Compressor Capacitors: Run, Start & Starter Parts
Compressor capacitors and refrigeration starter parts
Compressor-capacitor selection begins with the circuit, not the appliance name. This collection includes CBB65-style compressor run-capacitor listings, CBB60 run-capacitor options also advertised for air compressors, CD60-labelled intermittent motor-start capacitors, and refrigerator starter or overload components. It also includes fan CBB61 parts and an X2 film-capacitor assortment; those are not automatically substitutes for a compressor capacitor. Preserve the original equipment's exact electrical and mechanical requirements.
Which type do you need?
- Run capacitors: CBB65 options include single-value and two-section configurations, including listings with 25+1.5, 30+3 or 35+2.5 µF. Each section has its own role and terminal arrangement. Do not add the µF figures together or treat a dual-section component as a single capacitor. CBB60 cylindrical run-capacitor listings include wire leads, double-insert tabs and mounting studs, and appear with different stated AC voltages.
- Start capacitors: CD60 and other high-capacitance refrigerator or air-compressor listings include µF ranges and voltage figures such as 250, 330 or 450 V. Confirm the exact selected part's AC rating, intermittent duty, capacitance range and required switching circuit. A start component is not a continuously connected run replacement.
- Starter and protection assemblies: QPE2-B15MD3-labelled PTC/overload items, refrigerator starters and inverter-appliance accessory listings may contain a relay or protector rather than a standalone capacitor. Check the original service part and equipment topology. A device or brand named in a seller headline is not proof of fit or genuine origin.
- Adjacent items: CBB61 fan capacitors and an X2 film assortment occur in this collection. Fan multi-wire parts, mains-interference film parts and compressor motor capacitors serve different circuits; an X2 label or 275/310 V headline is not an approval for a compressor application.
Replacement selection, step by step
- Identify the compressor and equipment model and read the original device marking or service manual. Decide whether the failed part is a run capacitor, a switched start capacitor, a dual-run section, a PTC starter, an overload protector or an assembly.
- Match every specified capacitance in µF and its tolerance, the actual AC voltage rating, frequency, operating duty, temperature and required protective class or approvals. Check the selected variant and the capacitor's physical marking; listing headlines and appliance search terms are insufficient.
- Compare the exact terminal map, number of electrical sections, lead or tab size, diameter, height, stud/thread and enclosure clearance. A pair of duplicate tabs is not necessarily an extra capacitor section; use the device diagram, not tab count.
- Confirm the precise replacement and installation with the appliance manufacturer or a qualified technician. Do not use a generic mains or compressor wiring pattern from an unrelated listing.
Buyer checklist and FAQ
Bring the compressor model, equipment service part number, original markings, circuit duty, each µF value or start-capacitance range, VAC, frequency, terminal diagram, dimensions and required quantity.
Does “compressor start capacitor” mean a CBB65 is start-only? No. Seller terminology alone does not define whether the selected device is a continuous-duty run capacitor or an intermittent start capacitor.
Can a 450 VAC part replace any 330 VAC part? Not by voltage alone. Duty, capacitance, circuit, physical fit and manufacturer specifications must also match.
Is a PTC overload protector a capacitor? No. It is a starter or protection component; identify its exact role before selecting a replacement.
