AstralPool CTX Capacitor

The capacitor listed for the AstralPool CTX pool pump is a 25 µF (25 uF / 25 MFD), 450 VAC motor-run capacitor. This CBB60 replacement has core leads and suits the CTX’s single-phase motor. Pumps in the CTX family can carry different label codes, so read the µF value printed on your old capacitor and match it exactly before ordering.

Choosing the right capacitor for the AstralPool CTX

This listing is a 25 µF capacitor. The CTX name covers several label codes, including CTX280, CTX400 and CTX560, and it is also sold as the Hurlcon CTX. Do not assume every one of those takes 25 µF. The number that matters is the one printed on the side of your existing capacitor, shown as µF, uF or MFD. If yours reads 25, this is the right part. If it reads something else, order that value instead, or check the AstralPool CTX capacitor guide.

The voltage figure on a replacement must be the same as the old one or higher. This capacitor carries a 450 VAC rating, which covers the usual 230 V household supply.

How a CTX run capacitor fails

On a single-phase motor like the CTX, the run capacitor stays in circuit the whole time the pump is going, feeding the auxiliary (start) winding so the motor builds a rotating field and runs with full torque. Heat and age gradually reduce its capacitance, so the motor gets weaker long before the part looks damaged.

• The motor hums at switch-on but does not spin, or only starts after you flick the fan or shaft.
• The motor’s thermal overload cuts out soon after the pump starts.
• The motor runs hot and slower than usual.
• The old capacitor case is swollen, split or leaking oil.

Other pumps listed with a 25 µF 450 VAC rating

A 25 µF 450 VAC rating is also listed for the DAB Aquajet 112M, DAB Aquajet 132M, DAB K12/200, Grundfos JP6, Onga Pantera PPP1100 and Onga Pantera PPP1500. A 25 µF 450 V CBB60 capacitor is also sold without a pump name; check its terminals against your old one. Before you touch the wiring, isolate the power and safely discharge the old capacitor using insulated tools, as it can hold a charge. If the CTX seal is weeping as well, the AstralPool CTX service kit pairs this capacitor with the 3/4″ mechanical seal, and other parts for this brand are under AstralPool service kits.

Before you order

Check the old part before fitting: match the µF printed on your old capacitor.

What size capacitor does an AstralPool CTX take?

The capacitor listed for the AstralPool CTX is 25 µF, 450 VAC. Always match the µF printed on your old capacitor; if it shows a different value, order that value instead.

What terminals does the AstralPool CTX capacitor have?

The 25 µF capacitor listed for the AstralPool CTX has flying leads, in a CBB60 motor-run body.

My CTX hums but won't start. Is it the capacitor?

A hum with no rotation is a common sign of a failed run capacitor on a single-phase pump like the AstralPool CTX. Check that the shaft turns freely by hand, then replace the capacitor with one of the same µF value.

Can I use a higher voltage capacitor in my AstralPool CTX?

Yes. On the AstralPool CTX the voltage rating can be the same as the old capacitor or higher, but the µF value must match. This one carries a 450 VAC rating.

Is this an AstralPool capacitor?

No. It is an aftermarket CapacitorsNZ capacitor to suit the AstralPool CTX and is not made by AstralPool.

What if it doesn't fit?

If you're unsure, send us a photo of your old part and the pump's label before ordering.