05.1
Samples
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LAN Transformer
WHDG96502PTG Gigabit PoE+ LAN Transformer
Quad-port 10/100/1000BASE-T LAN transformer (Ethernet transformer): 96-pin DIP, 1500 Vrms isolation, PoE+ (up to 720 mA). Operating temperature −40 to +85 °C.
- Data rate
- 10/100/1000BASE-T
- Ports
- Quad port
- Mounting
- DIP
- Isolation voltage
- 1500 Vrms
- PoE
- PoE+ (up to 720 mA)
- Operating temperature
- −40 to +85 °C
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PCB Layout / Package
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01Specifications
WHDG96502PTG specifications
Key attributes
ParameterValue
Data rate
10/100/1000BASE-T
Ports
Quad port
Operating temperature
−40 to +85 °C
PoE
PoE+ (up to 720 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.
WHDG96502PTGNeed samples, or a value that is not in this table? Ask our FAE team.
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02Applications
Where WHDG96502PTG 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
WHDG96502PTGNot sure it fits your PHY and layout? An engineer can check your design.
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03Documents
Datasheet, CAD and reports
-
WHDG96502PTG Datasheet (PDF)2026-01-06 · 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 →
WHDG96502PTGNeed 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
−40 to +85 °C
0 to +70 °C
0 to +70 °C
Isolation voltage
1500 Vrms
1500 Vrms
1500 Vrms
PoE
PoE+ (up to 720 mA)
Not PoE rated
PoE (up to 350 mA)
WHDG96502PTGNot sure which part in the series fits? Ask our FAE team which one to sample.
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07FAQ
FAQ LAN Transformer: WHDG96502PTG
Why is the open-circuit inductance of the WHDG96502PTG specified at 21 mA DC bias?
Because open-circuit inductance is measured under a DC bias, and the figure only means something if the bias is close to the real supply operating point.
The WHDG96502PTG states 350 µH Min at 21 mA bias, while the non-PoE parts in the same family state the same figure at 8 mA. When comparing PoE parts, read the bias condition alongside the inductance — comparing the numbers alone compares two different operating conditions. Bias conditions vary across the 100/1000 BASE-T range.
What is the difference between the WHDG96502PTG and the WHDG96504PTG?
Published electrical ratings, package dimensions, pin numbering and PoE rating all match; the difference is on the schematic — the common-mode choke on each channel is drawn with three windings on the WHDG96502PTG and two on the WHDG96504PTG.
Both assign pins 1–48 to the chip side. Where the design has specific requirements on the common-mode path, tell us the target PHY and EMC approach rather than picking from the parameter table alone.
Which side of the WHDG96502PTG faces the PHY?
Pins 1–48 are the chip side and pins 49–96 the cable side, labelled group by group on the drawing; the common-mode choke sits on the chip side and the transformer on the cable side.
One thing to watch: the WHDG96503PTG shares the package and the pin numbering of the WHDG96502PTG but its drawing labels the two sides the other way round. The parts cannot be placed in the same orientation, and any change between them needs the orientation re-checked against each drawing.
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
