Is there a pin-compatible replacement for ERS1KM151G20OT?

No direct pin-compatible replacement with identical key parameters was identified. ECF1IM101G20OTPO is form-fit compatible (same size and pin type) but its capacitance is lower, requiring circuit validation.

What risks should I check before replacing ERS1KM151G20OT?

Before replacing, check two main risks: 1) Physical fit, as some alternatives are larger and won't fit the original PCB layout. 2) Capacitance value, as a lower value can impact circuit performance like filtering or timing.

ERS1KM151G20OT Alternatives, Datasheet & Cross Reference | AISHI

ERS1KM151G20OT is a 150µF 100V radial aluminum electrolytic capacitor in a 10x20mm package. Finding a substitute requires careful matching of these key parameters, as alternatives may differ in size or capacitance.

AI replacement insight

Package riskmedium

Several candidates are larger or have different mounting styles, requiring PCB layout changes.

Electrical riskmedium

Some candidates have lower capacitance, which can affect circuit timing, filtering, or stability.

Can it be replaced directly?

No direct drop-in replacement with identical key parameters was found. All viable candidates require some level of engineering review.

Best replacement path

The best path depends on design constraints. For electrical performance, ERD157M2CI25RR is ideal if the larger size is acceptable. If board space is fixed, ECF1IM101G20OTPO is a physical fit but requires validating the lower capacitance.

Main risk

The primary risks are physical incompatibility due to different package sizes and functional failure from incorrect capacitance.

Recommended alternatives

Form-fit match with identical package, but lower capacitance (100µF) requires engineering validation.

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Alternative comparison matrix

Feature / factor	ERS1KM151G20OT	ECF1IM101G20OTPO	ERD157M2CI25RR	Compatibility / risk
Package	Radial, 10mm x 20mm	Radial, 10mm x 20mm	Radial, 12.5mm x 25mm	Radial, 10mm x 20mm / Radial, 12.5mm x 25mm — Identical package dimensions and lead type.; ERD157M2CI25RR: Candidate is physically larger.
Capacitance	150µF	100µF	150µF	100µF / 150µF — Candidate capacitance is 33% lower.; ERD157M2CI25RR: Capacitance is an exact match.
Voltage	100V	120V	160V	120V / 160V — Higher voltage rating provides more margin.; ERD157M2CI25RR: Higher voltage rating provides more margin.
Tolerance	±20%	±20%	±20%	±20% — Tolerance matches the target part.; ERD157M2CI25RR: Tolerance matches the target part.

Application & sourcing insights

Questions & answers

The best alternative depends on your design flexibility. ERD157M2CI25RR is a strong electrical match but is physically larger. ECF1IM101G20OTPO fits the same footprint but has lower capacitance (100µF vs 150µF).