Transformer products
Compare Gigabit, 2.5G/5G and 10G chip LAN transformers in the 4532B family, with PoE requirements and OCL conditions checked by part number. For a new design, start with the PHY and power requirements. For an existing-part replacement, ask us to review the differences. Request samples or production pricing directly once the part number is known.
Part number search & selector
Filter 4532B chip LAN transformers by data rate, OCL with DC bias, PoE label and classification.
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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-4532B-121MMT | SPEC | 4532B | X‘fmr+CMC | 10G Base-T | 120 @15mA DC BIAS | - | PoE at |
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WHLT-4532B-181MQT | SPEC | 4532B | X‘fmr+CMC | 2.5G/5G Base-T | 180 @10.5mA DC BIAS | - | PoE at |
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WHLT-4532B-151MQT | SPEC | 4532B | X‘fmr+CMC | 2.5G/5G Base-T | 150 @10.5mA DC BIAS | - | PoE at |
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WHLT-4532B-351MGF | SPEC | 4532B | X‘fmr+CMC | 100/1000 BASE-T | 350 @8mA DC BIAS | - | PoE af |
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WHLT-4532B-121MGT | SPEC | 4532B | X‘fmr+CMC | 100/1000 BASE-T | 120 @10.8mA DC BIAS | - | PoE at |
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WHLT-4532B-201MGF | SPEC | 4532B | X‘fmr+CMC | 100/1000 BASE-T | 200 @8mA DC BIAS | - | PoE af |
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WHLT-4532B-201MGN | SPEC | 4532B | X‘fmr+CMC | 100/1000 BASE-T | 200 @8mA DC BIAS | - | Non-PoE |
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Counts reflect the current published product data.
Series overview
A 4532B PoE chip LAN transformer is a surface-mount X’fmr+CMC part between the PHY and the RJ45 jack that can also carry PoE current on the cable side. You may also see it called a PoE chip Ethernet transformer or a surface mount LAN transformer. The range covers gigabit, 2.5G/5G and 10GBASE-T with non-PoE, PoE af and PoE at labels. For PoE bt, compare the 5335A chip LAN transformers.
PoE at is listed on WHLT-4532B-121MGT, WHLT-4532B-151MQT, WHLT-4532B-181MQT and WHLT-4532B-121MMT, PoE af on WHLT-4532B-201MGF and WHLT-4532B-351MGF, and WHLT-4532B-201MGN is non-PoE. Confirm the current rating in each datasheet.
For 100/1000BASE-T, OCL runs from 120 µH at 10.8 mA on WHLT-4532B-121MGT to 350 µH at 8 mA on WHLT-4532B-351MGF, with WHLT-4532B-201MGF and WHLT-4532B-201MGN at 200 µH and 8 mA. Pick the PoE label first, then the OCL.
WHLT-4532B-151MQT (150 µH at 10.5 mA) and WHLT-4532B-181MQT (180 µH at 10.5 mA) serve 2.5G/5GBASE-T, and WHLT-4532B-121MMT (120 µH at 15 mA) serves 10GBASE-T. Each carries a PoE at label.
Each 4532B chip LAN transformer quotes OCL at a DC bias, from 8 mA on the gigabit af and non-PoE parts up to 15 mA on the 10G part. The bias is a test condition, not a PoE current rating, so read the current rating separately.
Applications
The 4532B size serves compact PoE ports on both the powered-device and the PSE side.
Gigabit IP cameras and video intercoms on PoE can use WHLT-4532B-121MGT with its PoE at label, or WHLT-4532B-201MGF where PoE af is enough. Check temperature rise inside sealed housings.
Wi-Fi access points with 2.5G or 5G uplinks on PoE at power can use WHLT-4532B-151MQT or WHLT-4532B-181MQT. They differ in OCL, so follow the PHY vendor’s magnetics guidance.
Gigabit PSE ports on compact PoE switches can use WHLT-4532B-121MGT, and 10GBASE-T ports that carry PoE at can use WHLT-4532B-121MMT. Plan copper area and airflow for the full port load.
Downloads & technical resources
Search a part number for its datasheet, 3D model and PCB footprint, then confirm the PoE current rating and pads before layout.
Showing representative available file sets. Search to find a specific SKU.
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
VOOHU manufactures the 4532B chip LAN transformers in its own magnetics factory in Mianyang. Datasheets, 3D models and PCB footprints are published for every part number, so the PoE port can be reviewed before samples are ordered.
Discuss a new design
Contact FAE for a replacement assessment.
Already have a part number? Request samples or a quote.
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, include the part number, quantity and target date; typical lead time is 7–10 days.
To replace a PoE chip LAN transformer from another supplier, send its part number and datasheet. Our FAE team compares data rate, OCL and bias, PoE rating, pinout and footprint, then suggests VOOHU candidates to validate with samples before production.
VOOHU is ISO 9001 and ISO 14001 certified. Since 2018 VOOHU has supplied more than 1,500 customers, including 150+ listed companies. Every 4532B chip LAN transformer is produced in the Mianyang magnetics factory.
FAQ & related guides
Answers on manufacturing, planning for PoE on a gigabit board, and where the 5335A size takes over.
Do not assume interchangeability from those labels. Confirm speed, current definitions, temperature rise and the complete PoE circuit. Ask engineering to review conditions outside the confirmed documentation; an at variant is not an unconditional replacement for an af variant.
The 121MGT is the Gigabit option, while 121MMT is the 10G option. Although both have a 120 µH selection value, their bias and frequency conditions differ. Do not omit the complete suffix or replace one solely on that 120 µH value.
No. Inductance is constrained by the PHY, circuit and test conditions. Compare loss performance, bias, DCR and power conditions in the required frequency range. Select for the circuit rather than the largest number.
Choose the part and speed first, then read the datasheet’s frequency bands, dB definitions and limit conventions. Do not compare isolated values from different bands or claim percentage improvements without corresponding test evidence.
For replacement review, provide the original-part documentation, PHY, speed, power architecture and mechanical constraints. Sales will involve FAE for matching. For sample pricing, send the target part, quantity and timing directly; these requests do not need to follow a fixed sequence.
Yes. VOOHU manufactures them in its own magnetics factory in Mianyang, China, along with the 3532A, 4532E and 5335A sizes, so PoE af, PoE at and PoE bt parts all come from one source.
Lay out for the 4532B size and fit WHLT-4532B-201MGN, the non-PoE gigabit part. WHLT-4532B-201MGF (PoE af) and WHLT-4532B-121MGT (PoE at) share the size class, so a powered version can follow after a pinout and footprint check.
When the port needs PoE bt. Every 4532B part stops at PoE at, while the 5335A range lists PoE bt at 10GBASE-T. For 2.5G/5G with PoE at, both sizes offer parts, so compare the bias condition and board space.
Engineer support
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.
Include the document revision
Temperature, isolation voltage and PoE current basis
Pin count, pitch and spacing between pin rows
To help prioritize samples and evaluation
When you need candidates and a comparison of differences
Engineering review identifies candidate parts and explains the differences.
From the selector or engineering review
Prototyping / pilot build / production
Specify sample and production timing separately
Compliance documents, material declarations or third-party reports
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.
