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AC250V Automatic Bi-metal ksd301 thermostat(250v/10a) For Laminator , Heater Of Auto Seat
KSD301 Description
KSD301 Structure and application:
KI-31 serial products are the temperature controllers taking bimetallic strip as the temperature-sensing unit. In case of normal operation the electrical appliance, the bimetallic strip is in a free state; the contact point is in a state of close/open. When the temperature reaches the action temperature, the bimetallic strip performs quick action generates caused by internal stress due to heating; open/close the contact point; disconnect/connect the circuit; thus, the temperature is in control. When the electrical appliance is cooled to the recovery temperature, the contact point automatically opens/closes to recover normal operation state.
Widely used in electrical heating appliances like water dispenser, water heater, sandwich bread baker, dishwasher, dryer, sterilizing cupboard, micro-wave oven, electric heating coffee pot, electric cooker, refrigeratory, air-conditioner, laminator, heater of auto seat.

The principle of this button like thermal protector is that ,the bimetal which is key component of this device
sensed the temperature of the corresponding machine, when the temperature it sensed increased to the
rated action temperature, the bi-metal will snap action in very short mment. When bimetal snap action ,it will
push the active contact point to take action ,in this way, the circuit is on or off .
Automatic thermostat technical parameters:
1.Electrical strength: No spark or breakdown for 1min at AC 50Hz 1800V
2.Action temperature range: 45~160 (Optional); temperature accuracy: ±2 ±3 ±5 ±10
3.Recovery and action temperature difference: 8~100 (Optional)
4.Connection method: Insert the terminal 250# (bending angle: 0~90° optional); Insert the terminal 187# (bending angle: 0~90° optional; thickness: 0.5, 0.8mm optional)
5.Lifespan: ≥100,000 times
6.Electrical parameters:1)CQC,VDE,UL,CUL AC250V 50~60Hz 5A/10A/15A (Resistance load)
2)UL AC125V 50Hz 15A (Resistance load)
7.Contact resistance: ≤50mΩ
8.Insulation resistance: ≤100MΩ
Junction method: Constant-closed: the contact point disconnects when temperature rises; and contact point connects when temperature falls;
Constant-opened: the contact point connects when temperature rises; and contact point disconnects when temperature falls.
10.Casing protective class: IP00
11.Grounding method: Connection is made between the metal casing of the temperature controller and the metal part of the grounding device.
12.Installation method: installed for KI031 series: general moving ring, mini round moving ring, flat moving ring general aluminum cover with mounting hole, extra length aluminum cover with mounting hole.
Characteristics:
Stable performance, high accuracy, small size, lightweight, high reliability, long lifespan, less interference to radio
Precautions:
1.When adopting contact temperature sensing installation, the surface of the metal cover is required to be securely contacted with the installing surface of the controlled device. For ensuring the temperature sensing effect, it is required to coat thermal conductive grease or other similar thermal conductive medium on the surface of temperature sensor.
2.For reliable performance, collapse, loose or distorted top part of the cover is prohibited during installation.
3.Liquid inleakage into the controller, crackle in the casing and unauthorized change of external terminal position are prohibited.
4.When the product is used in the circuit with maximum current of 5A, the cable with copper core at section 0. 5-1mm2 is required for connection; When the product is used in the circuit with maximum current of 10A, the cable with copper core at section 0.75-1.5 mm2 is required for connection;
5.The product should be kept in a clean, dry and corrosive gas-free warehouse with good ventilation and at relative humidity below 90%, environment temperature below 40.
KSD301 Features
1. Longevity
2. High precision
3. Anti-EMC testing
4. No flashover
5. Small size
6. Stable performance
7. Small differention temperature
8. Different types of bracket
9. Different materials of body case
10. Different types of terminal
Applications:

