Inductor products
The 3225 body gives more winding space than the 2012 band, which generally buys higher common mode impedance or lower DC resistance. It costs board area and trace spacing, so confirm the layout can take it before moving up.
Part number search & selector
Filter WHAC3225B signal line common mode chokes by impedance, inductance, DC resistance, leakage inductance, isolation resistance, rated current and rated voltage.
* Frozen Image and Part Number columns · drag horizontally to review all specifications
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Common Mode Impedance (10MHZ) ΩMin
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Common Mode Impedance (Ωtyp)
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Inductance (uH) +50/–30%
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RDC (Ω)Max
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Leakage Inductance (nH) typ
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Isolation Resistance (MΩ) Min
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Rated Current Max
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Rated Voltage (V) Max
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| Image | Part number | Datasheet | Compare | Downloads | Size | Common Mode Impedance (10MHZ) ΩMin | Common Mode Impedance (Ωtyp) | Inductance (uH) +50/–30% | RDC (Ω)Max | Leakage Inductance (nH) typ | Isolation Resistance (MΩ) Min | Rated Current Max | Rated Voltage (V) Max | Sample |
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WHAC-3225B-201U4 | SPEC | 3225 | - | - | 200 | 4 | - | 10 | 70mA | 80 |
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WHAC-3225B-800U3 | SPEC | 3225 | - | - | 80 | 2.5 | - | 10 | 150mA | 80 |
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WHAC-3225B-101U0 | SPEC | 3225 | 2200 | 5100 | 100 | 4.9 | 180 | 10 | 150mA | 80 |
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WHAC3225B510U0 | SPEC | 3225 | 1000 | 2600 | 51 | 1.6 | 130 | 10 | 200mA | 80 |
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WHAC-3225B-220U0 | SPEC | 3225 | 500 | 1100 | 22 | 1 | 70 | 10 | 250mA | 80 |
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WHAC-3225B-110U0 | SPEC | 3225 | 300 | 550 | 11 | 0.8 | 50 | 10 | 300mA | 80 |
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Broaden the selected filters or clear the current search.
By interface
The interface sets the data rate and therefore what the choke is allowed to do to the signal.
Series overview
WHAC3225B signal line common mode chokes are 3225-size SMD chokes for differential buses that need more common mode inductance than a 2012 chip usually offers. They are also searched as 3225 common mode chokes, CAN bus common mode chokes or common mode filters. Every part is specified by common mode inductance, from WHAC-3225B-110U0 to WHAC-3225B-201U4. For tighter, faster pairs, see the WH2012 chokes.
Grades rise from WHAC-3225B-110U0 through WHAC-3225B-220U0 and WHAC3225B510U0 to WHAC-3225B-101U0 and WHAC-3225B-201U4. More inductance reaches lower frequencies but usually brings more DC resistance, so read both figures in each datasheet.
For WHAC-3225B-201U4 and WHAC-3225B-800U3, the selector shows inductance but not impedance or leakage inductance, so an impedance filter hides them. Take those figures from their datasheets before comparing them with WHAC-3225B-220U0 or WHAC3225B510U0.
Leakage inductance acts as a small differential inductance in series with the bus. On fast edges it can add ringing, so compare it between grades such as WHAC-3225B-110U0 and WHAC-3225B-101U0 when the bus runs near its rate limit.
A 3225 body takes more area than a 2012 chip and less than a 4532 part. The same codes appear in the larger size on the WHAC4532A page; matching codes do not mean matching ratings.
Applications
Inductance-rated chokes in this size are common on twisted-pair buses that leave the board.
Controllers, drives and gateways often fit a CAN bus common mode choke between transceiver and connector. WHAC3225B510U0 and WHAC-3225B-101U0 are typical candidates; check timing and symmetry on the full harness.
Long RS-485 runs in building automation, meters and industrial I/O pick up common mode noise along the cable. A 3225 choke such as WHAC-3225B-220U0 adds suppression while keeping the footprint compact.
When a field-bus port fails an emission or immunity test, a choke between transceiver and connector is a common fix. Start low, with WHAC-3225B-110U0, and step up only as far as the test requires.
Documents
Search by part number, including WHAC3225B510U0 without hyphens, to open the datasheet and 3D model, then draw the land pattern.
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 WHAC3225B chokes in its own magnetics factory in Mianyang. The downloads hold a datasheet and a 3D model for each part number but no PCB footprint file, so draw the land pattern from the datasheet.
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, name the part numbers, quantity and bus type; typical lead time is 7–10 days.
Send the part number and datasheet of the bus choke you use today. Our FAE team compares inductance, leakage inductance, DC resistance, rated current and footprint, then suggests WHAC3225B 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. The same factory produces the 2012 and 4532 signal line chokes, so one source covers every size.
FAQ
Supply, grade choice for CAN, and how these parts relate to the 4532 range.
More winding space, which usually means either higher common mode impedance at the same DC resistance, or lower DC resistance at the same impedance. The cost is board area and less room between differential traces. Judge it against the failing band and the link budget.
When the 2012 band cannot provide enough impedance across the frequency range your scan fails, or when its DC resistance adds unacceptable loss on a pair that also carries current. If neither applies, the smaller part gives an easier differential layout.
It can. A larger body generally means a longer signal path through the part and more parasitic effects, both of which matter more as the data rate rises. On fast links, measure the eye diagram and return loss with the actual candidate rather than extrapolating.
The land pattern, the spacing between the differential traces and the clearance to neighbouring parts all change. Keep the pair symmetric through the new footprint, then re-run both the emission scan and the signal integrity measurements on the modified board.
With a complete part number, send the part number, quantity, delivery region and the date you need it. If you are still selecting, send the interface, the data rate and the frequency band where your scan fails, and a sales engineer will confirm candidates first.
Yes. VOOHU manufactures WHAC3225B signal line common mode chokes in its own magnetics factory in Mianyang, China. Note that WHAC3225B510U0 is written without hyphens in the selector, so search for it exactly as shown in the downloads.
Many CAN designs start with a mid grade such as WHAC3225B510U0 and move to WHAC-3225B-101U0 if more suppression is needed. For CAN FD, watch leakage inductance and symmetry, because the faster data phase tolerates less distortion.
No. The WHAC4532A page lists 4532-size parts with matching codes, such as WHAC-4532A-510U0, but the bodies, footprints and ratings differ. Compare both datasheets and validate on your own board before you switch from one size to the other.
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 free of charge. Sample quantity and lead time depend on the part number and project stage. Sales will respond on business days.
