WHSQ24B04T0 Single Port SMD 2.5G/5G BASE-T PIN24 LAN Transformer

Homepage / Products

LAN Transformer

WHSQ24B04T0 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

WHSQ24B04T0 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 WHSQ24B04T0 is filled in automatically.

01Specifications

WHSQ24B04T0 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 1.02 mm

Electrical

ParameterValue

Isolation voltage 1500 Vrms

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

WHSQ24B04T0Need samples, or a value that is not in this table? Ask our FAE team. Get a Quote or Samples + Add to Inquiry

02Applications

Where WHSQ24B04T0 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

WHSQ24B04T0Not 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 →

WHSQ24B04T0 Datasheet (PDF)2025-07-21 · 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 →

WHSQ24B04T0Need 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 WHSQ24B04T0This part WHSQ48802C2 WHSQ24015-1PG

Data rate 2.5G/5GBASE-T 2.5G/5GBASE-T 2.5G/5GBASE-T

Mounting SMD SMD SMD

Ports Single port Dual port Single port

Pins 24 48 24

Pitch 1.02 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) PoE+ (up to 720 mA)

WHSQ24B04T0Not 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: WHSQ24B04T0

Can the WHSQ24B04T0 reuse an existing 24-pin 2.5G/5G transformer footprint?

No. The WHSQ24B04T0 is on a 1.02 mm lead pitch, whereas the other 24-pin parts in the VOOHU 2.5G/5G range use 1.27 mm. A different pitch means the land pattern has to be redrawn; it is not a tweak. The body of the WHSQ24B04T0 measures 13.60 mm by 12.00 mm and stands 6.25 mm tall, so it is both taller and squarer than the two lower-profile packages already published in this range.

Where a board is already laid out for the 1.27 mm family, stay inside that pitch when selecting from the 2.5G/5G BASE-T range. For a new layout, the suggested land pattern works to an 11.22 mm lead span with 0.65 mm pads.

What equipment is the WHSQ24B04T0 suited to?

The WHSQ24B04T0 suits single-port 2.5G/5G data ports where the component temperature may fall anywhere between -40 °C and +85 °C. Typical uses are access ports on industrial switches, 2.5G ports inside unattended wide-temperature enclosures, and outdoor wireless equipment running a 2.5G uplink. The WHSQ24B04T0 carries no PoE rating, so the port has to be powered locally and the centre taps cannot double as a supply path.

Note that -40 °C is the lower operating limit of the component, not a demonstrated cold-start capability for the finished product – low-temperature power-up still has to be measured with the target PHY and cable. Other options are listed in the 2.5G/5G BASE-T range.

Does the WHSQ24B04T0 need baking before assembly?

Not within its floor life. The WHSQ24B04T0 is rated MSL Grade 1 with a floor life of 0.5 year at 30 °C and 60% RH or below. Grade 1 is the least restrictive moisture sensitivity level, so as long as storage and line-side conditions stay inside that window and the reels go down within the floor life, no separate bake is needed for this part.

Run reflow to the profile published for the WHSQ24B04T0: a peak of 250 °C plus or minus 3 °C, 60 to 150 seconds above liquidus, and a ramp-up rate of 3 °C per second maximum. Reels that have been outside those conditions should go through your own moisture-control procedure before assembly.

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 →

REQUEST TYPE

Choose a Request Type and Fill in the Fields

WHSQ24B04T0

Choose a type, fill in the fields, and leave your contact details. Enter "Not sure" for any unknown parameter.

Part Number *

Quantity *

Target Date *

Additional Notes (optional)

Contact Details

Name *

Company *

Email *

Phone (optional)

Verification Code *

Have attachments? Send datasheets, BOMs, or drawings to voohu@voohu.cn with your name and company, and our engineers will handle them together with this request.

By submitting, you agree that we may contact you about this request. Privacy Policy Prefer not to fill in a form? Call +86 400-1048-018 on weekdays 8:30–18:00 (UTC+8) or email voohu@voohu.cn

VOOHU
Founded in 2018
Suzhou, China
1,500+ customers
FAE support

Connect with Us

13th Floor, Building G, Kaiping Business Center, No. 11666 East Taihu Avenue, Wujiang District, Suzhou City, Jiangsu Province, China

TEL+86 133 5804 1040 (WhatsApp) TEL+86 180 2130 1136 / +86 180 2130 1120

E-MAIL voohu@voohuele.com

WHSQ24B04T0 2.5G/5GBASE-T LAN Transformer