
Quick overview
- 50 MFD at 370V The two ratings that have to match the capacitor you are replacing.
- Run capacitor Stays in the circuit while the motor runs, unlike a start capacitor that drops out.
- Sized 2" by 3-3/4" Measure the can before ordering so it fits the bracket or the cover it lives under.
- Wide cross reference The source lists a long set of substitute part numbers from other suppliers.
- U.S. Seal supplied Sold under the U.S. Seal name as part RD-50-370.
- Discharge before you touch it A capacitor can hold a charge with the power off, so cut power and discharge it before removing the old one.
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Product details
This is a run capacitor rated 50 MFD at 370 volts, supplied by U.S. Seal as part RD-50-370. The can measures 2" across by 3-3/4" tall.
Matching the part
A run capacitor is chosen by two numbers, the capacitance in MFD and the voltage rating, both of which are printed on the side of the old part. Both have to match, with the one exception that a higher voltage rating is acceptable and a lower one is not. The source also carries a set of substitute numbers used by other suppliers, including RD50370, 3190029, 17586350, 319-0029, 628318313 and 628318-313, which is useful when the number stamped on your failed capacitor is not the U.S. Seal one.
Before you start
Cut power at the breaker and discharge the capacitor before you touch the terminals. A capacitor holds a charge after the motor has stopped, which is the part of the job that catches people out. If the motor hums but will not spin, or starts slowly and runs hot, the capacitor is a common cause and a cheap thing to rule out.
| Brand | U.S. Seal |
|---|---|
| Manufacturer part number | RD-50-370 |
| Alternate part number | 12725 |
| Capacitance | 50 MFD |
| Voltage | 370V |
| Dimensions | 2" x 3-3/4" |
| Substitute part numbers | RD50370 ESS, 3190029 WAT, 17586350 MTK, 319-0029 WAT, 628318313 AOS, 628318-313 AOS, 175863-50 |
| Type | Run capacitor |
| Shipping weight | 0.4 lb |
| Ships | Parcel |
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