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 

Pulse Transformers

KépGyártói cikkszámLeírásAvailable QuantityÁrRészletek megtekintése
XFRMR 1:1 350UH SUPER TINY SMD74930000XFRMR 1:1 350UH SUPER TINY SMD5834 - Immediate$429.12Részletek megtekintése
XFRMR PULSE 1:1 120UH SMD74930100XFRMR PULSE 1:1 120UH SMD0 - Immediate$519.64Részletek megtekintése
WE-STST SMT SUPER TINY SIGNAL TR74930030WE-STST SMT SUPER TINY SIGNAL TR3971 - Immediate$724.14Részletek megtekintése
TRANSFORMER LAN 10/100 POE SMD749013011TRANSFORMER LAN 10/100 POE SMD5386 - Immediate$821.36Részletek megtekintése
TRANS WE-LAN 10/100 POE SMD749013011ATRANS WE-LAN 10/100 POE SMD11333 - Immediate$1,317.53Részletek megtekintése
TRANSFORMER LAN 10/100 SMD7490100111ATRANSFORMER LAN 10/100 SMD6601 - Immediate$1,337.65Részletek megtekintése
WE-LAN 10/100/1000 BASE-T SMT TR749020111AWE-LAN 10/100/1000 BASE-T SMT TR12189 - Immediate$1,327.59Részletek megtekintése
PULSE XFMR 1:1 300UH749010310PULSE XFMR 1:1 300UH923 - Immediate$1,810.35Részletek megtekintése
10/100 BASE-T SMD TRANSFORMER 1749012011010/100 BASE-T SMD TRANSFORMER 13866 - Immediate$1,716.48Részletek megtekintése
XFRMR LAN 1000 BASE-T 1:1 350UH749020023AXFRMR LAN 1000 BASE-T 1:1 350UH9965 - Immediate$2,001.44Részletek megtekintése

Modular Connector Jacks With Magnetics

KépGyártói cikkszámLeírásAvailable QuantityÁrRészletek megtekintése
CONN JACK 1PORT PCB74990101212CONN JACK 1PORT PCB2435 - Immediate$1,994.74Részletek megtekintése
CONN JACK 1PORT PCB7499010121ACONN JACK 1PORT PCB2764 - Immediate$2,024.91Részletek megtekintése
CONN JACK 1PORT PCB7499011121ACONN JACK 1PORT PCB834 - Immediate$2,195.89Részletek megtekintése
CONN JACK 1PORT SURFACE MOUNT7498011122CONN JACK 1PORT SURFACE MOUNT138 - Immediate$2,376.92Részletek megtekintése
CONN JACK 1PORT PCB74984104400CONN JACK 1PORT PCB722 - Immediate$2,460.74Részletek megtekintése
CONN JACK 1PORT PCB74990101210CONN JACK 1PORT PCB5411 - Immediate$2,464.09Részletek megtekintése
CONN JACK 1PORT PCB7499011222ACONN JACK 1PORT PCB644 - Immediate$2,584.78Részletek megtekintése
CONN JACK 1PORT SURFACE MOUNT74980111211CONN JACK 1PORT SURFACE MOUNT1346 - Immediate$2,682.00Részletek megtekintése
CONN JACK 1PORT PCB74981104400CONN JACK 1PORT PCB487 - Immediate$2,718.88Részletek megtekintése
CONN JACK 1PORT PCB74981104402CONN JACK 1PORT PCB522 - Immediate$2,735.64Részletek megtekintése

Modular Jacks

KépGyártói cikkszámLeírásAvailable QuantityÁrRészletek megtekintése
CONN MOD JACK 6P6C VERT UNSHLD615006138521CONN MOD JACK 6P6C VERT UNSHLD4620 - Immediate$238.03Részletek megtekintése
CONN MOD JACK 8P8C R/A SHIELDED615008140621CONN MOD JACK 8P8C R/A SHIELDED1229 - Immediate$811.31Részletek megtekintése
CONN MOD JACK 8P8C VERT SHIELDED615008138221CONN MOD JACK 8P8C VERT SHIELDED4307 - Immediate$811.31Részletek megtekintése
CONN MOD JACK 8P8C VERT SHIELDED615008140421CONN MOD JACK 8P8C VERT SHIELDED2395 - Immediate$861.59Részletek megtekintése
CONN MOD JACK 8P8C R/A SHIELDED615008137421CONN MOD JACK 8P8C R/A SHIELDED3005 - Immediate$861.59Részletek megtekintése
CONN MOD JACK 8P8C ANGLED SHLD615008145121CONN MOD JACK 8P8C ANGLED SHLD603 - Immediate$1,076.15Részletek megtekintése
CONN MOD JACK 8P8C ANGLED SHLD615008145221CONN MOD JACK 8P8C ANGLED SHLD785 - Immediate$1,334.30Részletek megtekintése
MODULAR COMM JACK DUAL 8P8C615016137721MODULAR COMM JACK DUAL 8P8C3 - Immediate$1,444.93Részletek megtekintése
CONN MOD JACK 8P8C VERT SHIELDED615008138321CONN MOD JACK 8P8C VERT SHIELDED2672 - Immediate$1,538.80Részletek megtekintése
CONN MOD JACK 8P8C VERT UNSHLD615008144221CONN MOD JACK 8P8C VERT UNSHLD1367 - Immediate$375.48Részletek megtekintése
CONN MOD JACK 4P4C R/A UNSHLD615004143821CONN MOD JACK 4P4C R/A UNSHLD718 - Immediate$388.89Részletek megtekintése
CONN MOD JACK 6P6C R/A SHIELDED615006141121CONN MOD JACK 6P6C R/A SHIELDED1078 - Immediate$388.89Részletek megtekintése
CONN MOD JACK 8P8C VERT UNSHLD615008138021CONN MOD JACK 8P8C VERT UNSHLD829 - Immediate$573.28Részletek megtekintése
WR-MJ_MODULAR JACKS_MID-MOUNT_SM634108150321WR-MJ_MODULAR JACKS_MID-MOUNT_SM710 - Immediate$1,109.68Részletek megtekintése
WR-MJ_MODULAR JACKS_MID-MOUNT_TH615108150221RWR-MJ_MODULAR JACKS_MID-MOUNT_TH457 - Immediate$1,304.12Részletek megtekintése
CONN MOD JACK 8P8C R/A SHIELDED634008137521CONN MOD JACK 8P8C R/A SHIELDED918 - Immediate$1,029.22Részletek megtekintése
CONN MOD JACK 8P8C R/A SHIELDED61500814221CONN MOD JACK 8P8C R/A SHIELDED2160 - Immediate$764.37Részletek megtekintése
CONN MOD JACK 8P8C R/A SHIELDED615008142621CONN MOD JACK 8P8C R/A SHIELDED1104 - Immediate$821.36Részletek megtekintése
CONN MOD JACK 8P8C R/A SHIELDED615016137621CONN MOD JACK 8P8C R/A SHIELDED696 - Immediate$1,240.43Részletek megtekintése
CONN MOD JACK 8P8C R/A SHIELDED634008149821CONN MOD JACK 8P8C R/A SHIELDED1429 - Immediate$2,755.76Részletek megtekintése
Updated: 2025-11-11
Published: 2023-05-22

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