
AISHI
Strong candidate from the same series; requires datasheet review to confirm endurance rating matches the target.
Finding a substitute for the AISHI EGW2GM4R7F12OT, a 4.7µF 400V long-life aluminum electrolytic capacitor, requires careful matching of its 10,000-hour endurance and 8x12mm radial package.
Many alternatives have a much shorter endurance rating (2-3k hours vs 10k hours).
Some functional alternatives have a larger physical size, requiring PCB changes.
No verified direct drop-in replacement is available. Candidates exist with similar form and function, but require verification of endurance rating or accept a shorter operational life.
The closest option is EGW2WM4R7F12C35T from the same manufacturer series, but its endurance rating must be confirmed from the datasheet. Functional alternatives like Rubycon's 400BXC4R7MEFC10X12.5 offer similar electrical performance but require PCB layout changes.
The primary risk is substituting a capacitor with a significantly shorter endurance (lifetime), which could lead to premature failure in applications requiring high reliability.

AISHI
Strong candidate from the same series; requires datasheet review to confirm endurance rating matches the target.
| Feature / factor | EGW2GM4R7F12OT | EGW2WM4R7F12C35T | EGM2WM4R7F12OT | ERK2HM4R7F12OT | Compatibility / risk |
|---|---|---|---|---|---|
| Package | Radial, 8mm x 12mm | Radial, 8mm x 12mm | Radial, 8mm x 12mm | Radial, 8mm x 12mm | Radial, 8mm x 12mm — Physical dimensions and lead spacing appear to match.; EGM2WM4R7F12OT: Physical dimensions and lead spacing match.; ERK2HM4R7F12OT: Physical dimensions and lead spacing match. |
| Voltage | 400V | 450V | 450V | 500V | 450V / 500V — Higher voltage rating is a safe upgrade.; EGM2WM4R7F12OT: Higher voltage rating is a safe upgrade.; ERK2HM4R7F12OT: Higher voltage rating is a safe upgrade. |
| Capacitance | 4.7µF, ±20% | 4.7µF, ±20% | 4.7µF, ±20% | 4.7µF, ±20% | 4.7µF, ±20% — Capacitance and tolerance match.; EGM2WM4R7F12OT: Capacitance and tolerance match.; ERK2HM4R7F12OT: Capacitance and tolerance match. |
| Endurance | 10000h @ 105°C | Unknown | 3000h @ 105°C | 2000h @ 105°C | Unknown / 3000h @ 105°C / 2000h @ 105°C — Endurance is not specified and must be verified from datasheet.; EGM2WM4R7F12OT: Significantly shorter lifetime is a major reliability risk.; ERK2HM4R7F12OT: Significantly shorter lifetime is a major reliability risk. |
The best potential alternative is EGW2WM4R7F12C35T, which is from the same AISHI series and has a higher voltage rating. However, you must verify its endurance rating from the datasheet to ensure it meets the 10,000-hour life of the original part.