Is there a pin-compatible replacement for C42Q2104K4SC000?

Several candidates have the correct 2-pin radial configuration and 15mm lead pitch, but a full pin-to-pin compatibility check requires datasheet verification of all case dimensions. C42Q2104K6SC000 is the most likely to be pin-compatible.

What risks should I check before replacing C42Q2104K4SC000?

First, verify the case dimensions and lead pitch (15mm) match your PCB layout. Second, ensure the replacement has a Class X2 or X1 safety rating and a voltage rating of at least 305VAC. Do not use a general-purpose or lower-voltage capacitor.

C42Q2104K4SC000 Alternatives, Datasheet & Cross Reference | NI

C42Q2104K4SC000 is a 0.1µF, 305VAC Class X2 safety capacitor from FARATRONIC, used for AC line interference suppression. Finding a replacement requires matching capacitance, safety class, voltage rating, and the 15mm lead pitch.

AI replacement insight

Package riskmedium

Lead pitch and case dimensions must be verified for PCB compatibility.

Electrical risklow

Many candidates match key electricals, but downgrades must be avoided.

Sourcing risklow

This is a common capacitor value with multiple sources available.

Can it be replaced directly?

No drop-in replacement has been fully verified. However, C42Q2104K6SC000 is a very strong candidate with identical electrical specs, requiring only physical package confirmation.

Best replacement path

The best path is finding another Class X2 capacitor with 0.1µF, ≥305VAC, and a 15mm lead pitch. C42Q2104K6SC000 from the same manufacturer is a strong candidate pending physical verification.

Main risk

The main risks are physical incompatibility (lead pitch, case size) and using a part with a lower voltage rating or incorrect safety class.

Recommended alternatives

A strong functional alternative from the same manufacturer with matching electrical specifications. Physical fit should be verified.

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Alternative comparison matrix

Feature / factor	C42Q2104K4SC000	C42Q2104K6SC000	MP1104K44D2R8LC	Compatibility / risk
Capacitance	0.1µF	0.1µF	0.1µF	0.1µF — Exact match.; MP1104K44D2R8LC: Exact match.
Voltage	305VAC	305VAC	440VAC	305VAC / 440VAC — Exact match.; MP1104K44D2R8LC: Higher voltage rating provides more margin.
Application	Class X2	Class X2	Class X1	Class X2 / Class X1 — Exact match.; MP1104K44D2R8LC: Higher safety rating (X1 > X2).
Package	Radial, 15mm Pitch	Radial Box, 15mm Pitch	Radial, 15mm Pitch	Radial Box, 15mm Pitch / Radial, 15mm Pitch — Appears to match target's 15mm pitch, but requires dimensional verification.; MP1104K44D2R8LC: Appears to match target's 15mm pitch, but requires dimensional verification.

Application & sourcing insights

Questions & answers

C42Q2104K6SC000 is a strong candidate with matching electrical specs from the same manufacturer. For an upgrade, MP1104K44D2R8LC offers a higher voltage and safety rating. Both require physical verification.