Шта је нормално отворено (НО) Термостатски прекидач КСД301?

Прекидач термостата КСД301 биметални диск ради у нормално отвореном (НО) конфигурацију. То значи да је коло у почетку отворено (искључен) на нормалним температурама. Када температура порасте до унапред дефинисаног прага, биметални диск се савија, затварање струјног кола и омогућавање протока струје.

Normally open THERM-O-DISC T-O-D THERMAL LIMIT SWITCH L160-40F 60TX01

UL/CUL KSD301 Shutoff Thermostat,Normally Open NO Bimetal Snap Disc 125V 16A Auto Reset

укцелл КСД301 термостат 40°Ц/104°Ф 10А нормално отворен Н.О Подешавање прекидача за температуру диска

Ја. Core Features
‌Operation Principle‌
When the temperature rises to the set value, the contact automatically connects the circuit; when the temperature drops to the reset value, the contact automatically disconnects the circuit, which is the opposite of the normally closed type (disconnected when the temperature rises and connected when the temperature drops).

The bimetallic strip is heated and deformed to trigger the mechanism to achieve fast switching.

‌Technical Parameters‌
‌Electrical Specifications‌:
Називни напон: AC 250V (отпорно оптерећење) or AC 125V (UL standard)
Називна струја: 5A/10A/15A (отпорно оптерећење)
‌Temperature performance‌:
Action range: 0℃~300℃ (customizable), accuracy ±2℃~±10℃17
Reset and action temperature difference: 8℃~100℃ (adjustable)
‌Mechanical characteristics‌:
Contact resistance: ≤50мΩ, отпор изолације: ≥100MΩ13
Electrical strength: AC 1800V/1min without breakdown
Service life: ≥100,000 times17 (some models up to 150,000 times2)

‌Physical characteristics‌
Protection level: ИП00 (no dust and water resistance)
Wiring method: plug-in terminal 250# или 187# (angle 0°~90° optional)
Installation method: supports various structures such as movable ring, flat ring, aluminum cover with holes, итд.

Normally Open State:
The KSD301 is designed to have its contacts in an open state when the surrounding temperature is below the specified operating temperature. This means the circuit connected to the KSD301 is broken, preventing current flow.

Temperature Trigger:
As the temperature increases, the bimetallic disc (made of two different metals bonded together) responds to the temperature change. The two metals expand at different rates, causing the disc to bend.

Circuit Closure:
When the temperature reaches the set point, the disc bends enough to close the circuit, establishing a connection between the contacts. This allows current to flow through the circuit.

Аутоматско ресетовање:
Once the temperature drops below a certain level, the bimetallic disc returns to its original shape, opening the circuit again and cutting off the current flow. This is an automatic reset feature.
У суштини, the KSD301 is used as a thermal switch to control current flow based on temperature, acting as a temperature sensor and protector for various applications.

Ии. Application scenarios
‌Кућни апарати‌: диспензери за воду, electric thermos, микроталасне пећнице, disinfection cabinets, electric heaters, Машине за кафу, итд.
Индустријска опрема: motor overheat protection, rectifier equipment, laminating machines, car heated seats, etc.57.

Иии. Detection method (determine whether it is normally open)
‌Multimeter detection‌:
At room temperature (‌below the action temperature‌): the resistance of the two pins should be infinite (отворено коло).
After heating (‌above the action temperature‌): the resistance value drops to ‌tens of ohms‌ (отворено коло).
‌Означавање разлике‌: The product body is usually marked with “НО” (Normally Open) или “Normally Open”.

ИВ. Product advantages
Fast response speed, clean contact action without arcing57;
High temperature control accuracy, strong reliability7;
Compact structure, strong adaptability17.

⚠️ Note: The actual selection needs to confirm the specific temperature threshold (such as 85℃, 95℃, итд.) and the reset temperature difference. The parameters of different models may vary.