2 mΩ at 10 A
As a high current common mode choke, WHACM12A65R800 lists the lowest DCR in the series, 2 mΩ maximum, with a 10 A rating. It is also the low-impedance end, so read its impedance curve in the datasheet first.
Inductor products
WHACM12A65R Common Mode Chokes
WHACM12A65R moves up the WHACM range for lines carrying more current, where DC resistance and temperature rise start to drive the decision. Confirm the derated current at the real ambient before committing to the footprint.
Part number search & selector
Find WHACM12A65R Common Mode Chokes part numbers
Filter WHACM12A65R common mode chokes by rated DC current, maximum DCR, impedance at 100 MHz, rated voltage, insulation resistance and size.
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| Image | Part number | Datasheet | Compare | Downloads | Dimensions(L*W*H MAX) | Z(Ω) 100MHz/0.1V Min. | Z(Ω) 100MHz/0.1V Ref. | DC Resistance (mΩ) Max. | Rated DC Current (A)Max. | Insulation Resistance (MΩ)Min. | Rated Voltage (V)Max. | Sample |
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WHPL-1211A-231T0 | SPEC | 1211 | 80 | 230 | 4 | 10 | 10 | 125 |
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WHACM12A65R272 | SPEC | 1211 | 2300 | 2700 | 50 | 1.5 | 10 | 125 |
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WHACM12A65R222 | SPEC | 1211 | 2200 | 2500 | 35 | 1.8 | 10 | 125 |
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WHACM12A65R102 | SPEC | 1211 | 750 | 1000 | 14 | 6 | 10 | 125 |
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WHACM12A65R801 | SPEC | 1211 | 600 | 800 | 8 | 8 | 10 | 125 |
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WHACM12A65R701 | SPEC | 1211 | 500 | 700 | 6 | 8 | 10 | 125 |
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WHACM12A65R800 | SPEC | 1211 | 80 | 230 | 2 | 10 | 10 | 125 |
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By series
Power line common mode choke families
Families differ in construction and size band, which sets impedance and current together.
01WHAL1211A SeriesPart numbers: 7
02WHPL1211A SERIESPart numbers: 7
03WHAL1513A SeriesPart numbers: 5
04WHAL4520A SeriesPart numbers: 14
05WHAL7060A SeriesPart numbers: 8
06WHAL9070A SeriesPart numbers: 6
07WHACM07A40R SeriesPart numbers: 8
08WHACM09A50R SeriesPart numbers: 6
09WHACM12A65R SeriesPart numbers: 7
10WHACM15A60R SeriesPart numbers: 5
Series overview
Inside the WHACM12A65R common mode choke range
A WHACM12A65R common mode choke, also called a common mode coil, is a 1211-size power line choke rated 125 V for DC inputs where loss and heat matter. Maximum DCR runs from 50 mΩ on the highest-impedance part down to 2 mΩ, and rated current from 1.5 A to 10 A. The 1211 selector also lists WHPL-1211A-231T0, which belongs to a different series. For 13 A at 80 V, see WHACM15A60R.
8 A at 700–800 Ω
WHACM12A65R801 and WHACM12A65R701 are both rated 8 A. WHACM12A65R801 lists 800 Ω reference impedance at 100 MHz with 8 mΩ DCR; WHACM12A65R701 lists 700 Ω at 100 MHz with 6 mΩ and dissipates less.
1000 Ω at 6 A
WHACM12A65R102 gives 1000 Ω reference and 750 Ω minimum impedance at 100 MHz with 14 mΩ maximum DCR and a 6 A rating, a balanced common mode filter between the high-impedance end and the low-DCR parts.
High impedance, light current
WHACM12A65R272 lists 2700 Ω and WHACM12A65R222 2500 Ω reference impedance at 100 MHz, rated 1.5 A and 1.8 A with 50 mΩ and 35 mΩ maximum DCR. Keep these EMI chokes for low-current feeds.
Applications
WHACM12A65R common mode choke applications
The 125 V rating leaves room on 48 V and 54 V rails.
PoE switch supply inputs
A PoE switch draws several amps from a 54 V supply. WHACM12A65R801 or WHACM12A65R701, rated 8 A and 125 V, is a common mode choke for power supply inputs like this one.
