High impedance at 1–1.5 A
WHAL-4520A-302T0 lists 3000 Ω reference and 2500 Ω minimum impedance at 100 MHz at 1 A, and WHAL-4520A-202T0 2000 Ω reference at 100 MHz at 1.5 A. Both carry 80 mΩ maximum DCR, so keep these EMI chokes on light feeds.
Inductor products
WHAL4520A Common Mode Chokes
WHAL4520A serves lines carrying more current than the compact bands can handle comfortably. Confirm the rated current at your real ambient temperature, then check that DC resistance keeps the rail inside tolerance at full load.
Part number search & selector
Find WHAL4520A Common Mode Chokes part numbers
Filter WHAL4520A common mode chokes by impedance at 100 MHz, DC resistance, rated current, 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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Rated DC Current (A)Max.
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Insulation Resistance (MΩ)Min.
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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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WHAL-4520A-302T0 | SPEC | 4520 | 2500 | 3000 | 80 | 1 | 10 | 50 |
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WHAL-4520A-202T0 | SPEC | 4520 | 1800 | 2000 | 80 | 1.5 | 10 | 50 |
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WHAL-4520A-142T0 | SPEC | 4520 | 1200 | 1400 | 80 | 1.9 | 10 | 50 |
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WHAL-4520A-122T0 | SPEC | 4520 | 1000 | 1200 | 70 | 2.0 | 10 | 50 |
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WHAL-4520A-102T0 | SPEC | 4520 | 800 | 1000 | 60 | 2.1 | 10 | 50 |
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WHAL-4520A-901T0 | SPEC | 4520 | 650 | 900 | 60 | 2.1 | 10 | 50 |
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WHAL-4520A-701T0 | SPEC | 4520 | 500 | 700 | 58 | 2.2 | 10 | 50 |
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WHAL-4520A-501T0 | SPEC | 4520 | 350 | 500 | 55 | 2.4 | 10 | 50 |
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WHAL-4520A-401T0 | SPEC | 4520 | 300 | 420 | 50 | 2.5 | 10 | 50 |
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WHAL-4520A-381T0 | SPEC | 4520 | 250 | 380 | 50 | 2.5 | 10 | 50 |
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WHAL-4520A-301T0 | SPEC | 4520 | 200 | 300 | 45 | 3 | 10 | 50 |
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WHAL-4520A-231T0 | SPEC | 4520 | 180 | 230 | 45 | 3 | 10 | 50 |
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WHAL-4520A-151T0 | SPEC | 4520 | 90 | 150 | 40 | 3.2 | 10 | 50 |
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WHAL-4520A-900T0 | SPEC | 4520 | 60 | 90 | 35 | 3.2 | 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 Series7 part numbers
02WHPL1211A SERIES7 part numbers
03WHAL1513A Series5 part numbers
04WHAL4520A Series14 part numbers
05WHAL7060A Series8 part numbers
06WHAL9070A Series6 part numbers
07WHACM07A40R Series8 part numbers
08WHACM09A50R Series6 part numbers
09WHACM12A65R Series7 part numbers
10WHACM15A60R Series5 part numbers
Series overview
WHAL4520A common mode chokes for low-current inputs
The WHAL4520A common mode choke, or CMC, is VOOHU’s 4520-size power line choke and the smallest body in this power line choke family. Every part is rated 50 V with 10 MΩ minimum insulation resistance; current runs from 1 A to 3.2 A and maximum DCR from 35 mΩ to 80 mΩ. Reference impedance at 100 MHz steps closely from 90 Ω to 3000 Ω. For more current, see WHACM07A40R common mode chokes.
Close steps near 2 A
WHAL-4520A-142T0 (1400 Ω reference at 100 MHz, 1.9 A), WHAL-4520A-122T0 (1200 Ω, 2.0 A) and WHAL-4520A-102T0 (1000 Ω, 2.1 A) step through the 2 A range as DCR falls from 80 mΩ to 60 mΩ.
Mid impedance to 2.5 A
WHAL-4520A-901T0 (900 Ω reference at 100 MHz, 2.1 A), WHAL-4520A-701T0 (700 Ω, 2.2 A) and WHAL-4520A-501T0 (500 Ω, 2.4 A) run on to WHAL-4520A-401T0 and WHAL-4520A-381T0, rated 2.5 A with 420 Ω and 380 Ω reference at 100 MHz.
