通常开放的是什么 (不) 恒温器开关KSD301?

恒温器开关KSD301双金属盘在通常打开的 (不) 配置. 这意味着电路最初是打开的 (断开连接) 在正常温度下. 当温度升至预定义的阈值时, 双金属圆盘弯曲, 关闭电路并允许电流流动.

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

UXCELL KSD301恒温器40°C/104°F 10A通常打开N.O调整快照温度开关

我. 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:
额定电压: 交流250V (阻性负载) or AC 125V (UL standard)
额定电流: 5A/10A/15A (阻性负载)
‌Temperature performance‌:
Action range: 0℃~300℃ (可定制), accuracy ±2℃~±10℃17
Reset and action temperature difference: 8℃~100℃ (adjustable)
‌Mechanical characteristics‌:
接触电阻: ≤50mΩ, 绝缘抗性: ≥100MΩ13
电气强度: AC 1800V/1min without breakdown
使用寿命: ≥100,000 times17 (some models up to 150,000 times2)

‌Physical characteristics‌
防护等级: 防护等级00 (no dust and water resistance)
接线方式: 插件终端 250# 或者 187# (angle 0°~90° optional)
安装方法: supports various structures such as movable ring, flat ring, aluminum cover with holes, ETC.

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:
随着温度升高, 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.

自动复位:
Once the temperature drops below a certain level, 双金属盘恢复其原始形状, opening the circuit again and cutting off the current flow. This is an automatic reset feature.
In essence, 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.

二. 应用场景
‌Household appliances‌: 饮水机, electric thermos, 微波炉, 消毒柜, 电加热器, 咖啡机, ETC.
‌Industrial equipment‌: 电机过热保护, rectifier equipment, 层压机, car heated seats, etc.57.

三、. Detection method (determine whether it is normally open)
‌Multimeter detection‌:
室温下 (‌below the action temperature‌): the resistance of the two pins should be infinite (开路).
After heating (‌above the action temperature‌): the resistance value drops to ‌tens of ohms‌ (开路).
‌Marking distinction‌: The product body is usually marked with “不” (常开) 或者 “常开”.

四号. 产品优势
响应速度快, clean contact action without arcing57;
控温精度高, strong reliability7;
结构紧凑, strong adaptability17.

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