Package size and dimensions
Stated as length by width by height in millimetres. Height is often the binding constraint, and within one footprint the taller option usually carries more current.
Inductor products
Molded Power Inductors
Molded construction encloses the winding in a magnetic compound, giving a self-shielded part with low audible noise and a soft saturation curve. The range runs from 4.4 by 4.2 millimetres up to 23.5 by 22, covering 0.1 to 150 microhenries and RMS currents to 70 amps.
Part number search & selector
Find Molded Power Inductors part numbers
The table uses the current English-site product records, published selection fields and part-specific technical-file links.
* Frozen Image and Part Number columns · drag horizontally to review all specifications
| Image | Datasheet | Compare | Downloads |
Package Size
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Dimensions (L×W×H)
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Inductance Value
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DCR(mΩ)
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IRMS
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ISAT
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| Image | Part number | Datasheet | Compare | Downloads | Package Size | Dimensions (L×W×H) | Inductance Value | DCR(mΩ) | IRMS | ISAT | Sample |
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WHYT2313 series | SPEC | WHYT Series | 23.5*22*12.6mm | 1.00-100.00uH | 0.95-40mΩ | 11-70A | 9-60A |
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WHYT1770 series | SPEC | WHYT Series | 17.15*17.15*7mm | 2.2-100uH | 2.5-130mΩ | 3.7-29A | 5-34A |
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WHYT1265 series | SPEC | WHYT Series | 13.45*12.6*6.5mm | 4.7-100uH | 8.5-170mΩ | 3.5-16A | 4-24A |
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WHYT1260 series | SPEC | WHYT Series | 13.45*12.6*5.8mm | 4.7-150uH | 9-350mΩ | 1.5-15A | 2.7-24A |
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WHYT1250 series | SPEC | WHYT Series | 13.45*12.6*4.8mm | 0.22-47uH | 0.7-130mΩ | 3-50A | 5-75A |
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WHYT1050 series | SPEC | WHYT Series | 11.5*10*4.8mm | 0.22-100uH | 0.8-290mΩ | 2.1-37A | 2.8-65A |
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WHYT1040 series | SPEC | WHYT Series | 11.5*10*3.8mm | 0.15-100uH | 0.65-340mΩ | 2-45A | 2.3-75A |
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WHYT1030 series | SPEC | WHYT Series | 11.5*10*2.8mm | 0.22-33uH | 0.89-160mΩ | 4-50A | 2.6-33A |
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WHYT0650 series | SPEC | WHYT Series | 7.0*6.6*4.8mm | 0.47-47uH | 3.9-230mΩ | 2-20A | 2.6-21A |
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WHYT0640 series | SPEC | WHYT Series | 7.0*6.6*3.8mm | 0.68-47uH | 4.8-320mΩ | 1.8-17A | 2.5-19A |
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WHYT0630 series | SPEC | WHYT Series | 7.0*6.6*2.8mm | 0.22-47uH | 3-385mΩ | 1.5-24A | 2-34A |
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No matching part numbers
Broaden the selected filters or clear the current search.
By series
Molded inductor series by size band
Series split by footprint and height, which together set current capability and loss.
How to select
Selecting a molded power inductor in four steps
Ripple sets the inductance; IRMS and ISAT set the size; height often decides.
- 01
Calculate the inductance
Derive it from input and output voltage, switching frequency and the ripple current you can accept. Then check the tolerance band at its worst corner.
- 02
Check both current ratings
IRMS caps the continuous current by temperature rise. ISAT caps the peak by inductance roll-off. Your design has to satisfy both, not the friendlier one.
- 03
Pick the size band
Larger footprints and taller bodies give lower DC resistance and higher current. Work back from the height clearance over the converter.
- 04
Verify on the board
Measure ripple, efficiency and the inductor's temperature at full load in the real enclosure, then confirm at the highest rated ambient.
Parameters
Reading molded inductor ratings
IRMS and ISAT are defined differently and both have to be satisfied.
