17AM-D series thermal protector
17AM-D series thermal protector is a current and temperature sensitive protection device that is connected in series with the motor coil. When the temperature and current increase, the heat generated is transferred to the bimetal disc. When the predetermined operating temperature setting value is reached, the bimetal disc quickly acts, causing the contacts to disconnect and cutting off the circuit. When the temperature of the motor coil drops to the rated reset temperature of the product, the bimetal disc returns to its initial state, the moving contact closes, and the circuit conducts again.
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Principle and structure

17AM-D series thermal protector is a current and temperature sensitive protection device that is connected in series with the motor coil. When the temperature and current increase, the heat generated is transferred to the bimetal disc. When the predetermined operating temperature setting value is reached, the bimetal disc quickly acts, causing the contacts to disconnect and cutting off the circuit. When the temperature of the motor coil drops to the rated reset temperature of the product, the bimetal disc returns to its initial state, the moving contact closes, and the circuit conducts again.

17AM-D+PTC thermal protector is equipped with a PTC heating element in parallel with the contact on the 17AM-D protector. When the 17AM-D protector is in the closed state, the PTC is in a short circuited state without voltage. When the protected object has an abnormality, the contact of the protector is disconnected, and the PTC generates voltage heat, which keeps the protector in the disconnected state. Due to the PTC resistance reaching 10K Ω or more, the load is in a stopped state. Only after the power is cut off and the PTC cools down, can the protector contacts automatically reset and the power load be reconnected to restore operation.

Instructions and applications

17AM-D series thermal protector has the advantages of precise temperature control and high accuracy. Applied to various types of induction motors, universal motors, transformers, ballasts, power tools, electric heating appliances, etc.

17AM-D+PTC thermal protector is mainly used in vacuum cleaners, pulverizers, power tools, garden tools, and high-power water pump motors.

Provide corresponding insulation sleeves according to customer usage needs

Dimension

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Certification

17AM-D:UL VDE COC CB KC

17AM-D+PTC:UL VDECOCCB

Temperature specification

Open temperature: 50~200℃; one gear every 5℃, tolerance ±5℃

Instruction for model and specification

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Contact capacity

12VDC25A
125VAC20A
24VDC20A
250VAC10A
600VAC4A

Current characteristic diagram

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