Century 628318-308 run capacitor, 30 MFD 370 VAC, for pool pump motorsCentury Run Capacitor, 30 MFD, 370 VAC, 1-3/4" x 2-7/8", 628318-308 In stock$5699
Century 628318-308 run capacitor, 30 MFD 370 VAC, for pool pump motors
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Century Run Capacitor, 30 MFD, 370 VAC, 1-3/4" x 2-7/8", 628318-308

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$5699
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Quick overview

  • Rated 30 MFD at 370 VAC Match both numbers to the capacitor coming off the motor before you order.
  • Measures 1-3/4 in. by 2-7/8 in. The physical size matters as much as the rating, because the capacitor has to sit in the motor housing or under the band.
  • Run capacitor, not a start capacitor A run capacitor stays in the circuit the whole time the motor is turning.
  • Century branded Supplied under the Century motor brand.
  • A common motor no start cause A motor that hums, trips or starts slowly is very often a tired capacitor rather than a failed motor.
  • Inexpensive first repair Far cheaper to change than the motor it protects.
Full description and specifications ↓

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Product details

The Century 628318-308 is a run capacitor rated 30 MFD at 370 VAC, in a can measuring 1-3/4 in. by 2-7/8 in. It is a replacement capacitor for pool pump motors.

Matching the part

Three things have to line up: the capacitance in MFD, the voltage rating, and the physical size of the can. The rating is printed on the side of the capacitor already in the motor. Size matters because the capacitor has to fit the housing or the band it is clamped under, and capacitors of the same rating are not all the same shape.

What a bad capacitor looks like

A motor that hums without turning, comes up to speed slowly, runs hot or trips a breaker is very often carrying a failed run capacitor rather than a failed motor. Capacitors are consumable and they age faster in hot equipment pads. Swapping one is cheap next to replacing a motor.

Safety

Capacitors hold a charge after the power is off. Kill the breaker and discharge the old capacitor before you touch the terminals.

From Pool School

Replace the Pool Pump Motor or the Whole Pump?The manufacturers' tests first, what each repair replaces, and the federal motor rule. Read How to Prime a Pool PumpFrom the breaker to a full pot, each manufacturer's time limit, and what to check when it won't catch prime. Read
Specifications
Brand Century
Manufacturer part number 628318-308
UPC 032240731543
Type Run capacitor
Capacitance 30 MFD
Voltage 370 VAC
Dimensions 1-3/4" x 2-7/8"
Application Pool motor capacitor
Shipping weight 0.3 lb
Ships Parcel

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Customer reviews

Questions and answers

What people ask about this product, answered by our pool techs.

What are the ratings on this capacitor?
30 MFD at 370 VAC. Both figures need to match the capacitor you are replacing.
What size is it?
1-3/4 in. by 2-7/8 in. Check that against the space in your motor before ordering, since capacitors of the same rating come in more than one can size.
Is this a start capacitor or a run capacitor?
It is a run capacitor. It stays in the circuit while the motor runs, rather than dropping out after start up.
My motor hums but will not turn. Is this the fix?
It is the first thing to check. A failed run capacitor commonly leaves a motor humming, drawing current and not coming up to speed. Discharge the old capacitor before handling it.
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