Pump capacitor fitment

Bianco SB4-2/20-1.1 WF-KIT Capacitor

The Bianco SB4-2/20-1.1 WF-KIT is a 1.1 kW single-phase 4-inch submersible borehole pump commonly found in well & domestic pumps setups. Its motor runs on a 30µF 450V motor-run capacitor in a CBB60-style can: here's the exact replacement and how to confirm it.

Check your kit suffix first. The Bianco SB4 is built as an OF-KIT and a WF-KIT version, and the two take different capacitors. Match the µF printed on your own capacitor before ordering: if it differs from the value on this page, go by your capacitor, or ask us.

Pump type: 4-inch submersible borehole pump
Motor: 1.1 kW · single-phase
Run capacitor: 30µF · 450V · CBB60
Application: Well & domestic pumps
Also sold as: SB4-2/20-1.1-WF-KIT
Fitment source: Manufacturer-documented, our pump-spares records

Manufacturer-documented30µF · 450V

The Bianco SB4-2/20-1.1 WF-KIT 4-inch submersible borehole pump uses a 30µF 450V motor-run capacitor (CBB60-style): it's the part that helps the single-phase motor start and keep running smoothly. We source this value from our pump-spares records. Match the replacement to 30µF (about 27-33µF) at 450V or higher; the checklist below covers how to confirm it against your own capacitor.

How to be sure you get the right one

µF must match: the SB4-2/20-1.1 WF-KIT needs 30µF (about 27-33µF), within ±5% of the label. Too low and the motor won't start; too high and it runs hot.
Voltage can go up, never down: a 450V (or higher) cap is correct here; a 450V part safely replaces a 370V or 440V one. Don't fit below 450V.
Check the terminal + size: make sure the new cap physically fits the housing and the connections match (or use a spade adapter).
When in doubt, read your old cap: the printed µF and voltage on the part you're replacing is the final word.

Common questions - Bianco SB4-2/20-1.1 WF-KIT capacitor

What capacitor does the Bianco SB4-2/20-1.1 WF-KIT use?

A 30µF 450V motor-run capacitor (CBB60-style). Always confirm against the rating printed on your existing capacitor before ordering.

Can I fit a higher-voltage capacitor in the Bianco SB4-2/20-1.1 WF-KIT?

Yes, voltage can be equal or higher, never lower. A capacitor rated 450V or above is fine (450V is the usual choice), as long as the µF still matches (30µF).

Other Bianco pump capacitors

Replacing the capacitor on a different Bianco? These models have a confirmed or documented fitment too:

Browsing rather than replacing? All well & domestic pumps capacitors · Pump capacitor guide

Spotted a mistake, or want to confirm this fits your exact unit? Tell us. We read every message and reply within a working day.