Shenzhen GLGNET Electronics Co., LTD

Shenzhen GLGNET Electronics Co., LTD

20 Years Experience In Magneitc RJ45 Connector and SFP / QSFP Cage

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Ethernet LAN Isolation Transformer

China Shenzhen GLGNET Electronics Co., LTD certification
China Shenzhen GLGNET Electronics Co., LTD certification
We have cooperated with GLGNET many years, mainly buy Magnetic RJ45 Modular Jack from GLGNET. we like their fast response, strong R&D support, good quality and quick delivery, they are one of our most competent partner!

—— From ZTE Partner

Integrity▪Responsibility▪Concentration -- We like the faith from GLGENT; They concern much about quality, provide strong R&D support and comfortable sales service; We're very happy to cooperate with GLGNET!

—— From Huawai Partner

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Ethernet LAN Isolation Transformer

Ethernet LAN Isolation Transformer
Ethernet LAN Isolation Transformer Ethernet LAN Isolation Transformer

Large Image :  Ethernet LAN Isolation Transformer

Product Details:
Place of Origin: China
Brand Name: GLGNET
Certification: ISO 9001, ISO 14001, UL, RoHS, IECQ QC080000,
Model Number: GS40005LF
Payment & Shipping Terms:
Minimum Order Quantity: Negotiable
Price: Negotiable
Packaging Details: Tray, Tube, Reel, Carton
Delivery Time: 10 work day
Payment Terms: T/T
Supply Ability: 20KK ports /month
Detailed Product Description
Number Of Soldering Foot: 40 Pins Product Type: LAN Isolation Transformer
Mounting Type: SMT SMD Transmission Speed: 10 / 100 Base T
Application: Ethernet Standard: IEEE 802.3u
High Light:

ethernet magnetic transformer


ethernet lan transformer

LAN Isolation Transformer 10 / 100 Base Ethernet Isolation Transformer SMT SMD Mounting



GLGNET LAN Isolation Transformer intended for RJ45 jack applications are compatible with wide a set of Ethernet PHY chipsets supporting VOIP, PoE, PoE+ and PoE++ and data rates including 10/100Base-T, 1000Base-T and 10GBase-T for networking and industrial applications.



GLGNET LAN Isolation Transformer Main applications as following:



  • PCs
  • Workstations
  • Networkings
  • Communications
  • 10 / 100 Base - T Ethernet
  • RJ45 Modular Jacks
  • PCBs
  • Hubs
  • Routers
  • Swithcers
  • Splitters
  • Servers



This is not a definitive list of applications for this product. It represents some of the more common uses.



GLGNET Supplies variety LAN Isolation Transformers and RJ45 Modular Jacks with Integrated Transformer;

Some customers would like to buy RJ45 Modular Jack without magnetics and Isolated Transformers seperately based on their available PCB design, also this way can save cost.

GLGNET can meet your requirements, both RJ45 Modular Jack without magnetics + isolated transformer and RJ45 modular Jack with integrated Magnetics, we can supply;



GLGNET not only supply standard Ethernet isolation Transformer, we also support Customization as required, GLGNET custom service include:



  • Isolation or combined with RJ45 Jack together
  • Support 10/100Base-T, 1000Base-T or 10GBase-T
  • Through hole Mounting Type or SMD Mounting Type
  • Custom different Outline Dimension
  • With POE, POE+, POE++ Functions or without
  • 0 to 70 ℃ or -40 to 85℃ Operating Temperature
  • Support different Soldering Foot Length, "U" form Terminals or "V" formTerminals
  • The Transformer Housing Can be with fixed Slots



1. Features



  • Complies with requirement of IEEE 802.3u standards
    including 350uH OCL with 8mA bias.

  • Symmetrical TX and RX channels for Auto MDI/MDIX

  • Operating temperature range: 0℃ to +70℃.

  • Storage temperature range: -25℃ to +125℃ 

  • Compatible with 10 / 100 Base- T  PHY ICs

  • ROHS peak reflow temperature rating: 245℃

  • Low profile package designed for PCI Express

  • 2250 VDC @ 60 Seconds Hi-po



2. Product Structure​



  • LAN Isolation Transformer
  • SMT SMD mounting type
  • Package Length: 28 mm
  • Package Width: 12.1 mm
  • Package Height: 5.7 mm 
  • 40 Soldering Foots in 2 rows



3. Electrical Specification



Parameter Specification
Operating Temperature 0 ℃ to 70 ℃
Storage Temperature -25 ℃ to 125 ℃
Turns Ratio 1:1±2%

Open Circuit

Inductance (ocl)

350uH MIN@ 100KHz/100mV with 8Ma DC Bias 

Insertion Loss (IL) -1.1dB MAX @ 0.3MHz – 100MHZ;

Return Loss (RL)

Z out = 100 OHM

-18dB MIN @ 0.3MHz – 30MHZ;

-14dB MIN @ 30MHz – 60MHZ;

-12dB MIN @ 60MHz – 80MHZ;


Adjacent Channels

-35dB MIN @ 0.3MHz – 100MHZ
Common Mode Rejection Ratio (CMRR) -30dB MIN @ 0.3MHz – 100MHZ
CW/W 56 pF Max
L.L 0.5 uH Max
HI - POT 2250 VDC @ 60 Seconds



4. Why Choose GLGNET?



  • 20KK Prots / Month Capacity
  • 20 years experiences in Variety Connectors and related Components
  • 1500 Employees
  • 58 R&D Engineers.
  • 22000 square meters Factory
  • We can supply Isolated Transformers and JR45 Jacks with integrated Transformer
  • Our products are compliant with RoHS, REACH and UL certification
  • Long term Corporation with HUAWEI, ZTE, FOXCONN, XIAOMI, TCL and so on
  • ISO9001, ISO14001, QC080000, OHSAS18001, and IECC international management system certification
  • Fast Response, Professional R&D Engineers, Positive Service Team, Ensure all process effective and well-organized;
  • We have our Own Hardware Mold and Plastic Mold
  • Has 3 LS-WEDM Machines
  • Has 12 WEDM Machines and 8 CNC Machines
  • Has 20 Grinding Machines and 12 Electrical Discharge Machines
  • Has 30 Stamping Machines
  • Has 55 Plastic Injection Machines
  • Has Automatic Assembly Workshops



5. Drawing



Ethernet LAN Isolation Transformer 0


Contact Details
Shenzhen GLGNET Electronics Co., LTD

Contact Person: Johnson Gao

Tel: +8618219205831

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