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Manual Mini KSD301 Bimetal Disc KSD301 Thermostat For Water Dispenser And Electric Heater
KSD301 Description
KSD301 , thermal protector is a kind heating protector with an open structure. It is ideal protectors for pet drier, industrial heating gun, and heaters, etc, for its prompt snap action and accurate cutout temperature.
At the heart of the device is a bimetal snap-action disc. When the temperature of this disc reaches its pre-calibrated temperature, it snaps open, resulting in an open circuit. This temperature is reached during a fault condition caused by an increase in ambient temperature. After the device breaks the circuit, the system cools and automatically resets allowing power to be restored to the circuit.
Contact capacity:
20A /24VDC 20A /125VAC 12A /250VAC
Temperature specification:
Open temperature: 50~150±5℃; one gear every 5℃.
ON-OFF differential >10℃
Cycles: 6000 cycles @ rated current and voltage.

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 .
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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