BW-BCM Thermal Protector Switch BW-WCP Temperature Controller BW-ECM Thermostat BW-DCM

BH series thermostat / Miniature thermal protector / Rechargeable battery thermostat

BW & BH series protectors provide protection against over-current and over-temperature conditions. They feature sealed construction, small internal resistance, no noise operation, and automatic reset functionality. When current passes through the temperature and current-sensitive bimetal, its status changes in response to over-temperature or over-current conditions, either cutting off or switching on the circuit. BH series protectors offer enhanced safety compared to standard protectors, as they eliminate temperature effect lag during sudden high current conditions.

BH series thermal protectors are effective and reliable security protection and alarm devices widely used in:

• 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 electrical equipment

These protectors prevent damage from over-current and over-heating caused by abnormal operating conditions. Enforced types capable of withstanding pressure up to 3.5MPa are suitable for built-in installation in plastic coated motors.

BW series universal and enhanced protectors feature large metal casings and 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. During abnormal operation, when environmental 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 safe operating temperature, the contact points automatically close and normal operation resumes.

• Switch type: Normally closed, normally opened
• Operating Voltage / Current: AC250V / 5A; AC125V / 8A
• Operating Temperature: 40~150℃ (5°C steps)
• 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 breakdown and flashover phenomena
• Service life: 10,000 cycles

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