Capacitors
Motor start and run capacitors from Engineering Supplies include BMI Type 92A AC start capacitors and 400 V AC and 450 V AC run capacitors. Browse the separate product ranges to match the capacitor type, capacitance and voltage rating specified for your motor.
Motor start and run capacitors in this range
BMI Type 92A start capacitors are listed with capacitance bands and voltage options. Some variants also specify a resistor. Check all details for the selected part number before ordering a replacement.

Compare the 400 V AC run capacitor range with the 450 V AC run capacitor range. The 450 V listing includes individual capacitance values from 1 to 90 µF. Use the product options to find the specified value.
Matching a replacement capacitor
First, identify whether the motor requires a start or run capacitor. Then record the capacitance, voltage and other markings on the existing unit. Also check the body dimensions, terminals and mounting arrangement against the replacement.
Start and run capacitors perform different duties, so select the type specified by the motor manufacturer. A similar body size alone does not confirm an electrical match.
If the label is unclear, send a photo together with the motor model and nameplate details. Our team can help identify the listed options and the information needed to check suitability.
Capacitor selection support
Contact Engineering Supplies for capacitor product details and selection support. Call (08) 9258 8444 or email sales@engsup.com.au with the required type, µF value, voltage rating and quantity.
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- Capacitors
BMI Type 92A AC Motor Start Capacitors
This capacitor is an AC motor start capacitor listed across four voltage bands from 125 Vac to 330 Vac.
- For example, replacing a BMI Type 92A start capacitor by matching the voltage band and capacitance band
- Also, motor start circuits already confirmed as needing a start capacitor rather than a run capacitor
- In particular, 330 Vac jobs where the old part included a resistor
P/N: MSC
Price range: $23.04 through $122.16 ex. GST - Capacitors
450 Vac Motor Run Capacitors
This capacitor is available in 26 capacitance values from 1µF to 60µF.
- For example, replacing this unit by matching the microfarad value and voltage marking
- Also, motor rewind and maintenance work needing a specific capacitance from this wider range
- In particular, jobs already confirmed as needing a run capacitor rather than a start capacitor
P/N: MRC450
Price range: $8.89 through $82.78 ex. GST - Capacitors
400 Vac Motor Run Capacitors
This capacitor is available in 13 capacitance values from 16µF to 90µF.
- For example, replacing this unit by matching the microfarad value and voltage marking
- Also, motor rewind and maintenance work needing a specific capacitance from this range
- In particular, jobs already confirmed as needing a run capacitor rather than a start capacitor
P/N: MRC400
Price range: $25.36 through $88.75 ex. GST


