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Pump capacitor fitment

Bianco SB4-4/14-1.1 Capacitor

The Bianco SB4-4/14-1.1 is a 1.1 kW single-phase 4-inch submersible borehole pump commonly found in well & domestic pumps setups. Its motor runs on a 45µF 450V motor-run capacitor in a CBB60-style can — here's the exact replacement and how to confirm it.

Pump type
4-inch submersible borehole pump
Motor
1.1 kW · single-phase
Run capacitor
45µF · 450V · CBB60
Application
Well & domestic pumps
Also sold as
SB4-4/14-1.1-OF-KIT, SB4-4/14-1.1-WF-KIT
Fitment source
Manufacturer-documented — our pump-spares records
Manufacturer-documented45µF · 450V

The Bianco SB4-4/14-1.1 4-inch submersible borehole pump uses a 45µF 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 45µF (about 40.5–49.5µF) at 450V or higher; the checklist below covers how to confirm it against your own capacitor.

The capacitor that fits

One listing covers every terminal style — open it and choose your terminal (lug, flying lead, or stud) from the dropdown to match how your old capacitor's wires come out. Not sure? Any works electrically; the terminal is just the connection.

How to be sure you get the right one

  • µF must match — the SB4-4/14-1.1 needs 45µF (about 40.5–49.5µF), within roughly ±5–10%. 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 SB4-4/14-1.1 capacitor

What capacitor does the Bianco SB4-4/14-1.1 use?

A 45µF 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 SB4-4/14-1.1?

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 (45µF).

Other Bianco pump capacitors

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

Use the find-my-part wizardBrowse all well & domestic pumps capsPump 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.