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Dongguan Heng Hao Electric Co., Ltd
Bimetallic thermostat,thermal switch,thermal motor protector,thermal fuse,thermo-switch
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H31 car oil temperature controller,H31 thermostat for automobile cooling fan

Dongguan Heng Hao Electric Co., Ltd
Dongguan Heng Hao Electric Co., Ltd
City: Dongguan
Province/State: Guangdong
Tel: 86-0769-82657123
Contact Person:
Mrs. Cherry Lee

H31 car oil temperature controller,H31 thermostat for automobile cooling fan

Place of Origin : DONGGUAN,CHINA
Brand Name : HENGHAO
Certification : UL CQC TUV ROHS
Model Number : H31
MOQ : 1000PCS
Price : US$0.2-0.3 PER PC
Packaging Details : 1650 PCS PER CARTON
Delivery Time : 7-10 WORKING DAYS
Payment Terms : TT FOB SZ
Supply Ability : 1000000PCS PER MONTH
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KSD301 thermostat / bimetal thermal protector / KSD301 temperature protector

1. KSD301(H31) temperature protector’s 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.

2. KSD301 (H31) thermostat’s specification

2.1. Electrical Rating: AC 125V max 15A; AC250V 5A 10A 15A max 16A

2.2. Action Temperature: -10~300 degree

2.3. Recovery and action temperature difference: 10 to 25 degrees, or according to client's request.

2.4. Temperature deviation: +-3 / +-5 / +-10 degree or according to client's request

2.5. Circuit resistance: ≤50mΩ (Initial value)

2.6. Insulation resistance: ≥100mΩ (DC500V Normal State)

2.7. Dielectric Strength: AC50Hz 1500V / min, no breakdown blinding (Normal State)

Life cycle: ≥100000

2.8. Normally closed or open

2.9. Two kinds of mounting bracket: movable or immovable

2.10. Terminal

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

2.11. Two kinds of body: plastic or ceramic.

2.12. Two kinds of temperature sensor face: aluminium cap or copper head.


3. Difference of auto reset type and Manual reset type

3.1. Manual reset type: Temperature sensing components consist of bimetallic strip. When the temperature reached the action temperature range, it will jump quickly and the movable disc disconnects. When the temperature declines to a fixed temperature point, the contact point cannot reset until reconnecting the circuit by pushing the reset button. And then the contact points recover, reaching a purpose of connecting or disconnecting the circuit and restarting the circuit by manual reset. (Kindly reminder: 1.This type of manual reset thermostat can reset when the temperature declines 20 °C after snap action by pressing the reset button. And 4~6 N will be advisable; please don’t use too much strength. 2. To ensure the normal function, the distance between the reset button and the close cover should not be less than 20.4mm. )

3.2. Manual reset type: Temperature sensing components consist of bimetallic strip. When the temperature reached the action temperature range, it will jump quickly and the movable disc disconnects. When the temperature declines to a fixed temperature point, the contact point can auto reset and start working.

4. KSD301 (H31) bimetal thermostat’s 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 temperature & reset temperature

1. According to customer’s request to set the open temperature and reset temperature.

2. The standard open temperature and reset temperature’s sheet for auto reset type as below

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℃+-5℃

-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℃



90℃+-5℃

75℃+-5℃

200℃+-5℃

170℃+-10℃




The product UL,CQC,VDE and RoHS certification approval.



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