Ksd9700 Metal Case Bimetal Thermal Protector Temperature Control Switch for Fans

Product Description

PRODUCT SPECIFICATION

Product Name	KSD9700
Rated Voltage	250V AC
Rated Current	5A/10A
Reset Type	Auto Reset
Contact Type	Normally Closed(NC)/Normally Open(NO)
Shell Type	Plastic case/Iron case
Lead Style	Wire Lead
Wire Lenght	Customizable
Insulation System	Optional
Action Temperature	45℃~275℃
Tolerance	±5℃~±10℃(Optional)
Electrical Life	10,000 ~50,000 cycles
Insulation Resistance	50MΩ
Dielectric Strenght	1500VAC/1MIN

KSD9700 Thermal Protector | Bimetal Motor Protector Manufacturer | JAFLY

1.The KSD9700 bimetal thermal protector is a compact snap-action thermal switch designed for reliable overheat protection in motors, transformers, heating appliances and other temperature-sensitive electrical equipment.

2.When installed in close thermal contact with the protected component, the KSD9700 thermal protector responds to abnormal temperature rise. Once the preset operating temperature is reached, the internal bimetal disc actuates quickly to change the circuit state. In a normally closed configuration, the protector opens the circuit to interrupt power and help reduce the risk of overheating, motor winding damage, insulation aging and premature equipment failure.

3.Depending on the selected configuration, the KSD9700 bimetal thermal switch can be supplied with normally closed or normally open contacts, automatic reset performance, different lead wire options, insulation sleeves and metal or plastic housings.

4.KSD9700 thermal protectors are commonly used in electric motors, fan motors, water pump motors, vacuum cleaner motors, air-conditioner motors, shaded-pole motors, PSC motors, transformers, solenoids, fluorescent ballasts, electric heating appliances, small kitchen appliances, power tools and selected automotive electrical equipment.

5.For reliable protection performance, the KSD9700 thermal protector should be selected according to the actual operating current, inrush current, mounting position, insulation requirement, action temperature, reset temperature and safety standard of the final equipment.

Action Temperature Range: 45°C to 275°C

JAFLY thermal protectors are available with action temperatures from 45°C to 275°C, providing reliable overheat protection for motors, transformers, heating appliances and electrical equipment. The required trip temperature can be selected or customized according to the application, operating conditions and safety requirements.

What is the thermal protector?

The thermal protector is an automatic-reset bimetal thermal switch designed to help protect motors and electrical equipment from overheating. Heat generated by the protected component is transferred to the internal bimetal element. When the preset action temperature is reached, the bimetal element snaps and separates the electrical contacts, interrupting the circuit to help prevent further temperature rise.After the equipment cools down to the reset temperature, the bimetal element returns to its original position and the contacts close automatically, restoring power without manual operation. With a compact structure, reliable contact system and customizable action temperatures, the KSD9700 thermal protector is widely used for motor protection in pumps, fans, transformers, household appliances and other electrical equipment.

Inside the Thermal Protector

Precision Bimetal Element
Responds rapidly to abnormal heat for accurate thermal protection and reliable trip performance.
Silver Alloy Contact System
Provides stable conductivity and reliable circuit interruption during overheating conditions.
Compact 10 mm Design
Compact structure for easy integration into motor windings, pumps, fans and small electrical appliances.
High-Fatigue Contact Spring
Maintains consistent contact pressure for dependable switching and automatic reset performance.
How It Works:
Heat rises → bimetal element snaps → contacts open → power is interrupted → temperature drops → contacts reset automatically.

FAQ

What is the thermal protector?

How does a automatic reset Bimetal thermostat work?

The thermal protector is a compact bimetal thermal switch designed to protect motors, transformers, pumps, fans and electrical appliances from overheating. It opens the electrical circuit when the protected component reaches the preset action temperature.

The thermal protector uses an internal bimetal element to sense temperature. When abnormal heat causes the protector to reach its preset action temperature, the bimetal element snaps and opens the contacts to interrupt power. After the temperature drops to the reset temperature, the contacts close automatically and power is restored.

What is the difference between action temperature and reset ?

Is Bimetal thermostat suitable for motor protection?

The action temperature is the temperature at which the thermal protector opens the circuit. The reset temperature is the temperature at which the protector closes the circuit again after cooling. Both values should be selected according to the actual operating temperature and safety requirements of the application.

Yes. Bimetal thermostat is widely used as a motor protector in electric motors, pumps, fans, vacuum cleaners, power tools and household appliances. It is commonly installed close to the motor winding or heat source to provide responsive overheat protection.

Can thermal switch be used as overcurrent protector?

How do I choose the correct thermal protector?

Thermal switch is primarily a temperature protection device rather than a standalone fuse. It responds to heat generated by overload, locked rotor conditions or abnormal operation. For applications requiring direct overcurrent protection, it should be used together with suitable electrical protection components where necessary.

When selecting a thermal protector, consider the action temperature, reset temperature, rated voltage, rated current, protected component temperature, installation position, case type, lead wire specification and insulation requirements. The selected temperature should be based on the actual operating temperature of the motor or electrical equipment.

Can thermal protectors be customized?

What is the difference between plastic case and metal case?

Yes. JAFLY can provide customized thermal protectors with different action temperatures, lead wire lengths, wire materials, insulation sleeves, casing types, terminal options and product markings according to application requirements.

Plastic case thermal protectors are commonly used where electrical insulation and compact installation are important. Metal case versions can provide different heat transfer and mounting characteristics. The suitable option depends on the motor structure, installation location and insulation requirements.