What does an OEM capacitor part number actually tell you?
By itself, almost nothing. A code like Davey 400231SP is a line in a parts catalogue. It only becomes useful when you find the entry that maps it to real values. In Davey’s 2026 parts catalogue, that entry reads “Capacitor - 40mfd 450V”, a spec you can shop against.
A few part numbers encode the value (more on Davey’s below), but most are arbitrary: nothing in AstralPool’s 40287 hints that it’s a 25µF part. Some also bundle extras: Davey’s 400272SP is listed as “20mfd c/w loom”, meaning the OEM part includes a wiring loom.
Whatever the code, you’re always cross-referencing towards the same three facts: the µF value, the voltage rating, and the body/duty type (run vs start; see CBB60 vs CBB65 vs CD60).
How do you cross-reference a capacitor part number in 3 steps?
To cross-reference a motor capacitor part number, you convert the OEM number into the two electrical values that actually matter: capacitance in microfarads (µF) and rated voltage. First, search the part number with the brand name (for example “Davey 400231SP”) and find the manufacturer’s parts listing: Davey’s 2026 catalogue documents 400231SP as a 40µF 450V run capacitor. Second, confirm that value against what is printed on your own capacitor’s label, because motors get revised mid-production. Third, choose a replacement that matches the µF on the label (within ±5% is fine) with the same or a higher voltage rating: 450V safely replaces 400V on 230V/50Hz NZ mains, never lower. The body code (CBB60, CBB65, CD60) tells you the capacitor type and must also match: run capacitors replace run capacitors, start capacitors replace start capacitors. The part number gets you close; the printed label is the specification.
In practice:
- Find the OEM listing. Search the brand plus the part number, ideally in quotes. Manufacturer catalogues, distributor price lists and OEM-part shop listings are the best sources.
- Confirm the documented µF and voltage. A good listing states both (“Capacitor - 40mfd 450V”); many state only the µF. Close that gap in step 3.
- Match it against your own capacitor. Isolate power, discharge the capacitor (see the safety box), and read what’s printed on the can. Our guide to reading the µF and voltage on a capacitor label decodes every marking. If the label and the catalogue disagree, the label wins.
How do you search a capacitor part number?
A capacitor part number lookup usually fails because people search the number bare. “400272SP” alone returns junk; “Davey 400272SP capacitor” finds the catalogue entry in seconds. Tactics that work:
- Add the brand and the word “capacitor” to every search.
- Search the pump model instead: “Davey XJ90 capacitor” often beats the part number.
- Find the manufacturer’s parts catalogue PDF: Davey, DAB and AstralPool all publish parts breakdowns listing capacitor values per model.
- Check the motor nameplate: many pumps print the run capacitor value on it.
- Use a curated lookup: our capacitor finder lists documented values for seven pump brands sold in NZ (including more than 80 Davey models) with the evidence source noted for each.
Is there a capacitor equivalent chart? Seven real examples
There’s no universal registry for motor capacitors: every “equivalent chart” is really a table of documented specs. Seven real OEM part numbers, decoded from manufacturer and distributor listings:
| OEM part number |
Brand & documented use |
Documented spec |
Generic replacement class |
| 40287 “Notos” |
AstralPool Hurlcon CX / CTX pool pumps |
25µF |
CBB60, 25µF ±5%, 450V |
| 702164 |
DAB Jet / Jinox / Jetcom 102M |
16µF, 450V |
CBB60, 16µF ±5%, 450V |
| 400270SP |
Davey Aquamate, XJ350, XP350, XP450 + others |
12µF (no voltage printed) |
CBB60, 12µF ±5%, 450V |
| 400272SP |
Davey XJ90/XJ90T, HM60-10, XF111SS |
20µF, c/w wiring loom |
CBB60, 20µF ±5%, 450V |
| 400231SP |
Davey PJ200, PJ240, HM270-25 |
40µF, 450V |
CBB60, 40µF ±5%, 450V |
| 30PV45D |
Davey QB2001, QB2002 spa pumps |
30µF |
CBB60, 30µF ±5%, 450V |
| 401313 |
Davey JY350, SJ35-04 |
13µF, 500V |
Non-standard: match the label exactly |
Two honest caveats. These are documented references, not fitment guarantees, manufacturers revise motors mid-production. And where the listing prints no voltage (like 400270SP), only the label on your own capacitor can close that gap.
A 25µF 450V CBB60 matching the Notos spec is NZ$29.95 from our range, with tracked NZ delivery: each product page shows the delivery time for that size.
What do Davey capacitor part numbers mean?
Davey capacitor part numbers cluster into families. The 400xxx codes cover most of the pressure, transfer and multistage ranges: 400265 is 8µF (XP25P2, Celsior C200), 400270SP is 12µF, 400272SP is 20µF, 400283SP is 30µF (125S/D, 165S/D) and 400231SP is 40µF 450V.
