Quick Connect Replacement Pump Start Capacitors

Quick connect replacement pump start/run capacitors with stud mount and 4x spade connectors for use with common centrifugal pump motors.

Starting at £15.60 £13.00

Grouped product items
Model SKU Our Price (ex VAT)
Model: 16µF Quick Connect Capacitor SKU: 3851-011 Our Price:
£15.60 £13.00
Model: 20µF Quick Connect Capacitor SKU: 3851-012 Our Price:
£15.60 £13.00
Model: 25µF Quick Connect Capacitor SKU: 3851-005A Our Price:
£15.60 £13.00
Model: 30µF Quick Connect Capacitor SKU: 3851-006 Our Price:
£23.76 £19.80
Model: 35µF Quick Connect Capacitor SKU: 3851-006A Our Price:
£32.40 £27.00
Model: 40µF Quick Connect Capacitor SKU: 3851-007 Our Price:
£33.36 £27.80
Model: 50µF Quick Connect Capacitor SKU: 3851-008 Our Price:
£35.52 £29.60
Model: 60µF Quick Connect Capacitor SKU: 3851-009 Our Price:
£39.84 £33.20
Model: 80µF Quick Connect Capacitor SKU: 3851-010 Our Price:
£45.79 £38.16

Quick connect replacement pump start/run capacitors with stud mount and 4x spade connectors for use with common centrifugal pump motors.

In single phase electric motors, the run winding is not capable of starting the motor. To start the motor, a secondary start winding uses a starting capacitor to introduce a rotating electric field. This rotating field is not constant, but is sufficient to start the motor spinning. When the motor reaches operating speed, the capacitor shifts to the run winding to control the speed of the motor.

A faulty pump run capacitor often becomes swollen, with the sides or ends bowed or bulged out. When this happens the motor will ‘buzz’ but not start.

Have you experienced pump start capacitor failure?

The most common causes of capacitor failure in single phase pumps are severe voltage irregularities (voltage drop or surge) from the power supply or from overheating in a pump with a blocked impeller or seized rotor.

Over long periods of use, the capacitance of the capacitor deteriorates. As a result, the motor may fail to start or run at full power. If you have experienced this, you need a replacement pump start capacitor which Whisper Pumps can help with.

As a longstanding supplier of pumps, motors and parts, Whisper Pumps are highly experienced in all models. If you are unsure on the control box you require, please contact our technical sales team today on 01777 871100 for free, expert advice.

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UK Delivery CostsDelivery Map

Zone 1 - England, Wales and Southern Scotland

Standard Delivery (3-5 working days) - Orders Under £100 - £7.50 / Over £100 - FREE

Express Delivery (1-2 working days) - £15

Premium Next Working Day (delivery before 13.00) - £26

Zone 2 - Scottish Highlands & Islands, Northern Ireland, Isle of Man, Scilly & Channel Isles

Standard Delivery (3-5 working days) - Orders Under £100 - £15 / Over £100 - FREE

Express Delivery (2-3 working days) - £15


Orders must be placed before 14.00 for express and premium next day delivery.

International Delivery

We offer a first class worldwide export service. Please contact us here for a price.

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