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Structure and application

KSD301 series product is a kind of thermostat which adopt the bimetal disc as the temperature sensing element. The bimetal disc is in free state and the contacts are closed/open when the electrical appliance is working in normal condition. When the ambient temperature raises to the preset operating temperature, the contacts open/close as the bimetal disc deforms to jump when being heated, then the circuit is cut off/on to control the temperature. Then the contacts will close automatically to cut on the circuit when the electrical appliance is cooled down to the reset temperature, This product is widely used in water dispenser, electrical water boiler, disinfecting cabinet, electrical heating vacuum flask, electrical coffee kettles, rice cooker, air conditioner and etc.

Features: Stabilized performance, high precision temperature controling small bulk, light, high reliability, and little interference to wireless, etc.

Technical parameters

●Electrical performance:

1.VDE、CQC、UL、TüV AC250V 50-60Hz 10A(resistant load)

2.UL AC125V 50-60Hz 15A(resistant load)

●Operating temperature range: 0-210℃ optional, tolerance: ±2-5%

●Difference between reset temperature and operating temperature: 3-100℃

●Terminal type: insert terminal 250 # (bowlegged, 0-90℃ optional); insert terminal 187 # (bowlegged, 0-90℃ optional) thickness: 0.5mm、0.8mm optional

●Durability :

1.VDE、UL、100,000 cycles

2.CQC、TüV 10,000 cycles

●Electrical strength: no breakdown and flashover under AC 1500V for 1 min

●Contact resistance: ≤50 mΩ;

●Isolation resistance: >100 MΩ;

●Contact styles: Normal closed type: the contacts open when temperature raises, and close when temperature falls down, normal open type: the contacts close when temperature raises, and open when temperature fall down.

●The shell protection grade: lp00.

●Grounding type: connect the metal shell of the thermostat with the grounded metal parts. 

●Installation type: KSD301 series installing loose bracket, install small portable rings, install board portable rings, big aluminium cover with installation hole, extra long aluminium cover with installation hole.


● Pending

○ Approvals

●Please keep the cap firm with the installation surface of the controlled appliance when install. Please wipe conduction silicon grease to the sensing surface in order to ensure effect of the temperature sensing.

●Never collapse, loosen or deform the top of cover surface during installation in order to avoid any influence to its performance.

●Never infiltrateany liquid into the thermostat, nor over press to crack the shell, no changing of the shape of exterior wiring terminal at free will.

●For products used in circuit at no more than 5A current, please choose the lead with cross-section surface of copper core falls within 0.5-1mm² for connection. And for those used in circuit at no more than 10A current, please choose the lead with corss - section surface of copper core falls within 0.75-1.5mm² for connection.

●Keep the product in clean dry warehouse at good ventilation and free of corrosive gas and with relative humidity less than 90% and ambient temperature under 40℃.