Auto Reset Thermal Fuse with Bimetallic Thermostat for Over-Current Protection and Normally Closed/Open Function

BW & BH series thermal fuses provide reliable protection against over-current and over-temperature conditions. These sealed units feature small internal resistance, operate silently, and reset automatically. The temperature-sensitive bimetal component responds to abnormal conditions by changing state to either cut off or restore the circuit.

BH series thermal protectors are effective security devices used in:

• 1.5HP motors
• Lighting devices
• Inverter welding machines
• Switch power supplies
• Rechargeable battery packs
• Portable power tools
• Various electric appliances

Enforced types (3.5MPa pressure rating) are suitable for plastic-coated motor installations.

These universal protectors feature large metal casings containing thermal conductive components, bimetallic parts with silver alloy contacts, conductive brackets, and insulation stands. During abnormal operation, rising temperatures trigger the bimetallic components to open the circuit, which automatically resets when safe temperatures are restored.