WHSH16012P4 10/100 BASE Single Port 16PIN Ethernet Transformer POE：720mA

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LAN Transformer

WHSH16012P4 10/100BASE-TX PoE+ LAN Transformer

Single-port 10/100BASE-TX LAN transformer (Ethernet transformer): 16-pin SMD, 1500 Vrms isolation, PoE+ (up to 720 mA). Operating temperature −40 to +85 °C.

Data rate: 10/100BASE-TX
Ports: Single port
Mounting: SMD
Isolation voltage: 1500 Vrms
PoE: PoE+ (up to 720 mA)
Operating temperature: −40 to +85 °C

WHSH16012P4 LAN Transformer perspective view

Product Datasheet Get a Quote or Samples + Add to Inquiry Support 3D Model PCB Layout / Package Contact Us

Quality and compliance

Certificate ISO 9001

Certificate ISO 14001

Test report EU RoHS

Test report REACH

When you click Get a Quote or Samples or Add to Inquiry, part number WHSH16012P4 is filled in automatically.

01Specifications

WHSH16012P4 specifications

Key attributes

ParameterValue

Data rate 10/100BASE-TX

Ports Single port

Operating temperature −40 to +85 °C

PoE PoE+ (up to 720 mA)

Mounting SMD

Pins 16

Pitch 1.27 mm

Electrical

ParameterValue

Isolation voltage 1500 Vrms

Values from published data for this part (parameters, FAQ and evaluation report). The datasheet prevails.

WHSH16012P4Need samples, or a value that is not in this table? Ask our FAE team. Get a Quote or Samples + Add to Inquiry

02Applications

Where WHSH16012P4 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.

Works with

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 Control Security Monitoring Data Communication

WHSH16012P4Not sure it fits your PHY and layout? An engineer can check your design. Get a Quote or Samples + Add to Inquiry

03Documents

Datasheet, CAD and reports

Download Center →

WHSH16012P4 Datasheet (PDF)2025-09-18 · This part Download ↓
3D model (STEP)2026-06-24 · This part Download ↓
PCB Layout / Package2025-12-29 · This part Download ↓
LAN Transformer Reliability TestLatest · Product family View →
LAN Transformer EU RoHS ReportLatest · Product family View →
REACH SVHC test reportLatest · Communication electronic components View →

WHSH16012P4Need another file format, or samples to test? Ask our FAE team. Get a Quote or Samples + Add to Inquiry

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 →

Test report Test report · Product family Reliability test report

— — — Product family 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

05.1

Samples

Samples are available for evaluation, and selected parts are free of charge. Our FAE team will be glad to confirm the options for your project.

Get a Quote or Samples →

06Compare

Same-series Comparison

Red marks values that differ from this part; data from the published parameters of each part.

Parameter WHSH16012P4This part WHD12503G WHD12501TG

Data rate 10/100BASE-TX 10/100BASE-TX 10/100BASE-TX

Mounting SMD DIP DIP

Ports Single port Single port Single port

Pins 16 12 12

Pitch 1.27 mm 2.0 mm 2.0 mm

Operating temperature −40 to +85 °C 0 to +70 °C −40 to +85 °C

Isolation voltage 1500 Vrms 1500 Vrms 1500 Vrms

PoE PoE+ (up to 720 mA) Not PoE rated Not PoE rated

WHSH16012P4Not sure which part in the series fits? Ask our FAE team which one to sample. Get a Quote or Samples + Add to Inquiry

07FAQ

FAQ LAN Transformer: WHSH16012P4

The WHSH16012P4 states -15 dB Min cross talk — why does it differ from the others?

That is the figure on its datasheet: cross talk -15 dB Min from 1–100 MHz, where the other 100M PoE parts state -30 dB Min. Common-mode rejection is the same across all of them at -30 dB Min.

The cross-talk figure bears on near-end crosstalk margin in the link, so a design already tight on EMC or link budget should check this item separately rather than treating the WHSH16012P4 as equivalent because current rating and temperature grade match. Where a design carries a defined cross-talk requirement, tell us and VOOHU will confirm against the current controlled document. Other options sit in the 10/100 BASE-T range.

What are the moisture sensitivity level and reflow conditions of the WHSH16012P4?

MSL level 1, with a floor life of half a year at or below 30 °C / 60% RH.

Reflow peaks at 250 °C ±3 °C with 20 to 40 s spent within 5 °C of the peak. Ramp up no faster than 3 °C per second and down no faster than 6 °C per second. MSL 1 means the WHSH16012P4 needs no bake before it goes on the line, and not every part in the 10/100 BASE-T range publishes this page.

Which class does the 720 mA on the WHSH16012P4 correspond to?

The datasheet states 720 mA current capability, suitable for IEEE 802.3at — PoE+, with the PSE port topping out at 30 W.

Against the other 720 mA 100M PoE part, current rating, operating range and isolation all match; what differs is the cross-talk figure and the accompanying documentation: the WHSH16012P4 states -15 dB Min where the other states -30 dB Min, and it additionally publishes an MSL grade and a reflow profile.

What equipment suits the WHSH16012P4?

100M PoE-powered ports where the component temperature can reach -40 °C or +85 °C.

Typical uses are outdoor surveillance front ends, PoE-powered gateways on industrial sites and the 100M ports of DIN-rail switches. The WHSH16012P4 is surface-mount, MSL 1, reflow-assembled, and its datasheet carries a complete reflow profile. Check the cross-talk figure separately during selection — this part states -15 dB Min, which is not the same grade as the -30 dB Min quoted on most parts in the 10/100 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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WHSH16012P4 10/100BASE-TX PoE+ LAN Transformer