Highest impedance
WHACM09A50R302 lists 3000 Ω reference and 2500 Ω minimum impedance at 100 MHz with 75 mΩ maximum DCR. WHACM09A50R222 gives 2200 Ω reference at 100 MHz at a 2.5 A rating, for light loads that need a strong common mode filter.
Inductor products
WHACM09A50R Common Mode Chokes
WHACM09A50R sits between the compact and larger WHACM bands, which often makes it the practical starting point when neither space nor current is severely constrained. Compare the impedance curve against the band your scan fails.
Part number search & selector
Find WHACM09A50R Common Mode Chokes part numbers
Filter WHACM09A50R common mode chokes by impedance at 100 MHz, DCR, rated current, insulation resistance, rated voltage and size.
* Frozen Image and Part Number columns · drag horizontally to review all specifications
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Z(Ω) 100MHz/0.1V Min.
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Z(Ω) 100MHz/0.1V Ref.
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DC Resistance (mΩ) Max.
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Rated DC Current (A)Max.
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Insulation Resistance (MΩ)Min.
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Rated Voltage (V)Max.
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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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WHACM09A50R302 | SPEC | 9070 | 2500 | 3000 | 75 | 3 | 10 | 50 |
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WHACM09A50R222 | SPEC | 9070 | 1700 | 2200 | 60 | 2.5 | 10 | 50 |
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WHACM09A50R102 | SPEC | 9070 | 750 | 1000 | 13 | 4 | 10 | 50 |
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WHACM09A50R701 | SPEC | 9070 | 500 | 700 | 10 | 5 | 10 | 50 |
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WHACM09A50R601 | SPEC | 9070 | 450 | 600 | 8 | 5.5 | 10 | 50 |
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WHACM09A50R301 | SPEC | 9070 | 225 | 300 | 6 | 6 | 10 | 50 |
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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
WHACM09A50R common mode choke selection
The WHACM09A50R common mode choke, or common mode inductor, is the 9070-size member of the WHACM family, placed in the EMI filter of a low-voltage DC input. Every part is rated 50 V with 10 MΩ minimum insulation resistance, and current ratings run from 2.5 A to 6 A. For 48 V inputs, see the 125 V WHACM07A40R common mode chokes.
1000 Ω at 4 A
WHACM09A50R102 gives 1000 Ω reference and 750 Ω minimum impedance at 100 MHz with 13 mΩ maximum DCR and a 4 A rating, so it dissipates far less than the high-impedance pair at the same load.
The 5–6 A end
WHACM09A50R701 (700 Ω reference at 100 MHz, 5 A), WHACM09A50R601 (600 Ω, 5.5 A) and WHACM09A50R301 (300 Ω, 6 A) trade impedance for current step by step, while maximum DCR falls from 10 mΩ to 6 mΩ.
Rated 50 V
Every WHACM09A50R part is rated 50 V. That covers 12 V and 24 V inputs with margin, but not 48 V or PoE supply rails, where an 80 V or 125 V power line choke fits better.
Applications
Typical uses of the WHACM09A50R common mode choke
A 50 V rating points the series at low-voltage DC inputs.
Set-top boxes, NAS and monitors
Devices on a 12 V adapter can fail conducted emissions at the input cable. WHACM09A50R102 at 4 A, or WHACM09A50R222 at 2.5 A where more impedance is needed, filters that input.
Routers and gateways
Routers, gateways and small switches usually run from a 12 V adapter. WHACM09A50R701 or WHACM09A50R601, rated 5 A and 5.5 A, sits at that input with Y capacitors to chassis.
24 V sensors and controllers
Industrial sensors and small controllers often share a 24 V field supply. There, WHACM09A50R301 carries 6 A with 6 mΩ maximum DCR, keeping the voltage drop small at full load.
Documents
Download WHACM09A50R common mode choke datasheets
Find each WHACM09A50R common mode choke datasheet by part number and check the impedance curve, DCR, 50 V rating and outline before placement.
Showing representative available file sets. Search to find a specific SKU.
- 6
- PDF datasheets listed
- 0
- 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
Ordering WHACM09A50R common mode chokes
VOOHU manufactures WHACM09A50R common mode chokes in its own magnetics factory in Mianyang. A datasheet is published for each part on this page; 3D models and PCB footprints are not, so use the datasheet drawing.
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, send the part number, quantity and date; typical lead time is 7–10 days.
Alternatives to a 9070 choke
If the board already uses a 9070-size common mode choke from another supplier, send its part number and datasheet. Our FAE team checks impedance at 100 MHz, DCR, ratings and pad layout, then suggests WHACM09A50R candidates to validate with samples before production.
Company and quality
VOOHU is ISO 9001 and ISO 14001 certified. Since 2018 VOOHU has supplied more than 1,500 customers, including 150+ listed companies. Questions on any WHACM09A50R common mode choke datasheet go directly to its own FAE team.
FAQ
Common questions on WHACM09A50R common mode chokes
Who makes the series, which part fits a 3 A input and which files exist.
Why start evaluation in the middle of a range?
Because it usually leaves room to move either way. If the mid band part covers your failing frequency and carries the current with margin, you are done. If impedance falls short you step up; if board space is the binding constraint you step down and re-check the current.
How much margin should I leave on rated current?
Enough to cover the worst-case continuous load, the highest ambient temperature the product sees, and any restriction on airflow inside the enclosure. The datasheet figure is defined under stated conditions, and a sealed box at elevated ambient is rarely those conditions.
Can I compare WHACM parts by size code alone?
Use the size code as a first filter only. Two parts in adjacent bands may differ in turns, wire gauge and core material, which changes impedance, current and DC resistance in ways the size code does not express. Read the datasheets before shortlisting.
What if the impedance is right but the current is not?
Move up the range and re-check the impedance at your frequency, because a larger core usually shifts the peak lower. If the failing band is high, you may need a different construction rather than simply a bigger part. Send the conditions to our engineers.
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 board space available, and a sales engineer will confirm candidates first.
Who manufactures the WHACM09A50R common mode choke?
VOOHU manufactures the WHACM09A50R common mode chokes in its own magnetics factory in Mianyang, China. The datasheets here are VOOHU documents, so our FAE team can explain any value in them, from the 50 V rating to the impedance curve.
Which WHACM09A50R common mode choke suits a 12 V, 3 A input?
Start with WHACM09A50R102, rated 4 A with 1000 Ω reference impedance at 100 MHz. WHACM09A50R222 has more impedance but is rated 2.5 A, below that load. For more impedance at 3 A and above, the larger WHACM15A60R series reaches 1500 Ω at 100 MHz with 5 A.
Is there a 3D model for the WHACM09A50R common mode choke?
Not on this page. The WHACM09A50R downloads are datasheets, whose outline drawing gives what you need for the land pattern. If your layout flow needs a 3D model of a specific part, ask our FAE team.
Engineer support
WHACM09A50R common mode choke samples and EMI 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
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Temperature, isolation voltage and PoE current basis
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Pin count, pitch and spacing between pin rows
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When you need candidates and a comparison of differences
Engineering review identifies candidate parts and explains the differences.
For samples and a quotation
- Candidate part numbers
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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.
Related guides and reviews
Fixing conducted emissions at a DC power port
Common mode chokes for signal and power lines
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