What “450VAC 50/60Hz 25/70/21” means
A CBB60 label prints the whole rating. Line by line:
- µF (or MFD): the capacitance, with a tolerance such as ±5%. This is the number that has to match.
- 450VAC: the maximum AC working voltage. The same or higher is fine, never lower.
- 50/60Hz: rated for either mains frequency. New Zealand mains is 50Hz.
- 25/70/21: the climatic category: −25°C lowest operating temperature, +70°C highest, 21 days damp-heat test. 40/70/21 means −40°C to +70°C. It doesn't change the electrical match.
Every CBB60 we list is rated 450VAC, 50/60 Hz, ±5%. Reading a CBB60 label line by line.
Typical run-capacitor values by appliance
Typical ranges, not a fitment guarantee: the value on your own capacitor always wins.
| Appliance | Typical run capacitor |
|---|---|
| Pool & spa pumps | 15-60µF · 370/450V |
| HVAC & heat pumps | 5-80µF · 370/440V |
| Well & domestic pumps | 8-70µF · 450V |
| Washing machines | 8-16µF · 450V |
| Garage door openers | 6-10µF · 450V |
| Fans & extractors | 1.5-6µF · 450V |
| Compressors & air tools | 25-80µF · 370/450V |
Know the pump? The capacitor finder lists documented values by brand and model, and pump capacitors walks through the job.
Need a start capacitor instead?
If your old capacitor is marked CD60, rated around 250VAC with a large µF (often a range), it's a start capacitor, not a CBB60. CD60 motor start capacitors, 50-500µF.
Before you order
- CBB60 vs CBB65 vs CD60: which capacitor do I need?
- CBB60 vs CBB61
- Can I use a higher µF or voltage capacitor?
- Not sure of the µF? Use the find-my-part wizard
CBB60 capacitor FAQ
What does "450VAC 50/60Hz 25/70/21" on a CBB60 label mean?
450VAC is the maximum AC working voltage. 50/60Hz means the capacitor is rated for either mains frequency (New Zealand mains is 50Hz). 25/70/21 is the climatic category: a lowest operating temperature of −25°C, a highest of +70°C, and 21 days of damp-heat testing. A label reading 40/70/21 differs only in the lowest temperature, −40°C. The climatic category doesn't change the electrical match: the µF, voltage and terminals do.
Can I use a 450V CBB60 to replace a 370V, 400V or 440V capacitor?
Yes. The voltage rating is a maximum, so the same or higher is fine, never lower. A 450V capacitor replaces a 370V, 400V or 440V original as long as the µF is the same.
How close does the µF have to be?
Match the µF printed on your old capacitor; within ±5% is fine. Don't round up to the next value we list: too low and the motor struggles to start, too high and it runs hot.
Which terminal do I need?
Match how your old capacitor connects. Lug Terminal: 6.3mm quick-connect male tabs that take push-on female spade receptacles. No soldering, just push on. Core Lead: a central threaded stud for bracket mounting plus lead-out wires. The terminal style doesn't change the electrical match, only how it wires in.
How much does a CBB60 capacitor cost?
Our 24 CBB60 run capacitors (4-80µF, 450VAC) start from $24.95 NZD. The price depends on the µF and the terminal; the grid above shows each one.
Is a CBB60 the same as a CBB61, CBB65 or CD60?
No. CBB61 is a flat rectangular fan capacitor and CBB65 is a round metal-can run capacitor; we don't stock either. CD60 is an electrolytic start capacitor, built for a second or two at start-up. It never replaces a run capacitor, and a CBB60 never replaces a start capacitor.