Specification
Technical Data
Electrical Rating | Rated Voltage : AC 250V / 125V , DC 24V | Circuit Resistance | ≤50mΩ initial value |
Differential | -30℃ - 300 ℃ or customized according to customers | Insulation Resistance | ≥100MΩ ( DC 500V normal state ) |
Temp. Tolerance |
±3 ±5 ±10℃ or requirement of customers | Dielectric Strength | AC 50Hz 1800V No breakdown blingling ( normal state ) |
Life cycle | ≥ 100,000 |
Electrical Rating :
Model Type | Cylces | Electrical | Certification |
KSD 301 | 100,000 | 250VAC / 10A 125VAC / 16A | CQC/ CB |
100,000 30,000 | 125VAC / 10A 24VDC / 10A 125VAC / 16A | UL / CUL | |
100,000 | 250VAC / 10A | TUV | |
30,000 | 250AC / 16A | VDE |
Standard Tolerance for Automatic Reset
Temperature Range | Differential | Open Toleracne | Close Tolerance | ||||
℃ | ℉ | ℃ | ℉ | ℃ | ℉ | ℃ | ℉ |
-15 – 40 | 8 – 104 | 10 | 20 | ±4.0 | ±7.5 | ±5.0 | ±9.0 |
41 – 90 | 105 – 194 | 10 – 15 | 20 -25 | ±4.0 | ±7.5 | ±5.0 | ±9.0 |
91 – 195 | 195 – 383 | 15 – 20 | 25 –30 | ±5.0 | ±9.0 | ±7.0 | ±13.0 |
196 - 250 | 384 - 482 | 20 - 30 | 30 - 40 | ±8.0 | ±15.0 | ±10.0 | ±18.0 |
Standard Tolerance for Manual Reset :
Temperature Range | Open Tolerance | ||
℃ | ℉ | ℃ | ℉ |
0 – 60 | 32 - 140 | ±4.0 | ±7.5 |
61 – 160 | 141 – 320 | ±5.0 | ±9.0 |
161 - 210 | 321 - 410 | ±7.0 | ±13.0 |


Characteristic :
Long lifespan
High precision
Anti-EMC testing
No flash over
Small in size
Stable performence
Precise thermostat products , professionalized management , strong R&D support and creative marketing
thoughts contribute to unique KAIN thermostat brand globally . Our persistence on perfection pursuit to
product quality and full-progress track service to after-sale let us win high –end platform in developing
together with various well-known enterprises .
1. Small order quantity accepttable
2. Customise available
3. High quality & competitive price
4. Timely delivery : 7-10 workdays
5. Payment: T/T & Paypal etc.
6. Trade terms: FOB,EXW,CIF,CFR,CPT
Dongguan Wuge Electronics Technology Co., Ltd was founded by a group of enthusiastic technicians and sales force who have abundant experience in thermistor & temperature sensor & 17AME ST12 ST-22 thermal protector and highly motivated to serve customers.
Our goal in pursuing best and perfect that make us achieve continuous progress. And we are striving for professional hermistor
and temperature sensor manufacturer, customer-oriented and service- minded made us became customers’ preferred anufacturer.As one high-tech enterprises, we own independent R&D and manufacturing ,specializing in research, development,production and sell of thermistor and temperature sensor. Our advanced technology, innovative management idea and mechanism effectively ensured product performances steady and reliable. Compared with similar products at
home and abroad, our conventional performance indexes have reached advanced level.
At present , our main products including : NTC temperature sensor, glass encapsulation type NTC thermistor series, SMD NTC
thermistor series, high precision AT type thermistor (epoxy encapsulation). Widely used in household appliances (heat pump, air conditioners, refrigerators, electric heaters, electric kettles, washing machines, microwave oven, electric water heater, solar water heaters, water dispenser, rice cooker, induction cooker, bread machine, dishwasher, weather forecasting, etc.), industrial equipments (wet machine, boiler, automatic control equipment, instruments and meters, etc.), automotive, medical equipments, computer, energy-saving lamps, power panels, energy-saving power supply, communications equipment, high/medium/low temperature humidity field.
Q: What’s info we should provide for RFQ ?
A: Product specification : size,color ,electrical rating.temperature.quantity.etc. More is better !
Q : Sample available or not ?
A: Yes,of course. Some free samples would be provided but you would bear freight cost .
Q: Can you print our design logo on product ?
A: Yes, OEM/ODM supportable.
Q: Do you accept mall order or trial order ?
A: Yes
Q: What’s your payment terms ?
A: T/T , Western Union , Paypal , Cash .
Q: What’s your lead time ?
A: In general, 7-10 workdays to ensure quality !
Q: Could you help arrange shipment ?
A: Yes, we can offer you logistic services : Express/Air/Sea

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