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Contact: kevin li
Company: Dongguan Yaxun Electronic Hardware Product Co., Lt
Dongguan changping town bridge industrial zone 15 well
Dongguang 563200
Phone: +86 13827205356
Fax: +86 769 83811196
E-Mail: Send Inquiry
Date/Time:  9/12/17 4:13 GMT

resettable thermal switch

KSD series of temperature control after years of technology development, in order to adapt to the product of a variety of temperature control methods, in the Ya Xun, to meet the requirements of different customers, the development of a variety of temperature control products:
1. Automatic reset: changes or decreases with temperature, the internal contact is automatically disconnected or automatically closed.
2. Manual reset (anti-dry type): Mainly used in water heaters, when the temperature rises, the contact will automatically disconnect; when the controller temperature cooling, you must manually press the button to reset the contact again closed power.
3. Normally closed(NC): Electrical appliances work properly, the contact is closed, the thermostat is in power state, when the temperature reaches the operating temperature, the bimetallic sheet heat generated internal stress, and rapid action, open the contacts, cut off / on circuit, which play a role in temperature control.
4. Normally open type(NO): Electrical work, the contact is in the open state, the thermostat is in power state. When the temperature reaches the operating temperature, the bimetallic sheet heat generated internal stress, and rapid action, closed contact, connected to the cooling power supply, reducing the temperature of the heat generating element, which play a protective role.
5. Conventional electrical parameter type: 1) AC250V 50 ~ 60Hz 5A / 10A / 15A (resistive load)
2) UL AC125V 50Hz 15A (resistive load)
6. High power type (KSD302): AC250V or 400V; 50 / 60Hz
1) 16A; 20A; 25A; 30A; 35A
2) 50A; 55A; 60A;
7. Defrost type: Mainly used in refrigerator defrost control. In the compressor running to a certain time, Immediately after the temperature of the -14 ° C felt by the defrosting thermostat on the evaporator, turn on current, at this time defrost timer operation, defrosting heater began to work, when the defrost thermostat feel +5 ℃, the defrost thermostat contacts open, defrost thermostat (tube) to stop working.

Product Structure
KSD301 series of temperature control switch, the basic components of the thermostat accessories:
Shell (bakelite, ceramic), Aluminum cover (stainless steel cover, copper stud), Terminals, contacts, rivets, static contact, moving reed, Temperature sheet (bimetallic sheet) and so on, manufacturing a precision thermostat, need more than a dozen processes, assembled by automated mechanical equipment.
1, KSD301 shell (bakelite and ceramics)
2.KSD301, KSD302 aluminum cover (thermal and protective effect)
3.KSD301 terminal 6.3mm 4.8mm (connection \ conductive effect)
Ksd301 terminal block Terminal size AxB 4.8x0.5 4.8x0.8 6.3x0.8
Axial force N 50 60 70

4, the contacts (the contacts of silver and copper, silver dot product expensive)
5, rivets (connection and fixed)
6, the stationary contact piece (copper)
7, moveable spring (copper)
8, Temperature sheet (Bimetallic)

Product Technical Parameters And TerminologyThermal Switch Product Structure
KSD301 Thermostat A precision temperature controller. Products from design, production, to testing, are the standard technical requirements. In Ya Xun, an independent laboratory, by setting the thermostat industry standards to guide the market, when you contact our professional technical team, you first need to provide the technical parameters of the product design and installation. In order to achieve the best results, our engineers need to carefully study your product applications, so as to optimize the appropriate installation and temperature control. Which may include the addition of wiring to avoid the thermostat and the heating body is not close contact, affect the temperature control accuracy of the product. Please parameters My company's thermostat production standards:
GB / T14536.1-12008 Automatic controllers for household and similar purposes - Part 1: General requirements
GB14536.10-2008 Particular requirements for temperature sensitive controllers for automatic control of household and similar use
JB / T3751-1997 household and similar bimetallic temperature controller
Idt IEC730-1: 2008 UL873
1, electrical parameters: 1) CQC, VDE, UL, CUL, AC250V 50 ~ 60Hz 5A / 10A / 15A (resistive load)
2) UL AC 125V 50Hz 15A (resistive load)
2, the operating temperature range: 0 ~ 240 ℃ (optional), the temperature accuracy: ± 2 ± 3 ± 5 ± 10 ℃
3, the response and the action temperature difference: 8 ~ 100 ℃ (optional)
4, wiring method: plug terminal 250 # (bend 0 ~ 90 ° optional); plug terminal 187 # (bend 0 ~ 90 ° optional, thickness 0.5, 0.8mm optional)
5, the service life: ≥ 100000 times
6, electrical strength: AC 50Hz 1800V lasted 1min, no flicker, no breakdown
7, contact resistance: ≤ 50mΩ
8, insulation resistance: ≥ 100MΩ
9, contact form: Normally closed: temperature rise, contact open, temperature drop, contact connected;
Normally open: temperature rise, contact connected, temperature drop, contact open
10, the shell protection class: IP00
11, grounding: through the thermostat metal shell and metal parts connected to the device.
12, installation: with a mother or welding reinforcement.
13, the temperature range: -25 ℃ ∽ +240 ℃.
14, set the temperature setting temperature
The temperature target value set on the thermostat is automatically disconnected or turned on when the temperature rises or falls below the target value under normal operating conditions.
15, on-off temperature difference
The temperature difference between the automatic on and off circuit when the temperature is set on the thermostat.
16, working temperature
When the temperature is set to a certain temperature value on the thermostat, the temperature rise contact is open or on or the temperature drop contact is turned on or off to control the temperature value.
resettable thermal switch
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SOURCE: Import-Export Bulletin Board (
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