Inductor products
WHPBU-131308N spans the widest inductance range at 110 to 500 nanohenries and reaches 105 amps saturation at 100 degrees. The larger square body gives that peak capability, so plan the phase-to-phase spacing before committing.
Part number search & selector
Filter WHPBU-131308N power beads by initial inductance, tolerance, DCR, saturation current at 25 °C and 100 °C, and heating current.
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Initial Inductance (nH)
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DCR(mΩ)
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1-Saturation Current@25℃ (Amps)(typ)
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2-Saturation Current@100℃(Amps)(typ)
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Heating Current(Amps)(typ)
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| Image | Part number | Datasheet | Compare | Downloads | category | Initial Inductance (nH) | Tolerance (±%) | DCR(mΩ) | 1-Saturation Current@25℃ (Amps)(typ) | 2-Saturation Current@100℃(Amps)(typ) | Heating Current(Amps)(typ) | Sample |
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WHPBU-131308N-R50L0 | SPEC | WHPBU-131308N | 500 | 15 | 0.32 ± 9.4% | 28 | 23 | 45 |
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WHPBU-131308N-R44L0 | SPEC | WHPBU-131308N | 440 | 15 | 0.32 ± 9.4% | 35 | 25 | 45 |
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WHPBU-131308N-R32L0 | SPEC | WHPBU-131308N | 320 | 15 | 0.32 ± 9.4% | 50 | 35 | 45 |
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WHPBU-131308N-R26L0 | SPEC | WHPBU-131308N | 260 | 15 | 0.32 ± 9.4% | 60 | 45 | 45 |
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WHPBU-131308N-R21L0 | SPEC | WHPBU-131308N | 210 | 15 | 0.32 ± 9.4% | 70 | 55 | 45 |
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WHPBU-131308N-R11K0 | SPEC | WHPBU-131308N | 110 | 10 | 0.32 ± 9.4% | 120 | 105 | 45 |
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By series
Series differ in body size, which sets DC resistance and how much current each phase carries.
Series overview
WHPBU-131308N power bead inductors cover a wide inductance span for multiphase buck converters, from 110 nH (WHPBU-131308N-R11K0) to 500 nH (WHPBU-131308N-R50L0). They are also listed as high current power inductors or power chokes for VRMs. Every value is rated 0.32 mΩ ±9.4% DCR and 45 A heating current. Compare the WHPBU-100710N power beads for lower DCR and the WHPBU-150705N parts for low values.
WHPBU-131308N-R11K0 opens the range at 110 nH, followed by WHPBU-131308N-R21L0 at 210 nH and WHPBU-131308N-R26L0 at 260 nH, up to WHPBU-131308N-R50L0 at 500 nH. One series can therefore serve rails with quite different phase counts.
WHPBU-131308N-R11K0 is listed at 120 A at 25 °C and 105 A at 100 °C, for rails with large load steps. At 500 nH, WHPBU-131308N-R50L0 drops to 28 A and 23 A.
WHPBU-131308N-R11K0 has ±10% tolerance, while parts such as WHPBU-131308N-R32L0 are listed at ±15%. A tighter tolerance narrows the ripple spread between phases, which pays off in a low-inductance, high-frequency multiphase VRM.
Heating current is 45 A on every part. From WHPBU-131308N-R32L0 to WHPBU-131308N-R50L0, hot saturation of 35 A down to 23 A falls below it, so peak current, not temperature rise, sets the limit there.
Open the High Current Power Bead Inductors selection guide →
Applications
The wide span lets one series serve several rails on the same board.
A CPU VRM or FPGA core rail sees fast, large load steps. WHPBU-131308N-R11K0 keeps 105 A of hot saturation for those peaks, while its 45 A heating current covers the steady load per phase.
Server boards run CPU, memory and I/O rails at different phase counts. WHPBU-131308N-R21L0 on a fast rail and WHPBU-131308N-R44L0 on a slower one keep one power bead family in the BOM.
A multiphase VRM that switches slower to save switching loss needs more inductance per phase. WHPBU-131308N-R32L0 to WHPBU-131308N-R50L0 cover 320–500 nH there; keep peaks under their 35 A to 23 A hot saturation figures.
Documents
Search a full part number, such as WHPBU-131308N-R26L0, to open its datasheet and check outline, tolerance and current ratings before layout.
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 this power bead inductor series in its own magnetics factory in Mianyang. A datasheet is published for each WHPBU-131308N part number; 3D models and PCB footprints are not, so allow time to 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, send the part numbers, quantity per board and expected volume; typical lead time is 7–10 days.
If your design uses another maker’s power bead inductor, send its part number and datasheet. Our FAE team compares inductance, DCR, saturation and heating current, and outline, then suggests WHPBU-131308N 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 WHPBU-131308N series is made alongside VOOHU’s other power beads and molded power inductors in Mianyang.
FAQ
Supply, values for fast rails and where the footprint comes from.
It combines the widest inductance range in the family, 110 to 500 nanohenries, with the highest hot saturation figure at around 105 amps. That suits designs where transient peaks are the binding constraint, or where one series needs to cover several different rails.
Heating current is 45 amps, between the 31 amps of the 100705N and the 70 amps of the 100710N. So it carries more continuous current than the smallest series but less than the lowest-resistance one, while offering higher peak capability than either.
When the load has large fast transients, as on processor and FPGA rails. The hot saturation figure sets how much instantaneous current a phase survives without the inductance collapsing. On a steady high load, DC resistance and heating current matter more.
More board area per phase and more spacing to plan between phases. On a dense multiphase stage that can force a different arrangement of the power stage. Check the land pattern and the phase-to-phase clearance early, then verify current sharing on the real 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 phase count, per-phase RMS and peak current, switching frequency and the board area available per phase.
Yes. VOOHU manufactures WHPBU-131308N power bead inductors in its own magnetics factory in Mianyang, China, together with its other WHPBU series. Each part number, from WHPBU-131308N-R11K0 to WHPBU-131308N-R50L0, has its own datasheet in the downloads.
The low end: WHPBU-131308N-R11K0 at 110 nH or WHPBU-131308N-R21L0 at 210 nH. Higher switching frequency needs less inductance for the same ripple, and these values carry 105 A and 55 A respectively at 100 °C.
The downloads hold the datasheet for each part number but no PCB footprint or 3D model. Draw the land pattern from the outline drawing in the datasheet, and send it to our FAE team for a check if needed.
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.
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