AC Motor Capacitors: CBB60, CBB61 & CBB65
AC motor capacitors for fans, pumps and compressors
This collection primarily contains AC motor capacitor listings for CBB60 cylindrical run types, CBB61 fan and compact rectangular run types, CBB65 compressor and dual-value motor-run assemblies, plus CD60-labelled motor-start capacitors. “Start” appears in many product titles even when the described part is a motor-run film capacitor; a start capacitor and a continuous-duty run capacitor perform different jobs. Identify the original component's duty rating and the equipment wiring diagram before choosing a replacement.
Compare the actual part, not just 450 V
- CBB60 and CBB61: Compare the selected µF value, specified AC operating voltage and frequency, continuous-run duty, body size, mounting, lead or spade-terminal configuration and approval markings. CBB61 fan units may be rectangular or plug-in types; CBB60 options often use cylindrical bodies and different screw or dual-insert terminations. The CBB designation alone does not certify a given unit or prove fit.
- CBB65: Listings include single-value cylindrical units and two-section values such as 25+5 µF or 60+5 µF. A dual-value part has separate sections with a shared connection according to its own terminal diagram; match both capacitances and wiring, not just the larger number. “4+2” and terminal-count language must be checked against the markings and the original assembly.
- CD60 motor-start types: Larger µF values such as 200–400 µF appear in CD60-labelled options, including 125 V, 250 V and inconsistently described higher-voltage listings. A start-rated capacitor may be intended only for intermittent duty. Verify its AC rating, start cycle, switch arrangement, terminals and equipment specification before use; never treat it as a continuous run component on the basis of capacitance.
Replacement selection workflow
- Disconnect power and follow the appliance's service instructions. Read the original capacitor's marking and motor schematic to establish run versus start function, single versus dual section, µF tolerance, AC voltage, frequency and terminals.
- Match the exact selected variant's capacitance and an appropriate documented AC voltage rating, then compare dimensions, mounting stud, leads, terminal grouping and operating temperature. Similar 450 VAC labels do not establish the same duty cycle, safety mechanism or equipment compatibility.
- Confirm applicable product-level standards, agency approvals and construction where required by the installation. Obtain a datasheet for the precise component rather than relying on “original”, model family, appearance or a marketplace headline.
Other AC-labelled capacitors here
A CH85-labelled microwave high-voltage part, MKP X2-labelled interference-suppression film options and 400/450 V DC aluminum electrolytics also appear in this collection. A microwave capacitor has a different high-voltage application; X2 is a particular line-to-line safety class requiring verified markings and traceable approvals; a DC electrolytic is not a motor-run or X/Y safety capacitor. None can be substituted solely because the listing contains “AC”. For mains equipment, use qualified service practice and the equipment manufacturer's specified replacement; this page is a selection guide, not a wiring procedure.
Buying checklist and FAQ
Record the original part number, motor function, each µF section and tolerance, documented VAC rating, duty, 50/60 Hz requirement, case size, mounting, terminal diagram, temperature and approval documentation, plus selected pack quantity.
Are start and run capacitors interchangeable? No. Confirm duty and circuit requirements for the specific motor.
Can a dual 35+5 µF unit replace a single 35 µF capacitor? Do not assume so: the extra section and common terminal require an equipment-specific connection and approved replacement.
Does a 275 VAC X2 listing prove mains approval? No. Verify the selected part's X2 marking, applicable standard and traceable approvals before any line-to-line use.