Inductance value
Ranges from about 0.1 to 150 microhenries across the family. Low values suit high switching frequency; higher values reduce ripple at lower frequency.
DC resistance
From about 0.65 milliohm on the largest low-value parts up to several hundred milliohms on the small high-inductance ones. It sets conduction loss.
IRMS
The continuous RMS current producing the datasheet's stated temperature rise. It is the steady-state limit and must be derated for high ambient temperature.
ISAT
The current at which inductance falls by the stated percentage. It caps the instantaneous peak, including startup inrush and load transients.
Shielding
Molded construction encloses the winding in magnetic material, so the part is inherently shielded. That reduces coupling into nearby traces and lowers audible noise.
Compare
Molded inductor series side by side
Footprint and height together decide what current and inductance are available.
Return to the selector ↑| Package Size | Parts | Dimensions (L×W×H) | Inductance Value | DCR(mΩ) | IRMS | ISAT | Action |
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| WHYT Series | 11 | 7.0*6.6*2.8mm, 7.0*6.6*3.8mm, 7.0*6.6*4.8mm, 11.5*10*2.8mm, 11.5*10*3.8mm, 11.5*10*4.8mm, 13.45*12.6*4.8mm, 13.45*12.6*5.8mm, 13.45*12.6*6.5mm, 17.15*17.15*7mm, 23.5*22*12.6mm | 0.22-47uH, 0.68-47uH, 0.47-47uH, 0.22-33uH, 0.15-100uH, 0.22-100uH, 4.7-150uH, 4.7-100uH, 2.2-100uH, 1.00-100.00uH | 3-385mΩ, 4.8-320mΩ, 3.9-230mΩ, 0.89-160mΩ, 0.65-340mΩ, 0.8-290mΩ, 0.7-130mΩ, 9-350mΩ, 8.5-170mΩ, 2.5-130mΩ, 0.95-40mΩ | 1.5-24A, 1.8-17A, 2-20A, 4-50A, 2-45A, 2.1-37A, 3-50A, 1.5-15A, 3.5-16A, 3.7-29A, 11-70A | 2-34A, 2.5-19A, 2.6-21A, 2.6-33A, 2.3-75A, 2.8-65A, 5-75A, 2.7-24A, 4-24A, 5-34A, 9-60A | Filter → |
| WHYTA Series | 7 | 4.4*4.2*1.0mm, 4.4*4.2*1.8mm, 5.4*5.2*1.6mm, 5.4*5.2*2.8mm, 7.0*6.6*1.3mm, 7.0*6.6*1.6mm, 7.0*6.6*2.2mm | 0.15-4.7uH, 0.1-10uH, 0.47-10uH, 0.1-22uH, 0.22-22uH | 9-195mΩ, 4-282mΩ, 9-155mΩ, 3-125mΩ, 8.5-175mΩ, 2.3-350mΩ, 3-230mΩ | 1.8-7.5A, 1.6-13A, 2.5-10.5A, 3.2-25A, 2-10A, 1.8-25A, 2-21A | 2.2-15A, 2-22A, 3-15.5A, 3.5-30A, 3-16A, 2.3-38A, 2.5-34A | Filter → |
| WHYTP Series | 1 | 3.4*3.2*1.8mm | 0.33-10uH | 21-422mΩ | 1.4-8A | 1.6-10A | Filter → |
Application review
Where molded power inductors are used
Confirm output current, switching frequency, ripple budget and height clearance.
DC-DC converters and POL rails
- Confirm the ripple budget and switching frequency, then check IRMS at the real ambient and ISAT against startup inrush.
Automotive and industrial supplies
- Ambient temperature and vibration both matter. Derate IRMS for the environment and confirm the mounting suits the vibration profile.
Compact consumer boards
- Height usually decides. Work back from the clearance available, then confirm the chosen size band still meets both current ratings.
