Danfoss 120Z0039 Crankcase Heater 400V 65W for Refrigeration Compressors

The Danfoss 120Z0039 is a 400-volt, 65-watt crankcase heater designed to protect refrigeration and air conditioning compressors during off-cycles and cold ambient conditions. This essential component prevents refrigerant migration into the compressor crankcase, which can dilute the oil and cause damage during startup.

Key Features:

• 400V operating voltage for commercial and industrial applications
• 65-watt power output provides effective heating capacity
• Prevents refrigerant condensation in compressor oil
• Maintains proper oil viscosity for reliable lubrication
• Reduces wear and extends compressor service life
• Direct mounting design for easy installation

Crankcase heaters are critical for systems operating in varying temperature conditions or with frequent on-off cycling. By maintaining oil temperature above the refrigerant saturation point, this heater ensures the compressor starts with clean, undiluted oil, preventing liquid slugging and mechanical damage. Suitable for commercial refrigeration, HVAC systems, and industrial cooling applications using Danfoss compressors.