A defrost thermostat is a device that limits how much heat is applied to the defrost heaters typically found in refrigeration units. They allow current to flow when they reach a certain low (cut-in) temperature. During the defrost cycle, they, in turn, pass current to the defrost heaters. When the heaters cause the evaporator coils to reach a certain (cut-off) temperature, the defrost thermostat cuts out and stops the current flow to the defrost heaters. This action protects the refrigerator and the consumer from hazardous conditions and unnecessary power usage. Defrost thermostats fail often due to the large temperature swings that they are subject to.
ltem NO | PL007 23102 |
Use | Defrost/Temperature control/Protection |
Appliance | refrigerators, freezer |
Reset type | Automatic |
Base material | stainless steel, epoxy resin,silver,copper |
Voltage | 120V/240V |
TEMPERATURE | OPEN:60F° CLOSE:32°F |
Differential | According to the requirement |
Cycle of endurance | 100,000 |
Tolerance | Refer to the regulation |
Resistive amps | 10A / 5A |
Contact material | Silver |
Dielectric Strength | Parts between electriferous components and non-electriferous ones can bear 2000V (3750V for Reinforced insulation type) 50Hz AC current, which is nearly sine wave, for one minute as bearing test. Resulted no breakdown, no flashover. |
Insulation Resistance | With a DC 500V megger, borne DC 500V, the tested value is over 10MW. |
Resistance Between Terminals | Below 50mW |
Temperature characteristics | Normal close, Normal open |
Maximum ambient temperature | 90°C |
Diameter of bimetal disc | 25.4mm(1″) |
Line | Color: white/brown/yellow/blue Length: customized |
Terminal type | Customized (Refer to our specification) |
Cover/Bracket | Customized (Refer to our specification) |
Sample price | Free sample,USD 50 freight charge.Refund after mass order |
What does defrost thermostat do?
Temperature – the defrost thermostat measures the temperature of the evaporator, activating once it reaches a set point to warm and defrost the evaporator. Frost thickness – an infrared sensor is used to measure how much frost built up and activate the heating element once it reaches a certain thickness.
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