Dongguan Heng Hao Electric Co., Ltd
                                                                                                           
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15 Years
Since 2011
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KSD301 Bimetal Thermostat Thermal Cut Off Switch with 100000 Cycles 250V 16A and 0-250℃ Temperature Range

Price Negotiable
Price: USD 0.3~0.5PCS
MOQ: 1000PCS
Delivery Time: 10~15 WORKDAYS
Brand: HENGHAO
Product Description
KSD301 Thermal Cut Off Switch KSD301 KSD302 Bimetallic Thermostat
KSD301/KSD302 Bimetallic Thermostat product photo

The KSD series thermostat operates on the principle of bimetallic discs that snap into action when temperature changes occur. This snap action activates the internal mechanism to open or close the electrical contacts, effectively controlling the circuit. Key characteristics include fixed operating temperatures, reliable snap action, minimal flashover, extended service life, and reduced radio interference.

KSD302 Thermostat Specifications
Parameter Specification
Voltage & Current AC 125V max 15A; AC250V 5A 10A 15A max 16A
Action Temperature 0~250℃
Recovery and action temperature difference 0 to 25 degrees, or according to client's request
Temperature deviation ±3 / ±5 / ±10 degree or according to client's request
Circuit resistance ≤50mΩ (Initial value)
Insulation resistance AC50Hz 1500V / min, no breakdown blinding (Normal State)
Life cycle ≥100000 times
Contact type Normally closed or Normally open
Mounting bracket Two types: movable or immovable
Terminal type
  • 187 series: 4.8*0.5mm and 4.8*0.8mm
  • 250 series: 6.3*0.8mm
  • Terminal Angle: bending angle: 0~90°C optional
Housing Plastic or ceramic
Temperature sensor face Aluminum cap or copper head
KSD301/KSD302 thermostat technical diagram
KSD301 Auto Reset vs Manual Reset Types

Manual Reset Type: Features a bimetallic strip temperature sensor. When temperature reaches the activation point, the mechanism snaps open to break the circuit. The contacts remain open until manually reset by pressing the reset button, even after temperature decreases.

Note: 1. Manual reset requires temperature to decrease by 20°C before resetting (4-6N force recommended). 2. Minimum 20.4mm clearance required between reset button and cover for proper operation.

Auto Reset Type: Similar bimetallic strip mechanism automatically resets contacts when temperature decreases to the reset point, without manual intervention.

KSD302 Bimetal Thermostat Temperature Settings
Open Temp. Reset Temp. Open Temp. Reset Temp. Open Temp. Reset Temp.
-20℃±5℃ 5℃±5℃ 95℃±5℃ 80℃±5℃ 205℃±5℃ 175℃±10℃
-15℃±5℃ 5℃±5℃ 100℃±5℃ 80℃±10℃ 210℃±5℃ 180℃±10℃
-10℃±5℃ 5℃±5℃ 105℃±5℃ 85℃±10℃ 215℃±5℃ 185℃±10℃
Custom temperature settings available according to client requirements

This product holds UL, CQC, TUV and RoHS certifications.

KSD301/KSD302 thermostat certifications

Get in Touch

Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Dongguan Heng Hao Electric Co., Ltd
Location No.9, five lane, Shangchegang, Shangtang road, Gekeng, Hengli Town, Dongguan City, Guangdong, China
Contact Person Cherry Lee

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