24 V and 48 V equipment
Industrial controllers and test equipment often run from 24 V or 48 V buses. WHACM12A65R102 at 6 A suits inputs that need impedance, and WHACM12A65R800 at 10 A suits inputs where loss dominates.
Auxiliary and standby rails
A standby supply draws little current but can carry strong high-frequency noise. WHACM12A65R272 and WHACM12A65R222, rated 1.5 A and 1.8 A, add high impedance at 100 MHz on such rails.
Documents
WHACM12A65R common mode choke datasheets and drawings
Search each WHACM12A65R common mode choke datasheet by part number, then check current, DCR and land pattern before layout.
Showing representative available file sets. Search to find a specific SKU.
- 7
- PDF datasheets listed
- 1
- 3D file sets listed
- 0
- PCB footprints listed
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
WHACM12A65R common mode choke supply from VOOHU
VOOHU makes WHACM12A65R common mode chokes in its own magnetics factory in Mianyang. A datasheet is published for each WHACM12A65R part, so you can shortlist here before you request samples or a quotation.
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. List the part numbers, quantities and target date for a quotation; typical lead time is 7–10 days.
Replacing a 1211-size choke
To replace another maker’s 1211-size common mode choke, send its part number and datasheet. Our FAE team compares impedance at 100 MHz, DCR, ratings and land pattern, and names WHACM12A65R candidates to check with samples before production.
Quality
VOOHU is ISO 9001 and ISO 14001 certified. Since 2018 VOOHU has supplied more than 1,500 customers, including 150+ listed companies. Production of every WHACM12A65R common mode choke runs in VOOHU’s own Mianyang magnetics factory.
FAQ
WHACM12A65R common mode choke FAQ
Manufacturing, low DCR against high impedance, and land patterns across the series.
What changes as I move up the WHACM range?
More winding window allows thicker wire, which lowers DC resistance and raises current capability. More core material tends to increase inductance and move the impedance peak toward lower frequencies. Both effects matter, and which one dominates depends on your failing band.
How do I check thermal margin properly?
Measure the part on the real board, at full continuous load, in the real enclosure, at the highest ambient the product is rated for. The datasheet current is defined under stated temperature-rise conditions, which rarely match a sealed box with limited airflow.
Is DC resistance or impedance the binding constraint?
That depends on the design. On a high current rail, DC resistance often binds first through voltage drop and heat. On a line that passes easily but fails emissions, impedance binds. Identify which one is limiting before you start comparing part numbers.
Can I parallel two smaller chokes instead?
It is not a direct substitute. Paralleling changes the current sharing, the effective impedance and the layout, and unequal sharing can push one part beyond its rating. If space is forcing the question, send the conditions to our engineers rather than assuming it works.
How do I request samples or a quote?
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 line current, the frequency band where your scan fails and the ambient temperature, and a sales engineer will confirm candidates.
Does VOOHU make the WHACM12A65R common mode choke itself?
Yes. VOOHU manufactures the WHACM12A65R common mode chokes in its own magnetics factory in Mianyang, China. Every part shares the 1211 size, a 125 V rating and 10 MΩ minimum insulation resistance, so one voltage check covers the whole series.
Should I pick WHACM12A65R800 or WHACM12A65R801 for an 8 A load?
WHACM12A65R801 is rated exactly 8 A, which leaves no margin at a continuous 8 A load. WHACM12A65R800 is rated 10 A with 2 mΩ maximum DCR, but as the low-impedance end of the series, check its impedance at your failing frequency first.
Do all WHACM12A65R common mode chokes share one land pattern?
They share the 1211 size code and a 125 V rating, but the selector does not list pad dimensions, so confirm the land pattern in each datasheet drawing before moving between parts. 3D models and PCB footprint files are not published for this series.
Engineer support
WHACM12A65R common mode choke samples and 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.
- 1Selected part numbers
- 2Engineering review
- 3Sample request
- 4Commercial discussion
For a replacement review
- Original part and datasheet
Include the document revision
- Operating conditions
Temperature, isolation voltage and PoE current basis
- Package constraints
Pin count, pitch and spacing between pin rows
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To help prioritize samples and evaluation
- Target review date
When you need candidates and a comparison of differences
Engineering review identifies candidate parts and explains the differences.
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- Candidate part numbers
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- Quantity and project stage
Prototyping / pilot build / production
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Specify sample and production timing separately
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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.
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