SLP4560 Supco 45/60 PSI Low Pressure Switch

The SUPCO SLP4560 is a low pressure control switch used in HVAC and refrigeration systems to protect compressors from low suction pressure conditions.

It is designed to open the electrical circuit when suction pressure drops too low, preventing:

• Compressor slugging

• Evaporator freeze-up

• Loss of refrigerant charge operation

• Oil return problems

This is a non-adjustable, automatic reset, SPST pressure switch commonly used on A/C, refrigeration, and heat pump systems.

SPECIFICATIONS

• Manufacturer: SUPCO (Sealed Unit Parts Co.)

• Part Number: SLP4560

• Type: Low pressure control switch

• Function: Compressor protection (low suction cutout)

• Cut-Out (OPEN): 45 PSI (opens on pressure drop)

• Cut-In (CLOSE): 60 PSI (resets when pressure rises)

• Pressure Range: 0–650 PSI max system rating

• Switch Type: SPST (single pole, single throw)

• Reset Type: Automatic reset

• Electrical Rating: 24V / 120V / 240V AC systems

• Connection: 1/4" SAE flare with Schrader depressor

• Max Burst Pressure: ~5000 PSI (housing rating)

• Ambient Range: approx. -30°F to 176°F