05.1
Samples
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LAN Transformer
WHSQ24015T0 2.5G/5GBASE-T LAN Transformer
Single-port 2.5G/5GBASE-T LAN transformer (Ethernet transformer): 24-pin SMD, 1500 Vrms isolation, not PoE rated. Operating temperature −40 to +85 °C.
- Data rate
- 2.5G/5GBASE-T
- Ports
- Single port
- Mounting
- SMD
- Isolation voltage
- 1500 Vrms
- PoE
- Not PoE rated
- Operating temperature
- −40 to +85 °C
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01Specifications
WHSQ24015T0 specifications
Key attributes
ParameterValue
Data rate
2.5G/5GBASE-T
Ports
Single port
Operating temperature
−40 to +85 °C
PoE
Not PoE rated
Mounting
SMD
Pins
24
Pitch
1.0 mm
Electrical
ParameterValue
Isolation voltage
1500 Vrms
Values from published data for this part (parameters, FAQ and evaluation report). The datasheet prevails.
WHSQ24015T0Need samples, or a value that is not in this table? Ask our FAE team.
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02Applications
Where WHSQ24015T0 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
WHSQ24015T0Not sure it fits your PHY and layout? An engineer can check your design.
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03Documents
Datasheet, CAD and reports
-
WHSQ24015T0 Datasheet (PDF)2025-09-05 · This part Download ↓
-
3D model (STEP)2026-06-24 · 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 →
WHSQ24015T0Need 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
2.5G/5GBASE-T
2.5G/5GBASE-T
2.5G/5GBASE-T
Mounting
SMD
SMD
DIP
Ports
Single port
Dual port
Dual port
Pins
24
48
48
Pitch
1.0 mm
1.02 mm
1.0 mm
Operating temperature
−40 to +85 °C
−40 to +85 °C
−40 to +85 °C
Isolation voltage
1500 Vrms
1500 Vrms
1500 Vrms
PoE
Not PoE rated
4PPoE (up to 1200 mA)
Not PoE rated
WHSQ24015T0Not sure which part in the series fits? Ask our FAE team which one to sample.
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07FAQ
FAQ LAN Transformer: WHSQ24015T0
What equipment is the WHSQ24015T0 suitable for?
The WHSQ24015T0 suits industrial 2.5G and 5GBASE-T links where the component temperature may fall anywhere between -40 °C and +85 °C and the port draws no power through the magnetics. Typical uses are multi-gigabit data ports on industrial switches, uplinks inside outdoor enclosures and wide-temperature edge equipment.
The WHSQ24015T0 is a single-port, 24-pin SMD transformer whose datasheet gives the centre taps no DC balance current rating, so the part does not support PoE. Where the port must deliver power, move to a part in the 2.5G/5G BASE-T range that publishes a per-channel current.
What reflow parameters does the WHSQ24015T0 require?
The WHSQ24015T0 is an MSL level 1 part with a published reflow profile: peak 250 °C ±3 °C, with 60 to 150 seconds spent above the 217 °C liquidus. Ramp-up is limited to 3 °C per second and ramp-down to 6 °C per second, and the soak sits between 150 °C and 200 °C for 60 to 180 seconds.
Total time from 25 °C to peak must not exceed eight minutes. Level 1 also means a floor life of half a year at or below 30 °C and 60% relative humidity, so the WHSQ24015T0 needs no pre-bake under normal storage.
How do I choose between the WHSQ24015T0 and the WHSQ24015-1PG?
Decide by whether the port feeds power through the centre taps: the WHSQ24015-1PG does, the WHSQ24015T0 does not. Both cover -40 °C to +85 °C, share the package, the suggested pad layout and every high-frequency limit, and both quote 150 µH min open-circuit inductance.
The one decisive difference is current: the WHSQ24015-1PG prints PoE Support 30W and 720 mA of DC balance current per magnetic channel, while the electrical block of the WHSQ24015T0 carries no current item. The same layout therefore serves both, but they are not interchangeable on a powered port.
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
