MICROTEMP Features:

• Globally certifi ed temperatures and electrical loads

• One-shot operation cuts off electrical power

• Current interruption capacity up to 25 amps @ 250VAC

• Low resistance

• Compact size

• RoHS compliant

Operating Principle

The active trigger mechanism of the thermal fuse is an exclusively formulated, electrically nonconductive pellet. Under normal operating temperatures, the solid pellet holds spring loaded contacts closed. When a predetermined temperature is reached, the pellet melts, allowing the compression spring to relax. The trip spring then slides the contact away from the lead and the circuit is opened.

After the thermal fuse opens a circuit, the fuse needs to be replaced. This replacement procedure must include correction of the fault condition before the product is operated again.