KSD9700 thermostat thermal protector switch

KSD9700 series temperature control switch (Hi-Amp cut-off & battery thermal protection thermostat) is composed of high-sensitivity bimetal disc, moving contact, static contact, fixed base, shell, temperature-resistant wire, etc. When working, the bimetallic disc is in a free state, the moving contact and the static contact are closed, and the circuit is turned on. When the temperature of the electrical appliance rises to the operating temperature of the thermal protector due to a fault, the bimetallic strip generates internal stress due to the heat and quickly acts, pushing the moving contact away from the static contact to disconnect the circuit. Thus, the power supply of the faulty electrical appliance is cut off to protect the electrical appliance. When the temperature of the protected electrical appliance drops to the rated reset temperature value of the thermal protector, the bimetallic strip returns to the initial state, the contact is closed, and the electrical appliance resumes normal operation. This product has the advantages of low resistance, fast temperature sensing, fast action, safety and reliability, and small size.

Bimetal Temperature Switch Thermostat 100C N.C KSD9700

Hi Amp 250V AC 16A, 25A, 35A, KSD9700 thermal switch

Hi-Amp Hi-Temp KSD9700 Bimetal Disc Temperature Switch N/O Thermal Protector

The current overload protection principle of KSD9700:
The current passes through the moving contact terminal (bimetallic strip), and then the static contact terminal is connected to the electrical appliance (such as a battery, etc.) to form a circuit. When the current of the electrical appliance is too large and exceeds the trip value set by the protector, the protector will cut off the power supply within the set time to protect the electrical appliance.

The temperature protection principle of KSD9700:
The current passes through the moving contact terminal (bimetallic strip), and then the static contact terminal is connected to the electrical appliance (such as a battery, etc.) to form a circuit. When the electrical appliance does not work properly and the surrounding temperature is too high, the heat is transferred to the bimetallic strip to reach the corrected trip temperature, causing the electrical contact to quickly disconnect and cut off the circuit. When the temperature drops to the reset temperature, the bimetallic strip resets and quickly closes the electrical contact to connect the circuit, and continues the cycle.

KSD9700 bimetal temperature switch structure diagram

KSD9700 temperature control switch wiring diagram and circuit diagram

KSD9700 structure and application
The KSD9700 series products are a kind of thermostat with bimetal as temperature sensing element. When the appliance is working normally, the bimetallic strip is in a free state and the contact is in a closed/open state. When the temperature rises to the action temperature value, the bimetallic element generates internal stress due to heat and quickly moves, opens/closes the contact, cuts off/connects the circuit, and thus plays a role in thermal protection. When the temperature drops to the reset temperature, the contact automatically closes/opens and resumes normal working state. It is widely used in household electrical motors and electrical equipment, such as washing machine motors, air conditioner fan motors, transformers, ballasts, electric heating appliances, etc.

Wiring diagram and circuit diagram of KSD9700 temperature control switch
Wiring diagram of temperature control switch ksd9700

Features and advantages
Low internal resistance (<50mΩ);
Fast temperature sensing, fast action, safe and reliable;
Small size, easy to install;
Leads of different lengths or specifications can be customized according to customer requirements; two types of normally closed and normally open are available.

KSD9700 series temperature control switch product advantages
⑴ Small size, easy to install
⑵ Quick-acting bimetallic strip, fast response speed
⑶ Lifespan up to 10,000 times or more
⑷ Anti-vacuum varnishing process
⑸ Can replace SENSATA 17AM 7AM, Korean SEK ST-22 and other foreign products

KSD9700 series temperature control switch precautions
⑴ When using contact temperature sensing installation, the product should be close to the installation surface of the controlled device.
⑵ Do not collapse or deform the plastic or metal shell during installation to avoid affecting the performance.
⑶ The metal shell KSD9700 has an insulating jacket. Do not remove or crush the additional insulating jacket during installation to avoid leakage and ensure safe use.
⑷ KSD9700 is used in circuits with a current of no more than 5A~45A, and a copper core wire with a cross-section of 0.4-0.75㎜2 should be selected to connect it.
⑸ The product should be stored in a ventilated, clean, dry place with no corrosive gas and a relative humidity of less than 90% and an ambient temperature below 40°C.