
KYET
A potential pin-compatible X2 safety capacitor with matching capacitance, tolerance, and package pitch.
Finding a replacement for the KNSCHA MPX105K31E3KN15800 1µF 275VAC X2 safety capacitor involves matching capacitance, voltage, safety ratings, and the 22.5mm lead pitch. Several alternatives exist, but require careful verification.
Many alternatives have incorrect lead pitch; verification is critical.
Ensure any replacement is X2 safety rated for at least 275VAC.
Direct replacement for MPX105K31E3KN15800 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Start with Datasheet verified or Strong match candidates for MPX105K31E3KN15800, then review parametric alternatives for package and electrical fit.
The main risk is package incompatibility. While some parts match electrically, their physical dimensions, especially lead pitch, may differ.

KYET
A potential pin-compatible X2 safety capacitor with matching capacitance, tolerance, and package pitch.
| Feature / factor | MPX105K31E3KN15800 | PX105K2C2202 | PX105K2C1503 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | Radial, 22.5mm Pitch | Radial, 22.5mm Lead Pitch | Radial, 15mm Lead Pitch | Radial, 22.5mm Lead Pitch / Radial, 15mm Lead Pitch — Package and lead pitch match target.; PX105K2C1503: Lead pitch does not match, requires board modification. | |
| Voltage | 275VAC | 310VAC | 310VAC | 310VAC — Higher AC voltage rating provides more margin.; PX105K2C1503: Higher AC voltage rating is acceptable. | |
| Capacitance | 1uF | 1uF | 1uF | 1uF — matched; PX105K2C1503: matched | |
| Tolerance | ±10% | ±10% | - | ±10% — matched | |
| Application | X2 | X2 | X2 | X2 — Matches required safety class.; PX105K2C1503: Matches required safety class. |
Verified drop-in options for MPX105K31E3KN15800 are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.