Overview:
- From 4,000 to 120,000 BtuH
- Combination relay and start capacitor
- B11-365 and B11-519 are UR recognized
- One size for any PSC A/C and CSIR units
- Connect only two wires to existing run capacitor
- Gives additional starting torque to all single-phase
- 120/288VAC units, from 4,000 to 120,000 BtuH (1/2 through 10 HP)
Combination relay and start capacitor One size for any PSC A/C and CSIR units From 4,000 to 120,000 BtuH Connect only two wires to existing run capacitor Gives additional starting torque to all single-phase 120/288VAC units, from 4,000 to 120,000 BtuH (1/2 through 10 HP) B11-365 and B11-519 are UR recognized
Hard-Start Capacitors
This hard-start capacitor provides that extra jolt of energy for starting air conditioner or heat pump compressors that need an extra "jolt" of electricity to get started. Equipment that needs a hard-start capacitor:
- heat pump or condensers split-systems that have a thermostatic expansion valve (TXV) installed on them
- old heat pump or condensers that are mechanically stuck and not operating
If your old compressor isn't starting, install this hard-start capacitor before you do anything else. The parts inside a compressor might be too physically tight to move, or on systems with a TXV where the refrigerant pressures are higher on start-up, and need an extra "kick" of energy to get started.
Features:
- Installs in seconds across run capacitor terminals
- Contains relay and start capacitor for extra starting torque
Specifications:
- Voltage: 115V - 230V
- Increased Torque: 270 ounce inches
Applications:
- Room A/C units
- Residential and commercial PSC A/C units and heat pumps
- For all PSC A/C units from 4,000 thru 120,000 BTU’s (1/2 thru 10 H.P.)
- Can be used on 120 thru 288 VAC units
- For low voltage and hard starting compressors

