Pull a dead capacitor out of a pool pump or washing machine and you’ll see a wall of numbers and codes printed on the side. Microfarads, voltage, a temperature range that looks like a date, body codes, safety stamps. It is not obvious which numbers you have to match exactly and which ones are nice-to-have. Get the wrong one and the motor will hum, trip a breaker, or burn out a winding inside a fortnight.
This guide decodes every line on a CBB60 motor run capacitor label so you can confidently order a replacement that fits and lasts. We’ll walk through each marking in the order it appears and flag which numbers must match the original.
What the µF value means and why getting it right matters
The microfarad (µF) value is the single most important number on the label. It tells you how much electrical charge the capacitor stores, which sets the phase shift the motor needs to start spinning and to keep running smoothly under load. On a CBB60 you’ll see values printed like 30µF, 30uF, or 30MFD (all mean the same thing).
This number must match the original within tight limits. Motors are designed for a specific capacitance, and even a small mismatch causes real problems. A capacitor that is too small leaves the motor under-torqued, so it runs hot, draws more current than it should, and trips overloads. Too large and the start winding sees excessive current, which cooks the windings over time and shortens the motor’s life dramatically.
The rule: replace like-for-like. If your old capacitor was 30µF, order a 30µF CBB60 with lug terminals or whichever terminal style your motor uses. Do not “round up” to the nearest size at the hardware shop. The 22 µF values we stock (4 through 80) cover almost every pool pump, fan, washing machine, and HVAC blower sold in NZ.
If the printed value has faded or the case has bulged so badly you cannot read it, the motor’s nameplate will list the correct µF rating.
Voltage rating: why you can go up but not down
Right after the capacitance you’ll see a voltage rating, almost always printed as 450VAC on a CBB60. This is the maximum continuous AC voltage the capacitor is designed to handle without breaking down internally.
Voltage is a ceiling, not a target. You can safely replace a 400VAC capacitor with a 450VAC one of the same microfarad value, but never the other way around. NZ mains sits at 230VAC nominal, but transient spikes from switching loads, lightning, and inductive kickback from the motor itself routinely push peaks well above 400V. A capacitor rated under those peaks fails fast.
Every CBB60 on our store is rated 450VAC, the standard for motor run duty in NZ and Australia. If you pull a 370VAC or 400VAC capacitor out of an imported appliance, a 450VAC replacement is the safer choice every time.
Watch out for DC ratings. Some capacitors are marked with both an AC and a DC value. For motor run duty you only care about the AC number. A capacitor marked 250VAC / 600VDC is a 250VAC part and is not a substitute for a 450VAC unit.
Tolerance, frequency, and temperature class
After voltage you’ll usually see three more codes that describe how tightly the capacitor holds its value and how hot it can run.
Tolerance is printed as ±5% or ±10%. This is the manufacturing variance on the microfarad value. A 30µF capacitor at ±5% will measure anywhere between 28.5µF and 31.5µF when new. Tighter tolerance (5%) is better for motor run duty because it keeps the motor’s phase shift consistent. Most quality CBB60s are ±5%.
Frequency is shown as 50/60Hz. New Zealand mains runs at 50Hz, so any capacitor rated for 50Hz operation is fine. Capacitors made for the US market sometimes list 60Hz only, which is not ideal for NZ. All our stock is dual-rated.
Temperature class is the cryptic string like -25/85/21. The three numbers are minimum operating temperature in °C, maximum operating temperature in °C, and damp heat hours. A -25/85/21 cap operates from -25°C to +85°C and survived 21 days of damp heat testing.
For NZ this matters. Pool pump capacitors sit in plastic enclosures on north-facing concrete pads where ambient on a hot Auckland or Hawke’s Bay summer afternoon pushes 30°C, and the inside of the cap housing easily reaches 60-70°C with the motor running. Always choose an 85°C rated capacitor or better. Avoid 70°C parts for any outdoor or roof-cavity install.
Body codes: CBB60, CBB61, CBB65
The body code tells you what type of capacitor it is. They look similar but are not interchangeable.
CBB60 is the cylindrical plastic-cased motor run capacitor used in single-phase induction motors. Pool pumps, washing machines, garage doors, evaporative coolers, ceiling and pedestal fans, small compressors. This is the most common type in NZ homes and the only body type we stock at capacitors.nz.
CBB61 is a smaller capacitor in a rectangular plastic case, used almost exclusively in ceiling fans where space is tight. Typically 1-6µF. If your fan capacitor is a small block with two or three wires, it is probably a CBB61.
CBB65 is a metal-cased hermetically sealed capacitor used in AC compressors and heat pumps. They look like a small soup can with terminals on top. If your outdoor AC unit has an oval or round metal can, that is a CBB65 and a plastic CBB60 is not a safe substitute.
Check the body code on your old capacitor before ordering. If it says CBB60, browse the shop to find the matching µF and terminal style.
Safety markings and what to look for in a quality cap
Down near the bottom of the label you’ll see a cluster of small safety codes. These tell you how the capacitor is designed to fail, which matters because every capacitor eventually fails.
Self-healing class is printed as P0, P1, or P2. A self-healing capacitor uses a metallised film that vaporises around any small breakdown, isolating the fault and letting the capacitor keep working at slightly reduced capacitance. P2 is the highest class and means the capacitor will fail open-circuit rather than short-circuit, which is what you want in a motor run application. A shorted capacitor can dump fault current into the motor and start a fire.
Compliance marks like UL, VDE, CQC, and RoHS indicate the capacitor has passed safety testing under American, European, Chinese, or environmental standards. More marks generally means more independent testing.
Dielectric type, when listed, is usually MPP (metallised polypropylene). MPP is the modern standard for motor run duty. Older oil-filled or paper capacitors are obsolete.
Manufacturer and date code are printed somewhere on the label. The date code is often a four-digit YYWW format (year and week). Capacitors degrade slowly even on the shelf, so a date code within the last two years is preferred.
Terminal style: L vs FL vs CL
The last thing to check is how the capacitor physically connects to your motor’s wiring. CBB60s come in three terminal styles and they are not interchangeable without rewiring.
L (Lug Terminal) has 6.3mm flat quick-connect spade lugs on the top cap. Your motor wiring will have matching female spade connectors that push straight on. This is the most common style on pool pumps and washing machines.
FL (Flying Lead) has pre-attached wire pigtails about 130mm long with ring-lug crimp terminals on the ends. Common on garage door openers and some HVAC units where the capacitor is mounted away from the motor and needs flexible leads.
CL (Core Lead) has an M8 threaded stud in the centre of the top cap for bolt-down mounting, plus flying leads. Used where the capacitor is bolted to a chassis or bracket. Less common in residential gear.
Match the terminal style to what is already in your appliance. If your old cap had spade lugs, order an L. If it had wires with ring lugs, order an FL. Mixing them means cutting and crimping, which is fine if you know what you are doing but adds time and another point of failure.
Pulling it all together
Once you understand the label, ordering a replacement is straightforward. Note the µF value, confirm 450VAC, check the body code says CBB60, then pick the terminal style that matches your appliance. Temperature class, tolerance, and safety marks are quality indicators, but the four numbers above are the ones that have to match.
The fastest way to land on the right SKU is the Find Your Capacitor wizard on the home page. Pick your machine type, the µF value off your old label, and the voltage, and it sends you straight to the correct product. If you already know what you need, the full shop lists every µF value from 4 to 80 in the terminal styles we stock. All NZ-bonded, around 2 weeks tracked delivery.