Is there a pin-compatible replacement for 1239AS-H-100M=P2?

Murata DFE252010F-100M=P2 shares the same 2520 package dimensions and can be considered form-fit compatible. However, its electrical characteristics differ, so it is not a direct drop-in and requires engineering validation.

What risks should I check before replacing 1239AS-H-100M=P2?

Key risks include package size mismatch requiring a new PCB layout, increased DC resistance (DCR) causing higher power loss, and lower current ratings (Isat or Itemp) which could lead to saturation or overheating under load.

1239AS-H-100M=P2 Alternatives, Datasheet & Cross Reference | Murata Manufacturing Co., Ltd.

Finding a replacement for the Murata 1239AS-H-100M=P2 10µH inductor involves balancing package size with electrical performance. Alternatives exist with similar or better current ratings, but may require board layout changes.

AI replacement insight

Package riskhigh

Most electrically superior alternatives are in larger packages, requiring a PCB redesign.

Electrical riskmedium

The only form-fit option has weaker DCR and current specs, which could impact efficiency and reliability.

Can it be replaced directly?

No direct drop-in replacement has been identified. The closest form-fit candidate, DFE252010F-100M=P2, has a higher DCR and lower temperature-rise current, which must be validated in your application.

Best replacement path

If PCB space allows, DFE322512F-100M=P2 offers a clear electrical upgrade. If the 2520 footprint is fixed, DFE252010F-100M=P2 is a possibility but with performance trade-offs.

Main risk

The primary risk is balancing a matching 2520 package against performance degradation (higher DCR, lower current) or accepting a larger package for improved electricals.

Recommended alternatives

Form-fit compatible package but with higher DCR and lower current rating; requires circuit validation.

View details

Alternative comparison matrix

Feature / factor	1239AS-H-100M=P2	DFE252010F-100M=P2	DFE322512F-100M=P2	SRP4020TA-100M	Compatibility / risk
Package	2520	2520 (1008)	1210 (3225 metric)	4020	2520 (1008) / 1210 (3225 metric) / 4020 — Same footprint (2.5x2.0mm), slightly lower profile (1.0mm vs 1.2mm).; DFE322512F-100M=P2: Larger footprint (3.2x2.5mm) requires PCB redesign.; SRP4020TA-100M: Significantly larger footprint (~4.0x4.0mm) requires PCB redesign.
Inductance	10µH	10µH	10µH	10µH	10µH — matched; DFE322512F-100M=P2: matched; SRP4020TA-100M: matched
Dcr	0.46Ω	0.6Ω	0.324Ω	0.243Ω	0.6Ω / 0.324Ω / 0.243Ω — Higher DCR will increase power loss.; DFE322512F-100M=P2: Lower DCR improves efficiency.; SRP4020TA-100M: Much lower DCR significantly improves efficiency.
Current	1.0A	0.9A	1.1A / 1.7A	1.8A / 2.3A	0.9A / 1.1A / 1.7A / 1.8A / 2.3A — Lower temperature-rise current (Itemp).; DFE322512F-100M=P2: Higher temp-rise (Itemp) and saturation (Isat) currents.; SRP4020TA-100M: Significantly higher current ratings (Itemp and Isat).
Saturation Current	~1.1A	1.3A	-	-	1.3A — Higher saturation current (Isat).
Qualification	Standard	-	-	AEC-Q200	AEC-Q200 — Automotive qualified.

Application & sourcing insights

Questions & answers

For electrical performance, Bourns SRP4020TA-100M is a strong upgrade but in a larger package. For a similar footprint, Murata DFE252010F-100M=P2 is an option, but has higher DCR and lower current rating, requiring careful review.