10GBASE-T with PoE bt
WHLT-5335A-121MMB is listed for 10GBASE-T with a PoE bt label and 120 µH OCL at a 15.75 mA DC bias. It is the 10G chip LAN transformer to check first for a PoE bt port.
Transformer products
5335A High-Speed Chip LAN Transformers
Compare WHLT-5335A-151MQB and WHLT-5335A-121MMB for high-speed Ethernet interfaces. They correspond to 2.5G/5G and 10G designs respectively, with different OCL bias conditions and PoE-related parameters. Share the PHY, power requirements and PCB space for selection support, or request samples and pricing for a known part.
Part number search & selector
Find 5335A High-Speed Chip LAN Transformers part numbers
Filter 5335A chip LAN transformers by data rate, PoE label, OCL with bias and size.
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| Image | Part number | Datasheet | Compare | Downloads | Size | Classification | Data Rate | L(μH) | Impedance(Ω) | PoE | Sample |
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WHLT-5335A-121MMB | SPEC | 5335A | X‘fmr+CMC | 10G Base-T | 120 @15.75mA DC BIAS | - | PoE bt |
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WHLT-5335A-151MQB | SPEC | 5335A | X‘fmr+CMC | 2.5G/5G Base-T | 150 @21mA DC BIAS | - | PoE at |
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Series overview
5335A high-speed chip LAN transformer choices
A 5335A chip LAN transformer is a surface-mount X’fmr+CMC part between the PHY and the RJ45 jack of a multi-gig port, where it also handles PoE on the cable side. It is also called a high-speed or 10G chip LAN transformer. Listings pair 2.5G/5GBASE-T with PoE at and 10GBASE-T with PoE bt. For gigabit PoE, see the 4532B chip LAN transformers.
2.5G/5G with PoE at
WHLT-5335A-151MQB is listed for 2.5G/5GBASE-T with a PoE at label and 150 µH OCL at a 21 mA DC bias. Choose this 2.5G chip LAN transformer by rate and PoE label, then confirm the current rating in its datasheet.
Bias condition by rate
At 2.5G/5G the 5335A part is tested at 21 mA DC bias, against 8 mA on 3532A and 10.5 mA on 4532B; at 10G, 15.75 mA against 10.5 mA and 15 mA. Read each OCL value with its bias, never alone.
Layout at multi-gig rates
Above gigabit, insertion loss and return loss across the band matter more than OCL. Keep pairs symmetrical, avoid plane splits under the part, and check the loss limits for your rate in the datasheet.
Applications
5335A chip LAN transformers in multi-gig PoE gear
The 5335A size serves ports where multi-gig data meets higher PoE classes.
Access points with 10G uplinks
High-power Wi-Fi access points with a 10GBASE-T uplink and PoE bt input can use WHLT-5335A-121MMB on the PD side. Check the power class and thermal limits.
2.5G and 5G powered devices
Access points, PTZ cameras and small cells on 2.5G or 5G links with PoE at can use WHLT-5335A-151MQB.
Multi-gig PoE switch ports
PSE ports on multi-gig PoE switches and midspans can use WHLT-5335A-121MMB for 10GBASE-T with PoE bt, or WHLT-5335A-151MQB for 2.5G/5GBASE-T with PoE at.
Downloads & technical resources
5335A chip LAN transformer datasheets and 3D files
Search by part number for the datasheet, 3D model and PCB footprint, then confirm PoE current, loss limits and pads.
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VOOHU’s published product content is reviewed by its engineering team. Specifications, downloads and technical support information are tied to specific part numbers, so you can verify them before requesting samples or a quotation.
Sourcing
Buying 5335A chip LAN transformers from VOOHU
VOOHU manufactures the 5335A chip LAN transformers in its own magnetics factory in Mianyang. Each part number has a datasheet, 3D model and PCB footprint for design review.
Discuss a new design
Contact FAE for a replacement assessment.
Already have a part number? Request samples or a quote.
Samples and quotations
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. For a quotation, give the part number and quantity; typical lead time is 7–10 days.
Replacing multi-gig magnetics
To replace a high-speed chip LAN transformer from another supplier, send its part number and datasheet. Our FAE team compares rate, OCL and bias, PoE current and footprint, then suggests VOOHU candidates to validate with samples before production.
Quality and company
VOOHU is ISO 9001 and ISO 14001 certified. Since 2018 VOOHU has supplied more than 1,500 customers, including 150+ listed companies.
FAQ & related guides
Questions on the 5335A chip LAN transformer
Answers on manufacturing, gigabit ports and what to check before layout.
How do I distinguish 5335A-151MQB from 5335A-121MMB?
The 151MQB corresponds to 2.5G/5G with a minimum OCL of 150 µH at 21 mA. The 121MMB corresponds to 10G with a minimum OCL of 120 µH at 15.75 mA. Select by target speed and full test conditions, not by ranking the inductance values.
Can the whole 5335A family be described as 90 W PoE++ transformers?
No. Family-level marketing, webpage PoE labels and part-specific current data are not interchangeable. Port power depends on the standard and complete circuit. Confirm the exact part, current definition and thermal conditions before making a power claim.
Is the 15.75 mA in 120 µH at 15.75 mA a PoE current rating?
No. It is the DC bias condition for the OCL test. Look up the separate PoE-related current field and confirm its definition; do not substitute one for the other or convert the OCL bias directly into power.
Can 5335A directly replace a multiport LAN transformer module?
Matching speed is not sufficient. Chip components and multiport modules can differ in function count, companion CMCs, pins, space and power paths. Send the current part and schematic so FAE can review BOM and layout differences.
How do I begin selection, quotation and sample validation for a high-speed PoE project?
Start with the PHY, speed, PSE or PD role, target power conditions and project stage. If a complete part number is known, add quantity and destination for a quote. For replacement matching, also provide the existing datasheet so sales and FAE can work together.
Is VOOHU the manufacturer of the 5335A chip LAN transformers?
Yes. VOOHU manufactures them in its own magnetics factory in Mianyang, China, together with the 3532A and 4532B sizes, so PoE af, at and bt designs can be compared with one supplier.
Is there a 5335A part for gigabit ports?
No. The 5335A listings are 2.5G/5GBASE-T and 10GBASE-T. For gigabit PoE, use the 4532B PoE chip LAN transformers, which list PoE af and PoE at parts at 100/1000BASE-T.
What should I check in a 5335A chip LAN transformer datasheet before layout?
The PoE current rating and its temperature condition, insertion and return loss for your rate, the pinout and center tap connections, and the recommended land pattern. Import the 3D model to check clearance near the RJ45 jack.
Engineer support
5335A chip LAN transformer samples and design review
Send the candidate part number and the condition you need reviewed. Sample support can be added after the selection is clear; commercial questions may be discussed in the same engineering conversation.
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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. Sales will respond on business days.
