s current path, which trips when varistor is destroyed. This fuse avoids secondary currents and therewith caused damages.

Videos

Würth Elektronik Webinar: Effective ESD protection with TVS diodes