The spa range encodes the value directly: 30PV45D is 30µF, 40PV45D is 40µF. Some larger transfer pumps run a pair: Davey’s 2.2kW model 25301 is documented with a 48600SP 40µF 400V run capacitor plus a 49120 start capacitor printed 120-144µF, 220V. Replace each like-for-like; a start capacitor can never stand in for a run capacitor, and a start capacitor printed with a range should be matched to that range. Check the label on yours and ask us if you’re unsure. The full list of documented models is in our Davey capacitor hub.
Is a generic CBB60 as good as the original branded part?
A generic CBB60 run capacitor with the same specification does the same job as the original branded part. A motor-run capacitor has no brand-specific electronics: it is defined entirely by its capacitance (µF), voltage rating, capacitor class and build quality. AstralPool’s genuine “Notos” capacitor, part number 40287, is documented as 25µF for CX and CTX pool pumps; any quality 25µF ±5%, 450V CBB60 run capacitor meets that same specification. What actually matters when substituting: the µF on the label (within ±5% is fine), the same or a higher voltage (450V replaces 400V or 370V, never lower), the same duty (run for run, start for start), a temperature class suited to a hot pump shed, and terminals your existing wiring can connect to. What doesn’t matter: the brand name on the sticker. Always confirm the spec against the label on your own capacitor before ordering.
The genuine part sometimes earns its premium in fitting convenience (a pre-attached loom, a bracket, a specific can size) so check physical dimensions and terminal style (spade, flying lead or stud) before ordering either way. A climatic code like 40/70/21 on the label means −40°C to +70°C operation, fine for an NZ pump shed.
What if you can’t find your part number anywhere?
The part number was only ever a pointer. There are better sources:
- Read your existing capacitor. The µF, voltage and body code printed on the can are the specification. Our CBB60 label guide walks through every marking.
- Read the motor nameplate. Many pumps print the run capacitor value there.
- Search the pump model, not the capacitor: “Onga 413 capacitor” beats a dead part number.
- Use the wizard. Our find-your-capacitor wizard works from your appliance, brand and model down to a spec.
- Ask us, with photos of the capacitor label and the motor nameplate.
One warning: if the documented spec is odd, like the 13µF 500V part Davey lists for the JY350, don’t round to the nearest common size. A 12µF or 15µF substitute is more than 5% off, which changes the motor’s phase balance and can cook the windings. Match odd values exactly, or check with the manufacturer.
Why does the printed label beat the part number?
Because catalogues describe what a model shipped with at print time, and motors get revised. Davey’s own catalogue resorts to rows marked “all other models”, right for most units, wrong for the exceptions. Your capacitor’s label describes the part your motor has actually been running on, which is why every cross-reference ends at your own can: the µF on the label (within ±5% is fine), the same or a higher voltage, the same body code and duty.
That’s why we never claim a part “fits” your pump outright: the finder gets you to a documented starting point; the printed label confirms it. Cross-reference done? Confirm the µF and voltage printed on your own capacitor, then match it. The spec is the spec, whatever the sticker says.
Frequently asked questions
What is the equivalent of the AstralPool Notos 40287 capacitor?
AstralPool’s Notos capacitor, part number 40287, is documented as a 25µF run capacitor for Astral CX and CTX series pool pumps. The generic equivalent class is a CBB60 25µF ±5%, 450V motor-run capacitor. Confirm the 25µF against the label on your own capacitor before ordering.
What capacitor does a Davey XJ90 use?
Davey’s 2026 parts catalogue lists part 400272SP, a 20µF capacitor supplied with a wiring loom, for the XJ90 and XJ90T (1.1kW motor). A 20µF ±5%, 450V CBB60 matches that documented spec. Check the terminal style suits your loom, and confirm 20µF on your own capacitor’s label.
Do capacitor part numbers cross-reference between brands?
No. There’s no shared registry: Davey’s 400231SP and another brand’s 40µF part have unrelated codes. Cross-referencing between brands means converting each number to a µF and voltage spec, then comparing. Two capacitors with the same µF, voltage, duty and body code are electrically interchangeable regardless of the brand code.
My part number points to a CBB65 or CD60. Can you supply it?
CD60, yes: we stock CD60 motor-start capacitors from 50µF to 500µF at 250VAC (11 values). See our motor start capacitor guide for how to match one. CBB65, no: we stock CBB60 run capacitors (4-80µF, 450V) but not CBB65 metal-can, CBB61 or dual-run capacitors. Run and start capacitors are different constructions and must be replaced like-for-like. If your cross-reference lands on a type we don’t carry, confirm what you have with the wizard, then contact us and we’ll point you in the right direction.
Can I replace a pump capacitor myself?
If the pump or appliance plugs into a socket, unplug it, discharge the capacitor, and swap like-for-like: the µF on the label (within ±5% is fine) and the same or a higher voltage. If it’s hardwired into fixed wiring, or you’re not confident working on mains equipment, have a registered electrician do it.