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 up to 100 W (IEEE 802.3bt).

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 

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Pulse Transformers

ObrazManufacturer Part NumberOpisDostępna ilość CenaWyświetl szczegóły
XFRMR 1:1 350UH SUPER TINY SMD74930000XFRMR 1:1 350UH SUPER TINY SMD0 - Immediate$4.57Wyświetl szczegóły
XFRMR PULSE 1:1 120UH SMD74930100XFRMR PULSE 1:1 120UH SMD0 - Immediate$5.54Wyświetl szczegóły
WE-STST SMT SUPER TINY SIGNAL TR74930030WE-STST SMT SUPER TINY SIGNAL TR0 - Immediate$7.71Wyświetl szczegóły
TRANSFORMER LAN 10/100 POE SMD749013011TRANSFORMER LAN 10/100 POE SMD2078 - Immediate$8.75Wyświetl szczegóły
TRANS WE-LAN 10/100 POE SMD749013011ATRANS WE-LAN 10/100 POE SMD6833 - Immediate$14.04Wyświetl szczegóły
TRANSFORMER LAN 10/100 SMD7490100111ATRANSFORMER LAN 10/100 SMD5032 - Immediate$14.25Wyświetl szczegóły
WE-LAN 10/100/1000 BASE-T SMT TR749020111AWE-LAN 10/100/1000 BASE-T SMT TR9591 - Immediate$14.14Wyświetl szczegóły
PULSE XFMR 1:1 300UH749010310PULSE XFMR 1:1 300UH0 - Immediate$19.29Wyświetl szczegóły
10/100 BASE-T SMD TRANSFORMER 1749012011010/100 BASE-T SMD TRANSFORMER 1802 - Immediate$18.29Wyświetl szczegóły
XFRMR LAN 1000 BASE-T 1:1 350UH749020023AXFRMR LAN 1000 BASE-T 1:1 350UH500 - Immediate$21.32Wyświetl szczegóły

Modular Connector Jacks With Magnetics

ObrazManufacturer Part NumberOpisDostępna ilość CenaWyświetl szczegóły
CONN JACK 1PORT PCB74990101212CONN JACK 1PORT PCB2141 - Immediate$21.71Wyświetl szczegóły
CONN JACK 1PORT PCB7499010121ACONN JACK 1PORT PCB820 - Immediate$22.04Wyświetl szczegóły
CONN JACK 1PORT PCB7499011121ACONN JACK 1PORT PCB318 - Immediate$23.93Wyświetl szczegóły
CONN JACK 1PORT SURFACE MOUNT7498011122CONN JACK 1PORT SURFACE MOUNT85 - Immediate$25.89Wyświetl szczegóły
CONN JACK 1PORT PCB74984104400CONN JACK 1PORT PCB5 - Immediate$26.21Wyświetl szczegóły
CONN JACK 1PORT PCB74990101210CONN JACK 1PORT PCB0 - Immediate$26.82Wyświetl szczegóły
CONN JACK 1PORT PCB7499011222ACONN JACK 1PORT PCB90 - Immediate$28.14Wyświetl szczegóły
CONN JACK 1PORT SURFACE MOUNT74980111211CONN JACK 1PORT SURFACE MOUNT2269 - Immediate$28.57Wyświetl szczegóły
CONN JACK 1PORT PCB74981104400CONN JACK 1PORT PCB109 - Immediate$28.96Wyświetl szczegóły
CONN JACK 1PORT PCB74981104402CONN JACK 1PORT PCB333 - Immediate$29.14Wyświetl szczegóły

Modular Jacks

ObrazManufacturer Part NumberOpisDostępna ilość CenaWyświetl szczegóły
CONN MOD JACK 6P6C VERT UNSHLD615006138521CONN MOD JACK 6P6C VERT UNSHLD2481 - Immediate$2.61Wyświetl szczegóły
CONN MOD JACK 8P8C R/A SHIELDED615008140621CONN MOD JACK 8P8C R/A SHIELDED0 - Immediate$8.86Wyświetl szczegóły
CONN MOD JACK 8P8C VERT SHIELDED615008138221CONN MOD JACK 8P8C VERT SHIELDED3869 - Immediate$8.86Wyświetl szczegóły
CONN MOD JACK 8P8C VERT SHIELDED615008140421CONN MOD JACK 8P8C VERT SHIELDED2712 - Immediate$9.36Wyświetl szczegóły
CONN MOD JACK 8P8C R/A SHIELDED615008137421CONN MOD JACK 8P8C R/A SHIELDED3043 - Immediate$9.36Wyświetl szczegóły
CONN MOD JACK 8P8C ANGLED SHLD615008145121CONN MOD JACK 8P8C ANGLED SHLD592 - Immediate$11.75Wyświetl szczegóły
CONN MOD JACK 8P8C ANGLED SHLD615008145221CONN MOD JACK 8P8C ANGLED SHLD363 - Immediate$14.54Wyświetl szczegóły
MODULAR COMM JACK DUAL 8P8C615016137721MODULAR COMM JACK DUAL 8P8C314 - Immediate$15.71Wyświetl szczegóły
CONN MOD JACK 8P8C VERT SHIELDED615008138321CONN MOD JACK 8P8C VERT SHIELDED944 - Immediate$16.75Wyświetl szczegóły
CONN MOD JACK 8P8C VERT UNSHLD615008144221CONN MOD JACK 8P8C VERT UNSHLD0 - Immediate$4.07Wyświetl szczegóły
CONN MOD JACK 4P4C R/A UNSHLD615004143821CONN MOD JACK 4P4C R/A UNSHLD342 - Immediate$4.25Wyświetl szczegóły
CONN MOD JACK 6P6C R/A SHIELDED615006141121CONN MOD JACK 6P6C R/A SHIELDED0 - Immediate$4.25Wyświetl szczegóły
CONN MOD JACK 8P8C VERT UNSHLD615008138021CONN MOD JACK 8P8C VERT UNSHLD2508 - Immediate$6.25Wyświetl szczegóły
WR-MJ_MODULAR JACKS_MID-MOUNT_SM634108150321WR-MJ_MODULAR JACKS_MID-MOUNT_SM515 - Immediate$11.82Wyświetl szczegóły
WR-MJ_MODULAR JACKS_MID-MOUNT_TH615108150221RWR-MJ_MODULAR JACKS_MID-MOUNT_TH7 - Immediate$13.89Wyświetl szczegóły
CONN MOD JACK 8P8C R/A SHIELDED634008137521CONN MOD JACK 8P8C R/A SHIELDED692 - Immediate$10.96Wyświetl szczegóły
CONN MOD JACK 8P8C R/A SHIELDED61500814221CONN MOD JACK 8P8C R/A SHIELDED0 - Immediate$8.32Wyświetl szczegóły
CONN MOD JACK 8P8C R/A SHIELDED615008142621CONN MOD JACK 8P8C R/A SHIELDED1279 - Immediate$8.93Wyświetl szczegóły
CONN MOD JACK 8P8C R/A SHIELDED615016137621CONN MOD JACK 8P8C R/A SHIELDED522 - Immediate$13.54Wyświetl szczegóły
CONN MOD JACK 8P8C R/A SHIELDED634008149821CONN MOD JACK 8P8C R/A SHIELDED437 - Immediate$29.36Wyświetl szczegóły
Updated: 2025-11-11
Published: 2023-05-22

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