Up to 3.2 A
WHAL-4520A-151T0 and WHAL-4520A-900T0 reach 3.2 A at 40 mΩ and 35 mΩ, the lowest DCR here. WHAL-4520A-301T0 and WHAL-4520A-231T0 carry 3 A at 45 mΩ with 300 Ω and 230 Ω reference impedance at 100 MHz.
Applications
Where a WHAL4520A common mode choke fits
Small boards with modest input current suit this 50 V series.
Gateways, sensors and cameras
IoT gateways, sensor hubs and small cameras on 5 V or 12 V inputs draw modest current. WHAL-4520A-102T0 or WHAL-4520A-122T0, rated 2.1 A and 2.0 A, fits as a compact common mode filter.
Devices on wall adapters
Set-top boxes, smart speakers and displays often run from a 12 V adapter. WHAL-4520A-301T0 or WHAL-4520A-231T0 at 3 A keeps DCR at 45 mΩ while adding 300 Ω or 230 Ω reference impedance at 100 MHz.
Power outputs on cables
A 12 V or 5 V output feeding an external camera or sensor carries board noise out on its cable. WHAL-4520A-302T0, rated 1 A, adds 3000 Ω reference impedance at 100 MHz as an EMI filter.
Documents
WHAL4520A common mode choke datasheets
Open each WHAL4520A common mode choke datasheet by part number and check the impedance curve, DCR, current rating and outline.
Showing representative available file sets. Search to find a specific SKU.
- 14
- 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
WHAL4520A common mode choke supply and support
VOOHU manufactures WHAL4520A common mode chokes in its own magnetics factory in Mianyang. Each part number has a datasheet; 3D models and PCB footprints are not published, so use the drawing for pads.
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 full part numbers and yearly volume; typical lead time is 7–10 days.
Replacing a 4520-size choke
Our FAE team can review the 4520-size common mode choke you use today. Send its part number and datasheet; we compare impedance, DCR, current, voltage and footprint, then suggest WHAL4520A candidates to validate 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. WHAL4520A common mode chokes are built in its Mianyang magnetics factory and supported by its own FAE team.
FAQ
WHAL4520A common mode choke questions answered
Where the parts are made, which to use at 2.5 A and what to read first.
What line currents does WHAL4520A suit?
It targets lines where the compact size bands run out of margin. The exact figure comes from the datasheet and is defined under stated temperature-rise conditions, so derate for the ambient inside your enclosure and for restricted airflow before deciding it fits.
How much does DC resistance matter at higher current?
More than at low current, because conduction loss rises with the square of the current while the voltage drop rises linearly. At high load both the rail tolerance and the winding temperature become real constraints, so read the maximum DC resistance rather than a typical value.
Does higher current capability cost me impedance?
Usually there is a trade. Thicker wire for current means fewer turns in the same window, which tends to lower inductance and move the impedance peak. Whether that matters depends on where your scan fails, so compare the impedance at your frequency rather than the peak value.
How do I verify thermal performance?
Measure the winding or body temperature on the real board at full load, in the real enclosure, at the highest ambient the product will see. The datasheet rating assumes stated conditions, and a sealed box with no airflow is usually not those conditions.
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.
Where are WHAL4520A common mode chokes made?
VOOHU manufactures the WHAL4520A common mode chokes in its own magnetics factory in Mianyang, China. The impedance steps are close, so you can sample the parts either side of your first choice and compare them on one board.
Which WHAL4520A common mode choke should I use at 2.5 A?
WHAL-4520A-301T0 and WHAL-4520A-231T0 are rated 3 A, and WHAL-4520A-151T0 and WHAL-4520A-900T0 3.2 A, so they leave margin. WHAL-4520A-401T0 and WHAL-4520A-381T0 are rated exactly 2.5 A, which leaves none. For more impedance at that current, step up to WHACM07A40R.
What should I check in a WHAL4520A common mode choke datasheet?
Read the impedance curve, not only the 100 MHz values in the selector. Then confirm DCR and rated current at your load, the 50 V rating against your rail and the outline drawing for the land pattern.
Engineer support
WHAL4520A common mode choke samples and layout 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
- Project stage and annual volume
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.
For samples and a quotation
- Candidate part numbers
From the selector or engineering review
- Quantity and project stage
Prototyping / pilot build / production
- Required delivery date
Specify sample and production timing separately
- Required documentation
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.
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