Würth Elektronik

LAN Transformers and Modular Jack Connectors

Würth Elektronik's LAN transformers offer multiple Ethernet solutions

Image of Würth Elektronik's LAN Transformers and Modular Jack ConnectorsWürth Elektronik's WE-LAN transformers are designed with at least one transformer and one common mode choke in each channel. The LAN transformer portfolio consists of the WE-LAN series with Power over Ethernet (PoE) up to 150 W and speeds up to 1 Gbit/s. The WE-LAN 10 G transformers with 10GBase-T and PoE+ over four pairs up to 150 W. The WE-LAN AQ transformers are manufactured by a fully automated process with Ethernet speeds up to 1 Gbit/s.

Würth Elektronik's WR-MJ modular jacks offer a broad range of connector types that comply with Ethernet and other communications standards. Modular jack connectors are the connector of choice for local data communication. The WR-MJ connectors are available in multiple versions, ranging from plastic to shielded options in vertical, horizontal, 45 degree, and 47.5 degree orientations. The jack design is in accordance with FCC regulation and compatible with IEEE standards IEEE 802.3u, 802.3z (8P8C RJ45) and PoE-compatible according to IEEE 802.3af, 802.3at (8P8C RJ45).

Würth Elektronik also offers the WE-RJ45 LAN transformers built with an RJ45 connector with integrated transformer/common mode choke available in multiple configurations, THT and SMT, and with or without LEDs. The WE-RJ45 LAN features PoE up to 50 W and speeds up to 10 Gbit/s.

Application Notes
LAN Transformer Features
  • Compliant with IEEE 802.3 standards: 802.3af, 802.3u, 802.3ab, 802.3at, 802.3bt, 802.3an
  • SMT
  • Inductance of 120 µH up to 350 µH
  • 1:1 ±2% turns ratio
  • -1.1 dB typ. insertion loss at 1 MHz to 100 MHz
  • -38 dB typ. crosstalk at 1MHz to 100MHz
  • -38 dB typ. differential to common-mode rejection at 1 MHz to 100 MHz
  • Return loss:
    • -18 dB min. 30 MHz
    • -14 dB min. 60 MHz
    • -12 dB min. 80 MHz
    • -10 dB min. 100 MHz
WR-MJ Modular Jack Connector Features
  • Jack design in accordance with FCC regulation
    • Mates all FCC plugs
  • 4P4C, 6P2C, 6P4C and 8P8C configurations
  • Stacking up to 2 x 6
  • Ethernet, Cat 3, Cat 5, Cat 6, and Cat 6a
  • Discreet solution for Ethernet protocol (8P8C RJ45)
    • Smaller footprint
    • High flexibility in PCB design
    • THR compatibility
    • Potentially better crosstalk performances
WE-RJ45 LAN Features
  • RJ45 connector with integrated transformer/common mode choke
  • PoE up to 50 W and speeds up to 10 Gbit/s
  • Available in SMT and THT 
  • Compliant with standards: IEEE 802.3u, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3at, and IEE 802.3bt
  • Improved common mode rejection (CMRR) due to additional NiZn cores 

Pulse Transformers

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
XFRMR 1:1 350UH SUPER TINY SMD74930000XFRMR 1:1 350UH SUPER TINY SMD11482 - Immediate$10.51View Details
XFRMR PULSE 1:1 120UH SMD74930100XFRMR PULSE 1:1 120UH SMD0 - Immediate$12.73View Details
WE-STST SMT SUPER TINY SIGNAL TR74930030WE-STST SMT SUPER TINY SIGNAL TR408 - Immediate$17.74View Details
TRANSFORMER LAN 10/100 POE SMD749013011TRANSFORMER LAN 10/100 POE SMD5664 - Immediate$20.12View Details
TRANS WE-LAN 10/100 POE SMD749013011ATRANS WE-LAN 10/100 POE SMD7729 - Immediate$32.27View Details
TRANSFORMER LAN 10/100 SMD7490100111ATRANSFORMER LAN 10/100 SMD5240 - Immediate$32.76View Details
WE-LAN 10/100/1000 BASE-T SMT TR749020111AWE-LAN 10/100/1000 BASE-T SMT TR8359 - Immediate$32.52View Details
PULSE XFMR 1:1 300UH749010310PULSE XFMR 1:1 300UH1739 - Immediate$44.34View Details
10/100 BASE-T SMD TRANSFORMER 1749012011010/100 BASE-T SMD TRANSFORMER 14521 - Immediate$42.04View Details
XFRMR LAN 1000 BASE-T 1:1 350UH749020023AXFRMR LAN 1000 BASE-T 1:1 350UH13161 - Immediate$49.02View Details

