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Pump capacitor fitment

Bianco SB4-6/14-1.5 Capacitor

The Bianco SB4-6/14-1.5 is a 1.5 kW single-phase 4-inch submersible borehole pump commonly found in well & domestic pumps setups. Its motor runs on a 55µF 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
1.5 kW · single-phase
Run capacitor
55µF · 450V · CBB60
Application
Well & domestic pumps
Also sold as
SB4-6/14-1.5-OF-KIT
Fitment source
Manufacturer-documented, our pump-spares records
Manufacturer-documented55µF · 450V

The Bianco SB4-6/14-1.5 4-inch submersible borehole pump uses a 55µF 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 55µF (about 49.5-60.5µF) at 450V or higher; the checklist below covers how to confirm it against your own capacitor.

Other Bianco SB4-6/14-1.5 sizes:

How to be sure you get the right one

  • µF must match: the SB4-6/14-1.5 needs 55µF (about 49.5-60.5µF), 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 SB4-6/14-1.5 capacitor

What capacitor does the Bianco SB4-6/14-1.5 use?

A 55µF 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 SB4-6/14-1.5?

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 (55µF).

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.