Is there a pin-compatible replacement for MPB105J2WD4KN1580S?

No pin-compatible replacements were found in this review. All functional candidates have a different lead pitch, which prevents them from being a drop-in, pin-to-pin substitute.

What risks should I check before replacing MPB105J2WD4KN1580S?

Key risks include: 1) Package mismatch, specifically the lead pitch. 2) Weaker tolerance (e.g., ±10% vs ±5%). 3) Verifying the DC voltage rating of AC-rated safety capacitors to ensure it meets the 450V requirement.

MPB105J2WD4KN1580S Alternatives, Datasheet & Cross Reference | KNSCHA

KNSCHA MPB105J2WD4KN1580S is a 1µF 450V radial film capacitor with a 15mm lead pitch. Finding a direct drop-in replacement is challenging due to its specific package and high voltage rating.

AI replacement insight

Package riskhigh

Different lead pitch requires board redesign.

Electrical riskmedium

Wider tolerance and unverified DC voltage rating.

Can it be replaced directly?

No direct replacements were identified in this review.

Best replacement path

Functional alternate requiring board modification.

Main risk

Package mismatch (lead pitch) prevents drop-in replacement.

Recommended alternatives

A functional alternative from the same manufacturer family, but with a different package lead pitch.

View details

Alternative comparison matrix

Feature / factor	MPB105J2WD4KN1580S	MPX105K31E3KN15800	PX105K2C2202	Compatibility / risk
Package	Radial, 15mm Pitch	Radial, 22.5mm Pitch	Radial, 22.5mm Lead Pitch	Radial, 22.5mm Pitch / Radial, 22.5mm Lead Pitch — Not a drop-in replacement.; PX105K2C2202: Not a drop-in replacement.
Voltage	450VDC	310VAC (X2 Safety)	310VAC (X2 Safety)	310VAC (X2 Safety) — DC rating needs verification but likely sufficient.; PX105K2C2202: DC rating needs verification but likely sufficient.
Tolerance	±5%	±10%	±10%	±10% — Wider tolerance may affect circuit performance.; PX105K2C2202: Wider tolerance may affect circuit performance.
Dielectric	Polypropylene (PP)	Polypropylene (X2)	Polypropylene (MKP)	Polypropylene (X2) / Polypropylene (MKP) — Matches target's functional type.; PX105K2C2202: Matches target's functional type.

Application & sourcing insights

Questions & answers

There are no direct drop-in replacements among the candidates reviewed. Parts like KNSCHA MPX105K31E3KN15800 are functional alternatives but require board layout changes due to a different lead pitch (22.5mm vs 15mm) and have a wider tolerance.