Modular Connector Jacks With Magnetics

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
CONN JACK 1PORT PCB74990101212CONN JACK 1PORT PCB2487 - Immediate$48.86View Details
CONN JACK 1PORT PCB7499010121ACONN JACK 1PORT PCB3121 - Immediate$49.59View Details
CONN JACK 1PORT PCB7499011121ACONN JACK 1PORT PCB1367 - Immediate$53.78View Details
CONN JACK 1PORT SURFACE MOUNT7498011122CONN JACK 1PORT SURFACE MOUNT192 - Immediate$58.22View Details
CONN JACK 1PORT PCB74984104400CONN JACK 1PORT PCB1030 - Immediate$60.27View Details
CONN JACK 1PORT PCB74990101210CONN JACK 1PORT PCB6407 - Immediate$60.35View Details
CONN JACK 1PORT PCB7499011222ACONN JACK 1PORT PCB807 - Immediate$63.31View Details
CONN JACK 1PORT SURFACE MOUNT74980111211CONN JACK 1PORT SURFACE MOUNT1350 - Immediate$65.69View Details
CONN JACK 1PORT PCB74981104400CONN JACK 1PORT PCB668 - Immediate$66.59View Details
CONN JACK 1PORT PCB74981104402CONN JACK 1PORT PCB1143 - Immediate$67.00View Details

Modular Jacks

ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
CONN MOD JACK 6P6C VERT UNSHLD615006138521CONN MOD JACK 6P6C VERT UNSHLD4749 - Immediate$5.83View Details
CONN MOD JACK 8P8C R/A SHIELDED615008140621CONN MOD JACK 8P8C R/A SHIELDED1411 - Immediate$19.87View Details
CONN MOD JACK 8P8C VERT SHIELDED615008138221CONN MOD JACK 8P8C VERT SHIELDED1734 - Immediate$19.87View Details
CONN MOD JACK 8P8C VERT SHIELDED615008140421CONN MOD JACK 8P8C VERT SHIELDED3428 - Immediate$21.10View Details
CONN MOD JACK 8P8C R/A SHIELDED615008137421CONN MOD JACK 8P8C R/A SHIELDED1938 - Immediate$21.10View Details
CONN MOD JACK 8P8C ANGLED SHLD615008145121CONN MOD JACK 8P8C ANGLED SHLD1275 - Immediate$26.36View Details
CONN MOD JACK 8P8C ANGLED SHLD615008145221CONN MOD JACK 8P8C ANGLED SHLD803 - Immediate$32.68View Details
MODULAR COMM JACK DUAL 8P8C615016137721MODULAR COMM JACK DUAL 8P8C1207 - Immediate$35.39View Details
CONN MOD JACK 8P8C VERT SHIELDED615008138321CONN MOD JACK 8P8C VERT SHIELDED3119 - Immediate$37.69View Details
CONN MOD JACK 8P8C VERT UNSHLD615008144221CONN MOD JACK 8P8C VERT UNSHLD1408 - Immediate$9.20View Details
CONN MOD JACK 4P4C R/A UNSHLD615004143821CONN MOD JACK 4P4C R/A UNSHLD982 - Immediate$9.52View Details
CONN MOD JACK 6P6C R/A SHIELDED615006141121CONN MOD JACK 6P6C R/A SHIELDED203 - Immediate$9.52View Details
CONN MOD JACK 8P8C VERT UNSHLD615008138021CONN MOD JACK 8P8C VERT UNSHLD3397 - Immediate$14.04View Details
WR-MJ_MODULAR JACKS_MID-MOUNT_SM634108150321WR-MJ_MODULAR JACKS_MID-MOUNT_SM749 - Immediate$27.18View Details
WR-MJ_MODULAR JACKS_MID-MOUNT_TH615108150221RWR-MJ_MODULAR JACKS_MID-MOUNT_TH547 - Immediate$31.94View Details
CONN MOD JACK 8P8C R/A SHIELDED634008137521CONN MOD JACK 8P8C R/A SHIELDED1142 - Immediate$25.21View Details
CONN MOD JACK 8P8C R/A SHIELDED61500814221CONN MOD JACK 8P8C R/A SHIELDED1414 - Immediate$18.72View Details
CONN MOD JACK 8P8C R/A SHIELDED615008142621CONN MOD JACK 8P8C R/A SHIELDED1167 - Immediate$20.12View Details
CONN MOD JACK 8P8C R/A SHIELDED615016137621CONN MOD JACK 8P8C R/A SHIELDED332 - Immediate$30.38View Details
CONN MOD JACK 8P8C R/A SHIELDED634008149821CONN MOD JACK 8P8C R/A SHIELDED944 - Immediate$67.49View Details
Published: 2023-05-22

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