Three-function reflowable circuit protection device

A circuit protection device comprising:

• a substrate comprising a first electrode and a second electrode;
• a heater element in electrical communication with the first and second electrodes;
• a sliding contact slidably positioned on the substrate, wherein:
• at a first location on the substrate the sliding contact provides a conductive path between the first electrode, second electrode, and the heater element, and
• at a second location on the substrate the sliding contact does not provide a conductive path between any of the first electrode, second electrode, and the heater element;
• a spring element configured to exert on the sliding contact a force parallel to a length of the substrate that slides the sliding contact to the second location upon detection of an activation condition, and
• a restraining element configured to secure the sliding contact at the first location, wherein application of an arming current through the restraining element causes the restraining element to break and place the circuit protection device in an activated state.

A circuit protection device comprising:

• a substrate comprising a first electrode and a second electrode;
• a sliding contact positioned on the substrate, wherein:
• at a first location on the substrate the sliding contact provides a conductive path between the first and second electrodes, and
• at a second location on the substrate the sliding contact does not provide a conductive path between the first and second electrodes;
• a spring element configured to exert on the sliding contact a force parallel to a length of the substrate, and
• a restraining element configured to secure the sliding contact at the first location,
• wherein at the first location the sliding contact is configured to resist the force exerted by the spring element until detection of an activation condition,
• wherein upon detection of an activation condition, the force exerted by the spring element moves the sliding contact to the second location, and
• wherein application of an arming current through the restraining element causes the restraining element to break and place the circuit protection device in an activated state.