Is there a pin-compatible replacement for ERK2HM4R7F12OT?

Several parts like AISHI's EGW2WM4R7F12C35T have the same package and pinout but fail on the critical 500V rating. They are not safely pin-compatible without verifying the circuit's actual operating voltage is well below 450V.

What risks should I check before replacing ERK2HM4R7F12OT?

The most critical risk is the voltage rating; the replacement must be rated for at least 500V. Also verify capacitance (4.7µF), tolerance (±20%), physical dimensions (8x12mm), lead spacing, and secondary parameters like ESR and ripple current for your application.

ERK2HM4R7F12OT Alternatives, Datasheet & Cross Reference | AISHI

AISHI ERK2HM4R7F12OT is a 4.7µF 500V radial aluminum electrolytic capacitor in an 8x12mm package. Finding a direct replacement requires careful matching of its high voltage rating, capacitance, and physical size.

AI replacement insight

Electrical riskhigh

All presented alternatives have a lower voltage rating than the target's 500V.

Package risklow

Several candidates match the 8x12mm radial package, ensuring physical compatibility.

Can it be replaced directly?

No direct, drop-in replacements were found. Several candidates match the form-fit and capacitance but have lower voltage ratings (400-450V vs 500V), posing a significant risk.

Best replacement path

Search for 4.7µF radial electrolytic capacitors with a voltage rating of 500V or higher and an 8x12mm package size.

Main risk

The primary risk is using a substitute with a lower voltage rating, which can lead to component failure, especially in high-voltage applications.

Recommended alternatives

Matches form-fit and capacitance but has a lower 450V rating, posing a risk.

View details

Alternative comparison matrix

Feature / factor	ERK2HM4R7F12OT	EGM2WM4R7F12OT	EGW2WM4R7F12C35T	EGW2GM4R7F12OT	Compatibility / risk
Package	Radial, 8mm x 12mm	Radial, 8mm x 12mm	Radial, 8mm x 12mm	Radial, 8mm x 12mm	Radial, 8mm x 12mm — Identical case size and lead type.; EGW2WM4R7F12C35T: Identical case size and lead type.; EGW2GM4R7F12OT: Identical case size and lead type.
Voltage	500V	450V	450V	400V	450V / 400V — Candidate voltage is lower than target.; EGW2WM4R7F12C35T: Candidate voltage is lower than target.; EGW2GM4R7F12OT: Candidate voltage is significantly lower.
Capacitance	4.7µF	4.7µF	4.7µF	4.7µF	4.7µF — matched; EGW2WM4R7F12C35T: matched; EGW2GM4R7F12OT: matched
Endurance	2000h @ 105°C	3000h @ 105°C	10000h @ 105°C	10000h @ 105°C	3000h @ 105°C / 10000h @ 105°C — Candidate has longer rated life.; EGW2WM4R7F12C35T: Candidate has significantly longer rated life.; EGW2GM4R7F12OT: Candidate has significantly longer rated life.

Application & sourcing insights

Questions & answers

Currently, no ideal alternatives are listed. The closest options have a lower voltage rating (400-450V), which is a significant downgrade. The best approach is to find a 4.7µF capacitor with a 500V or higher rating in the same 8x12mm radial package.