Is there a pin-compatible replacement for 400CXW100MEFR16X31.5?

No pin-compatible replacement is confirmed. Candidates like EWH2GM101M25OT match electrically but have different physical dimensions (18x25mm vs 16x31.5mm) requiring a layout check.

What risks should I check before replacing 400CXW100MEFR16X31.5?

Primarily, verify the substitute's physical dimensions (diameter and length) fit your PCB layout. Also, confirm that any minor differences in capacitance or secondary parameters like ripple current are acceptable for your application.

400CXW100MEFR16X31.5 Alternatives, Datasheet & Cross Reference | rubycon

Reviewing alternatives for the Rubycon 400CXW100MEFR16X31.5, a 100µF 400V radial capacitor. Key considerations for substitutes include physical dimensions, capacitance tolerance, and voltage rating.

AI replacement insight

Package riskhigh

Most alternatives have a different diameter or length, requiring layout verification.

Electrical risklow

Many candidates match or exceed key electrical ratings (capacitance, voltage).

Can it be replaced directly?

No direct pin-to-pin, drop-in replacement has been identified. All candidates require review of physical dimensions or electrical parameters.

Best replacement path

Candidates with matching 100µF/400V ratings exist, but physical size (diameter, length) is the most common variation and requires verification.

Main risk

Package risk is the primary concern. Several candidates have a larger diameter, which may not fit on the PCB.

Recommended alternatives

A low-impedance alternative with matching electricals but different physical dimensions requiring a layout check.

View details

Alternative comparison matrix

Feature / factor	400CXW100MEFR16X31.5	ERH2GM101M25OT	EWH2GM101M25OT	450CXW120MEFR18X31.5	Compatibility / risk
Capacitance	100 µF	100 µF	100 µF	120 µF	100 µF / 120 µF — Capacitance matches target.; EWH2GM101M25OT: Capacitance matches target.; 450CXW120MEFR18X31.5: 20% higher capacitance, may affect timing circuits.
Voltage	400 V	400 V	400 V	450 V	400 V / 450 V — Voltage rating matches target.; EWH2GM101M25OT: Voltage rating matches target.; 450CXW120MEFR18X31.5: Higher voltage rating is a safe upgrade.
Package	16mm x 31.5mm	18mm x 25mm	18mm x 25mm	18mm x 31.5mm	18mm x 25mm / 18mm x 31.5mm — Larger diameter (18mm) and shorter length (25mm). Verify fit.; EWH2GM101M25OT: Larger diameter (18mm) and shorter length (25mm). Verify fit.; 450CXW120MEFR18X31.5: Diameter is 2mm larger, requires board space verification.
Series	CXW	RH (Low Z)	-	CXW	RH (Low Z) / CXW — Different series (low impedance), may offer better performance.; 450CXW120MEFR18X31.5: Same manufacturer series, suggests similar performance profile.

Application & sourcing insights

Questions & answers

KCXL4502W101MF offers an upgraded 450V rating with the same 100µF capacitance, but its physical dimensions must be verified from the datasheet before use.