OverviewAll product unitsProduct unitPassive ComponentsProduct groupSignal & CommunicationsProduct familyFiltered ConnectorsProduct seriesWE-RJ45 10G Transformer

WE-RJ45 10G Transformer

WE-RJ45 10G Transformer

Characteristics

  • RJ45 connector with integrated transformer & common mode choke
  • 10G Base-T
  • PoE(+) over 4 pairs
  • Compliant with IEEE standards: 802.3af, 802.3at, 802.3an and 802.3bt
  • Suitable for industrial temperatures: -40°C up to +85°C

Applications

  • Office and factory access points
  • Gateways
  • Servers
  • High-speed routers and switches
  • HDBaseT applications

Products

Order Code Data­sheet Simu­lation Downloads StatusData ratePoEPortsTabImproved CMRROperating TemperatureLEDPHY Chip ModeMountUSBShield TabsDesign Kit Samples
7499611421SPEC
6 files Active i| Production is active. Expected lifetime: >10 years. 10GBASE-T non-PoE 1 Up No 0 °C up to +70 °C yellow/green-green current & voltage THT No Yes749945
7499611420SPEC
6 files Active i| Production is active. Expected lifetime: >10 years. 10GBASE-T non-PoE 1 Up No -40 °C up to +85 °C yellow/green-green current & voltage THT No Yes
7499711421SPEC
6 files Active i| Production is active. Expected lifetime: >10 years. 10GBASE-T PoE 1 Up No -40 °C up to +85 °C yellow/green-green current & voltage THT No Yes
7499811420SPEC
6 files Active i| Production is active. Expected lifetime: >10 years. 10GBASE-T PoE+ 1 Up No -40 °C up to +85 °C yellow/green-green current & voltage THT No Yes
7499611422SPEC
6 files Active i| Production is active. Expected lifetime: >10 years. 10GBASE-T non-PoE 1 Down No -40 °C up to +85 °C yellow/green-green current & voltage THT No Yes
7499611423SPEC
6 files Active i| Production is active. Expected lifetime: >10 years. 10GBASE-T non-PoE 1 Down No -40 °C up to +85 °C yellow/green-green current & voltage THT No Yes
7499611424SPEC
6 files Active i| Production is active. Expected lifetime: >10 years. 10GBASE-T non-PoE 1 Up No -40 °C up to +85 °C yellow/green-green current & voltage THT No Yes
7499811120SPEC
6 files Active i| Production is active. Expected lifetime: >10 years. 10GBASE-T 4PPoE 1 Down No -40 °C up to +85 °C yellow-green current & voltage THT No Yes
Order Code Data­sheet Simu­lation
7499611421SPEC
7499611420SPEC
7499711421SPEC
7499811420SPEC
7499611422SPEC
7499611423SPEC
7499611424SPEC
7499811120SPEC
Samples
Order Code Data­sheet Simu­lation Downloads StatusData ratePoEPortsTabImproved CMRROperating TemperatureLEDPHY Chip ModeMountUSBShield TabsDesign Kit Samples

WE-RJ45 LAN

The RJ45 connector with magnetics can be quickly and easily implemented in an ethernet interface, with the integrated transformer and filter design ensuring compliance to IEEE 802.3 and IEC 62368-1 (old: IEC 60950-1) standards. For valuable board space savings, the design is 50% more compact than a discrete magnetics solution.

The filter design consists of a transformer, at least one common mode choke per channel and Bob Smith termination. Components with additional common mode chokes are available for even better common mode rejection.

Still questions about the application?

Which socket is suitable for current/voltage controlled PHYs?

The data sheet of the PHY indicates whether it is current or voltage controlled, which is an important criterion for selecting the transformer jack.

For a voltage controlled PHY, the LAN transformer is wired directly to the terminals of the PHY chip. The current mode PHY has a VDDA pin for power supply, the voltage mode PHY has no VDDA pin. Therefore the current in current mode PHYs flows via the LAN transformer pins.

Looking for the right jack for your interface? With REDEXPERT, our precise simulation platform, you can find it quickly and easily.

What has to be considered with PoE (Power over Ethernet)?

In addition to data transmission, PoE also realizes the power supply via the Ethernet interface, which means that no additional power supply cable is required. According to the IEEE 802.3 standard, the energy supplier is called Power Source Equipment (PSE) and the consumer Powered Device (PD).

To avoid incorrect polarity (reverse polarity) on the part of the PD, a diode bridge is necessary. Würth Elektronik offers components that already contain this (left) or that have connections that enable an external connection (right).

REDEXPERT allows to filter the RJ45 LAN jacks with magnetics according to the application on the side of the PD or the PD and the PSE.

How to connect RJ45 to the PHY-Chip?

1 WE-RJ45 LAN Connector with Magnetics: This is a ready-made module in which the Ethernet jack, the transformer and the Bob Smith termination are integrated. This provides the safety-relevant galvanic isolation as well as impedance matching and protects against transient interference and common mode noise.

2 Shield connection: For plastic housings, the capacitors are used to connect the Ethernet jack shield and thus the cable shield to the board ground (GND). For metal housings, it is recommended not to assemble the capacitors, but to connect the GND directly to the housing via screw connection.

3 Controller: Two TVS diode arrays are used to limit the interface-side transient noise to the PHY against GND. An EEPROM is connected to the controller for the on-board software and the signal section is clocked with a 25 MHz crystal.

More information about the circuit design and layout can be found in our reference design Gigabit-Ethernet Front-End.

What does a standard Ethernet interface look like?

1. Bob Smith Termination: To reduce common mode current and susceptibility to interference from unused wire pairs on the RJ45 connector

2. Common Mode Chokes: Improve EMC by attenuating common-mode interference

3. Signal Transformer: Provides galvanic isolation between PHY chip and RJ45 jack, protects against transients, and matches the impedance to the internal logic and to balanced wire pairs

4. MLCC Capacitors: Contribute to common mode rejection by RF-connecting the center taps of the transformers to ground (GND)

5. TVS-Dioden-Array: Limits interface transients to the PHY against GND.

Part 1, 2, 3 and 4 are already integrated in the WE-RJ45 LAN connector with magnetics. More information on the Ethernet interface can be found in our Application Guide.

PoE Power classes according to IEEE 802.3
*) for powers above 30 W, there were/are several suppliers that came onto the market with different implementations and names (UPoE, 4PPoE, PoE++, ...). These are not compatible with each other. Only with 802.3bt is there a general standard again with Hi-PoE (High Power PoE).
*) for powers above 30 W, there were/are several suppliers that came onto the market with different implementations and names (UPoE, 4PPoE, PoE++, ...). These are not compatible with each other. Only with 802.3bt is there a general standard again with Hi-PoE (High Power PoE).

Assortments

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