Baldor Electrolytic Motor Start Capacitor, 250 VAC, for Single-Phase Compressor Motors
Baldor-Reliance electrolytic motor start capacitors rated 250 VAC, for the single-phase capacitor-start motors Baldor builds for reciprocating air compressors, pumps and general industrial duty. Stocked in 216-259 MFD and 189-227 MFD.
These are the capacitors that live in the hump on top of a single-phase Baldor motor, and they are consumables rather than permanent parts. A start capacitor carries current only for the second or so it takes the rotor to come up to speed, so when one fails the symptom is total: the motor hums, pulls locked-rotor amps and trips the overload, or it sits dead with a faint buzz. Pull the cover and you will often see the answer straight away, a bulged can or a ruptured vent on the top. On compressors the underlying cause is almost always too many starts per hour, or a centrifugal switch that is no longer opening cleanly and is leaving the capacitor energised while the motor runs.
Part reference
- E0010: Baldor EC1216C06SP, 216-259 MFD, 250 VAC. Also sold as EC1216C06 and cross-referenced to 091A216B250CE7A and 092A216B250CE7A. 2-1/16 in. diameter x 4-3/8 in. length.
- E0011: Baldor EC1189C06SP, 189-227 MFD, 250 VAC. Also sold as EC1189C06 and cross-referenced to 091A189B250CE7A. 2-1/16 in. diameter x 4-3/8 in. length.
Key specifications
- Type: electrolytic motor start capacitor, intermittent duty
- Voltage rating: 250 VAC (220-250 VAC service), 50/60 Hz
- Case: round, vented
- Terminals: quick-connect spade
Which one do I need
The two ratings overlap and are close enough in size that they are easy to confuse, so read the figures off the old capacitor rather than matching by eye, or quote the Baldor motor catalog number and we will look it up for you. Never fit a start capacitor with a lower voltage rating than the original, and do not substitute a run capacitor for a start capacitor: a continuous-duty run capacitor of the same microfarad value will be destroyed on the first start, because the two are built for completely different duty cycles.
Check the start switch before you refit
A start capacitor that failed early is telling you something. With the motor off and discharged, check that the centrifugal switch or potential relay is operating freely, and confirm the motor is not being asked to start against full tank pressure because an unloader valve or check valve has stopped venting the head. Fixing that is the difference between a repair that lasts a day and one that lasts years.
Typical applications
Baldor-Reliance single-phase compressor duty motors, jet and centrifugal pump motors, farm duty motors, and general-purpose single-phase industrial motors of the capacitor-start type.
Baldor electrolytic motor start capacitors EC1216C06SP and EC1189C06SP, 250 VAC, in 216-259 MFD and 189-227 MFD, supplied by AirComParts through the Warthog Air Compressor Store alongside Baldor run capacitors, starter coils, pressure switches and motor overload relays.
NOTE: Actual product may be different from pictured!
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