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H31 thermal fuse KSD301 auto reset thermal fuse KI31 thermal switch KSD301

Categories KSD301 Bimetal Thermostat
Brand Name: HENGHAO
Model Number: KSD301
Certification: UL
Place of Origin: CHINA
MOQ: 1000PCS
Price: USD 0.1
Payment Terms: T/T
Supply Ability: 1000000PER MONTH
Delivery Time: 5~8WORKDAYS
Packaging Details: 2100PCS/CARTON
Life Cycle: 100000 cycles
Voltage & Current: 250V 16A
Contact type: normally closed or normally open
Switch type: auto reset or manual reset
temperature range: 0-250℃
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H31 thermal fuse KSD301 auto reset thermal fuse KI31 thermal switch KSD301

KSD301 thermostat / bimetal thermal protector / KSD301 temperature protector

KSD301 temperature protectors 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 thermostats specification

Voltage & CurrentAC 125V max 15A; AC250V 5A 10A 15A max 16A
ActionTemperature0~250℃
Recovery and action temperature difference0 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 resistancAC50Hz 1500V / min, no breakdown blinding (Normal State)
Life cycle≥100000 times
Contact typeNormally closed or Normally open
Two kinds of mounting bracketmovable 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

Houseplastic or ceramic.
Temperature sensor facealuminum cap or copper head.

KSD301 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.

KSD301 bimetal thermostats 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℃

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


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