05.1
Samples
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WHDG96503G Quad Ports DIP Gigabit Base-T PIN96 PoE (up to 350 mA) LAN Transformer
LAN Transformer
WHDG96503G Gigabit PoE LAN Transformer
Quad-port 10/100/1000BASE-T LAN transformer (Ethernet transformer): 96-pin DIP, 1500 Vrms isolation, PoE (up to 350 mA). Operating temperature 0 to +70 °C.
- Data rate
- 10/100/1000BASE-T
- Ports
- Quad port
- Mounting
- DIP
- Isolation voltage
- 1500 Vrms
- PoE
- PoE (up to 350 mA)
- Operating temperature
- 0 to +70 °C
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Product Datasheet
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3D Model
PCB Layout / Package
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01Specifications
WHDG96503G specifications
Key attributes
ParameterValue
Data rate
10/100/1000BASE-T
Ports
Quad port
Operating temperature
0 to +70 °C
PoE
PoE (up to 350 mA)
Mounting
DIP
Pins
96
Pitch
2.0 mm
Electrical
ParameterValue
Isolation voltage
1500 Vrms
Values from published data for this part (parameters, FAQ and evaluation report). The datasheet prevails.
WHDG96503GNeed samples, or a value that is not in this table? Ask our FAE team.
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02Applications
Where WHDG96503G is used
- Switches and routers
- Wireless access points
- IP cameras
- Industrial control devices
Typical application
The transformer isolates the PHY from the cable and couples the TX and RX differential pairs to the RJ45 jack.
Center-tap biasing on the PHY side depends on the PHY type (voltage-mode or current-mode).
Typical application for reference. Follow the PHY vendor's reference design.
Design notes
- 01Connect the center taps according to your PHY type.Voltage-mode and current-mode PHYs need different center-tap biasing; a mismatch can break auto-negotiation.Check with your PHY →
- 02Terminate the line-side center taps with a Bob Smith network.It gives common-mode noise a defined path to chassis ground and helps EMC.
- 03Add line-side surge protection for outdoor or long-cable ports.Residual surge energy through the transformer can still damage the PHY.Troubleshooting guide →
Reference designs by application:Industrial ControlSecurity MonitoringData Communication
WHDG96503GNot sure it fits your PHY and layout? An engineer can check your design.
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03Documents
Datasheet, CAD and reports
-
WHDG96503G Datasheet (PDF)2024-11-25 · This part Download ↓
-
3D model (STEP)2026-06-05 · This part Download ↓
-
PCB Layout / Package2025-12-29 · This part Download ↓
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LAN Transformer Reliability TestLatest · Product family View →
-
LAN Transformer EU RoHS ReportLatest · Product family View →
-
REACH SVHC test reportLatest · Communication electronic components View →
WHDG96503GNeed another file format, or samples to test? Ask our FAE team.
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04Quality
Quality and compliance
DocumentNo.Issued / tested byDateApplies toActions
Certificate
Certificate · Company
ISO 9001:2015No. 19826Q02503R101
Quality management systemBeijing Xinjiyuan Certification Co., Ltd.Valid 2026-10-17 to 2029-10-16
19826Q02503R101
Beijing Xinjiyuan Certification Co., Ltd.
Valid2026-10-17 to 2029-10-16
Company
View PDF →
Verify →
Scope: R&D and sales of precision electronic connectors
Certificate
Certificate · Company
ISO 14001:2015No. 19826E01323R101
Environmental management systemBeijing Xinjiyuan Certification Co., Ltd.Valid 2026-10-17 to 2029-10-16
19826E01323R101
Beijing Xinjiyuan Certification Co., Ltd.
Valid2026-10-17 to 2029-10-16
Company
View PDF →
Verify →
Scope: R&D and sales of precision electronic connectors
Test report
Test report · LAN transformers
EU RoHSNo. WTH26H06190301C
2011/65/EU and (EU) 2015/863, 10 substancesWaltek Testing Group HCT (Shenzhen) Co., Ltd.Issued 2026-07-31
WTH26H06190301C
Waltek Testing Group HCT (Shenzhen) Co., Ltd.
Issued2026-07-31
LAN transformers
View PDF →
Test report
Test report · Communication electronic components
REACH SVHCNo. WTH26H06167853C
253 substancesWaltek Testing Group HCT (Shenzhen) Co., Ltd.Issued 2026-07-01
WTH26H06167853C
Waltek Testing Group HCT (Shenzhen) Co., Ltd.
Issued2026-07-01
Communication electronic components
View PDF →
ISO certificates cover VOOHU's management systems. RoHS and REACH test reports cover tested samples of each product family.
05Ordering
Ordering and delivery
06Compare
Same-series Comparison
Red marks values that differ from this part; data from the published parameters of each part.
Data rate
10/100/1000BASE-T
10/100/1000BASE-T
10/100/1000BASE-T
Mounting
DIP
DIP
DIP
Ports
Quad port
Quad port
Quad port
Pins
96
96
96
Pitch
2.0 mm
2.0 mm
2.0 mm
Operating temperature
0 to +70 °C
−40 to +85 °C
−40 to +85 °C
Isolation voltage
1500 Vrms
1500 Vrms
1500 Vrms
PoE
PoE (up to 350 mA)
PoE+ (up to 720 mA)
PoE+ (up to 720 mA)
WHDG96503GNot sure which part in the series fits? Ask our FAE team which one to sample.
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07FAQ
FAQ LAN Transformer: WHDG96503G
Which PoE class does the 350 mA on the WHDG96503G correspond to?
The datasheet states IEEE 802.3af compliant performance with 350 mA current capability — the original PoE class, where the PSE port tops out at 15.4 W.
For 802.3at (PoE+) or 802.3bt the WHDG96503G is not the right part and a device rated for that class should be chosen instead. When budgeting port power, tell us the per-port current you are targeting and VOOHU will confirm the applicable scope against the current controlled document. Higher-class parts sit in the 100/1000 BASE-T range.
WHDG96503G or WHDG96502PTG — how is the choice made?
Filter on two things, PoE class and temperature grade: the WHDG96503G is 802.3af / 350 mA rated for 0 °C to +70 °C, the WHDG96502PTG is 802.3at / 720 mA rated for -40 °C to +85 °C.
Both sit on the same 96-pin land pattern so the board does not change, but the swap crosses a class boundary on supply and a grade boundary on temperature.
What equipment suits the WHDG96503G?
Indoor four-port Gigabit equipment where the component temperature stays between 0 °C and +70 °C and port power is designed to IEEE 802.3af.
The WHDG96503G needs roughly a 28 × 29 mm square area on the PCB with more than 14.50 mm of clearance above it. Equipment that powers up below 0 °C, or that has to supply 802.3at and above, needs the wide-temperature or higher-current grade from the 100/1000 BASE-T range.
08Support
Talk to an engineer
01Replace your current partSend the part number you use today. An engineer compares pinout, package and electrical ratings and lists the differences.Start a replacement review →
02Match it to your PHYTell us your PHY. We check center-tap wiring, termination and the matching RJ45 jack.Check my design →
03Link drops, hi-pot or EMC failuresSend the symptoms and test conditions. Get an FAE-reviewed troubleshooting checklist.Start troubleshooting →
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- VOOHU
- Founded in 2018
- Suzhou, China
- 1,500+ customers
- FAE support
Typical application
