Capacitor Information Guide
Voltage Rating
The voltage rating of a capacitor is the maximum voltage it can safely handle. Exceeding this rating can cause the capacitor to fail or rupture. Always choose a capacitor with a higher voltage rating than the voltage in your system.
Capacitance (µF / mF)
The µF (microfarad) or mF (millifarad) value indicates the capacitor’s capacitance — how much electrical charge it can store.
Higher capacitance = more stored charge
Always replace capacitors like‑for‑like
Using the wrong µF rating can damage motors or reduce performance
Capacitor Types We Stock
Spade‑Connector Capacitors
Two U‑type terminals
Four spade connection points for flexible wiring
Bipolar design — can be connected in either orientation
Pre‑Wired Capacitors
Ready to install
Ideal for quick replacements
Most capacitors we supply are rated to 450 VAC and suitable for 50/60 Hz applications.
Climatic Categories
Capacitors are tested to withstand specific environmental conditions. Common climatic categories include:
| Category | Meaning |
|---|---|
| 25/70/21 | –25°C to +70°C, 21 days damp‑heat test |
| 25/85/21 | –25°C to +85°C, 21 days damp‑heat test |
| 40/85/21 | –40°C to +85°C, 21 days damp‑heat test |
These differences usually do not affect normal use, unless the capacitor is installed in extreme or harsh environments.
