HCET-B Thermal Protector HCET-A Series Kw9700 Thermostat Temperature Controller

BW & BH series protectors provide protection against over-current and over-temperature with firm sealing, small internal resistance, no noise, and automatic reset functionality. When current passes through the temperature and current-sensitive bimetal, the bimetal's status changes due to over-temperature or over-current conditions, either cutting off or switching on the circuit. BH series offer enhanced safety compared to normal protectors, as there is no temperature effect lag under sudden high current conditions.

BH series thermal protectors are effective, reliable security protector and alarm devices, widely used in various types of 1.5 horsepower motors, lighting devices, inverter welding machines, switch power supplies, rechargeable battery packs, fluorescent lamp ballasts, portable power tools, electric appliances and other electric equipment to prevent over-current and over-heating caused by abnormal work status. Enforced types that can withstand pressure of 3.5MPa are suitable for build-in installation of plastic coated motors.

BW serial universal and enhanced protectors with large metal casing are composed of thermal conductive metal casing, bimetallic parts welded with silver alloy contact points, conductive bracket, insulation fixation stand, fixed contact strip and heat resistance cable. In case of abnormal operation, when the environment temperature increases to the set value, the bimetallic parts perform quick action, open the contact points, and disconnect the circuit. When the device cools to the safe operation temperature, the contact points automatically close and recover normal operation.

• Switch type: normally closed, normally opened
• Operating Voltage / Current: AC250V / 5A; AC125V / 8A
• Operating Temperature: 40~150℃ (one step for every 5°C)
• Standard Tolerance: ±3°C / ±5°C / ±7°C
• Reset temperature: operating temperature decrease by 15-45°C
• Contact Closure resistance: ≤50mΩ
• Insulation resistance: ≥100mΩ
• Electric strength: AC1500V/1min free from phenomena of break down and flashover
• Service life: 10000 times

BW series is applicable to rechargeable batteries, ballasts, massagers, motors, transformers, electric tools, heat electric appliances and instruments.

The product has UL, CQC, VDE and RoHS certification approval.