
AISHI
An excellent upgrade with a higher voltage rating and significantly longer life in the same package.
Finding a replacement for the CX KM227M025F12RR0VH2FP0, a 220µF 25V radial aluminum capacitor, involves matching key electrical parameters and physical dimensions. Several alternatives exist, from direct upgrades to functional alternates requiring design review.
Mismatched capacitance or ESR (from polymer caps) can cause circuit malfunction or instability.
Selecting an SMD part instead of a radial part will require a PCB redesign.
Multiple vendors produce capacitors with similar specifications, offering good availability.
Yes, the AISHI ERJ1VM221F12OT is a strong candidate for direct replacement, providing superior voltage and endurance ratings in an identical package.
The AISHI ERJ1VM221F12OT is the best upgrade path, offering a higher voltage rating (35V) and significantly longer life (10,000 hours) in the same 8x12mm radial package.
The main risks involve selecting a part with mismatched capacitance, different capacitor technology (e.g., polymer vs. electrolytic), or an incorrect package type (SMD vs. radial).

AISHI
An excellent upgrade with a higher voltage rating and significantly longer life in the same package.
| Feature / factor | KM227M025F12RR0VH2FP0 | ERJ1VM221F12OT | EWH1EM331F12OT | ERS1VM151F12OT | Compatibility / risk |
|---|---|---|---|---|---|
| Package | Radial, 8mm x 12mm | Radial, 8mm x 12mm | Radial, 8mm x 12mm | Radial, 8mm x 12mm | Radial, 8mm x 12mm — Identical form factor.; EWH1EM331F12OT: Identical form factor.; ERS1VM151F12OT: Identical form factor.; 2210350812R00: Identical form factor. |
| Capacitance | 220.0µF | 220.0µF | 330µF | 150µF | 220.0µF / 330µF / 150µF — Nominal capacitance matches.; EWH1EM331F12OT: 50% higher capacitance may affect timing or inrush current.; ERS1VM151F12OT: 32% lower capacitance is a downgrade and may cause issues. |
| Voltage | 25V | 35V | 25V | 35V | 35V / 25V — Higher voltage rating provides more safety margin.; EWH1EM331F12OT: Voltage rating matches.; ERS1VM151F12OT: Higher voltage rating is an upgrade.; 2210350812R00: Higher voltage rating is an upgrade. |
| Endurance | 2000 hrs @ 105°C | 10000 hrs @ 105°C | 2000 hrs @ 105°C | 7000 hrs @ 105°C | 10000 hrs @ 105°C / 2000 hrs @ 105°C / 7000 hrs @ 105°C — Significantly longer operational life.; EWH1EM331F12OT: Endurance matches.; ERS1VM151F12OT: Longer operational life. |
| Technology | Standard Aluminum Electrolytic | - | - | - | Conductive Polymer — Polymer caps have much lower ESR, which can cause instability. |
| Esr | Unknown (typically >100mΩ) | - | - | - | 35mΩ — Significantly lower ESR requires circuit stability analysis. |
The AISHI ERJ1VM221F12OT is an excellent upgrade, with a higher 35V rating and 10,000-hour life. It matches the 220µF capacitance and radial 8x12mm package.