Dongguan Heng Hao Electric Co., Ltd
Bimetallic thermostat, thermal protector, thermal switch manufacturer
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250V 16A KSD301 KSD302 Thermostat Bimetallic Thermostat Thermal Cut Off Switch
KSD302 thermal switch Principle and structure
The main principle of KSD series thermostat is that one function of bimetal discs is snap action under the change of sensing temperature. The snap action of disc can push the action of the contacts through the inside structure, and then caused on of off the circuit finally. The main characteristic are the fixation of working temperature, the reliable snap action, less flashover longer working life and less radio interference.
KSD301 thermostat’s specification
| Voltage & Current | AC 125V max 15A; AC250V 5A 10A 15A max 16A |
| ActionTemperature | 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 resistanc | AC50Hz 1500V / min, no breakdown blinding (Normal State) |
| Life cycle | ≥100000 times |
| Contact type | Normally closed or Normally open |
| Two kinds of mounting bracket | movable or immovable |
| Terminal type | a. Terminal type: 187series of 4.8*0.5mm and 4.8*0.8mm, 250 series of 6.3*0.8mm b. Terminal Angle: bending angle: 0~90°C optional |
| House | plastic or ceramic. |
| Temperature sensor face | aluminum cap or copper head. |
KSD302 thermal switch Application
It is used as temperature control for household electric appliances and widely applied in coffee pots, automatic toasters, laminators, electric water pots, steam guns, steam irons, wind warmers, microwave ovens, water dispensers, etc.
| 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℃ |
| 0℃+-5℃ | -10℃+-5℃ | 110℃+-5℃ | 90℃+-10℃ | 220℃+-5℃ | 190℃+-10℃ |
| 5℃+-5C | -5℃+-5℃ | 115℃+-5℃ | 95℃+-10℃ | 225℃+-5℃ | 195℃+-10℃ |
| 10℃+-5℃ | 0℃+-5℃ | 120℃+-5℃ | 100℃+-10℃ | 230℃+-5℃ | 200℃+-10℃ |
| 15℃+-5℃ | 5℃+-5℃ | 125℃+-5℃ | 105℃+-10℃ | 235℃+-5℃ | 205℃+-10℃ |
| 20℃+-5℃ | 5℃+-5℃ | 130℃+-5℃ | 110℃+-10℃ | 240℃+-5℃ | 210℃+-10℃ |
| 25℃+-5℃ | 10℃+-5℃ | 135℃+-5℃ | 115℃+-10℃ | 245℃+-5℃ | 215℃+-10℃ |
| 30℃+-5℃ | 15℃+-5℃ | 140℃+-5℃ | 120℃+-10℃ | 250℃+-5℃ | 220℃+-10℃ |
| 35℃+-5℃ | 20℃+-5℃ | 145℃+-5℃ | 125℃+-10℃ | 255℃+-5℃ | 225℃+-10℃ |
| 40℃+-5℃ | 25℃+-5℃ | 150℃+-5℃ | 130℃+-10℃ | 260℃+-5℃ | 230℃+-10℃ |
| 45℃+-5℃ | 30℃+-5℃ | 155℃+-5℃ | 130℃+-10℃ | 265℃+-5℃ | 235℃+-10℃ |
| 50℃+-5℃ | 35℃+-5℃ | 160℃+-5℃ | 135℃+-10℃ | 270℃+-5℃ | 240℃+-10℃ |
| 55℃+-5℃ | 40℃+-5℃ | 165℃+-5℃ | 140℃+-10℃ | 275℃+-5℃ | 245℃+-10℃ |
| 60℃+-5℃ | 45℃+-5℃ | 170℃+-5℃ | 145℃+-10℃ | 280℃+-5℃ | 250℃+-10℃ |
| 65℃+-5℃ | 50℃+-5℃ | 175℃+-5℃ | 150℃+-10℃ | 285℃+-5℃ | 255℃+-10℃ |
| 70℃+-5℃ | 55℃+-5℃ | 180℃+-5℃ | 155℃+-10℃ | 290℃+-5℃ | 260℃+-10℃ |
| 75℃+-5℃ | 60℃+-5℃ | 185℃+-5℃ | 155℃+-10℃ | 295℃+-5℃ | 265℃+-10℃ |
| 80℃+-5℃ | 65℃+-5℃ | 190℃+-5℃ | 160℃+-10℃ | 300℃+-5℃ | 270℃+-10℃ |
| 85℃+-5℃ | 70℃+-5℃ | 195℃+-5℃ | 165℃+-10℃ | Or according to client’s request | |
| 90℃+-5℃ | 75℃+-5℃ | 200℃+-5℃ | 170℃+-10℃ | ||