Noise-sensitive equipment
- Molded parts are inherently shielded and quieter than open wirewound. Verify audible noise at your switching frequency on the real assembly.
Documents
Molded inductor datasheets and drawings
Datasheets carry the saturation curve, temperature rise data and land pattern.
Showing representative available file sets. Search to find a specific SKU.
WHYT2313 seriesWHYT Series
WHYTP0320 seriesWHYTP Series
WHYT1770 seriesWHYT Series
WHYT1265 seriesWHYT Series
WHYT1260 seriesWHYT Series
WHYT1250 seriesWHYT Series
- 19
- 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.
Category overview
Molded versus wirewound, and which current rating binds
Two questions decide most molded inductor selections: whether the construction is right for the design, and which of the two current figures limits you.
Discuss a new design
Contact FAE for a replacement assessment.
Already have a part number? Request samples or a quote.
What molded construction changes
The winding is encased in a magnetic composite rather than wound on an exposed core. That makes the part self-shielding, so it couples less into neighbouring traces, and it damps the movement that causes audible buzz. It also gives a softer saturation curve, where inductance falls gradually rather than collapsing.
IRMS and ISAT do different jobs
IRMS is a thermal limit: the continuous RMS current that produces the stated temperature rise. ISAT is a magnetic limit: the current at which inductance has dropped by a stated percentage. A design has to satisfy both. Steady-state load is checked against IRMS, and peaks including startup inrush against ISAT.
Height is usually the real constraint
Within the same footprint, a taller body has more winding volume, which means lower DC resistance and higher current for the same inductance. The range spans from one millimetre high up to more than twelve. In practice the clearance over the converter often decides the series before any electrical parameter does.
FAQ
Molded power inductor questions engineers ask
Answers cover molded versus wirewound, IRMS against ISAT, and shielding.
What is a molded power inductor?
It is an inductor whose winding is encased in a magnetic composite material rather than wound on an exposed core. The construction makes the part self-shielding, reduces audible noise and gives a softer saturation characteristic. They are widely used in DC-DC converters where board space and magnetic coupling both matter.
How does molded compare with wirewound construction?
Molded parts are self-shielded, so they couple less noise into nearby traces, and they are quieter because the winding cannot move. Their saturation curve is softer, falling gradually rather than collapsing. Open wirewound parts can offer lower cost at some sizes. Compare on DCR, IRMS, ISAT and the shielding your layout needs.
What is the difference between IRMS and ISAT?
IRMS is a thermal rating: the continuous RMS current that produces the temperature rise stated in the datasheet. ISAT is a magnetic rating: the current at which inductance has fallen by a stated percentage. Both must be satisfied, IRMS for steady-state load and ISAT for peaks including startup inrush.
Which one usually limits the design?
It depends on the load profile. A steady high current load is usually limited by IRMS and temperature rise. A load with large fast transients, or a converter with significant startup inrush, is usually limited by ISAT. Check both against your actual current waveform rather than assuming.
How do I choose between size bands?
Start from the height clearance over the converter, because that is often the binding mechanical constraint. Within a footprint, a taller body gives lower DC resistance and higher current for the same inductance. Then confirm the band you can fit still meets both current ratings with margin.
Does molded construction really reduce noise?
It reduces two things. Magnetically, the enclosed winding radiates less into neighbouring traces, which helps in dense layouts. Acoustically, the encapsulation damps the winding movement that causes audible buzz at switching frequencies in the audio band. Verify both on your own assembly.
How much should I derate for temperature?
IRMS is defined for a stated temperature rise from a stated ambient. If your enclosure runs hotter or has restricted airflow, the usable current is lower. Measure the part's temperature at full load in the real enclosure at the highest rated ambient rather than trusting the headline figure.
How do I request molded inductor 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 output current, switching frequency, ripple budget, height clearance and ambient temperature, and a sales engineer will shortlist candidates.
Engineer support
Continue after product selection
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
Sample quantity, lead time and cost depend on the project stage and part number. Sales will respond on business days.
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