Hold current and trip performance
Rated to hold 3 A continuous at 12 V, the 1206L300/12SLYR trips in 4 s at 6 A, clearing the circuit before downstream components exceed their fault-withstand rating. The 3 mOhms initial resistance keeps I²R losses low at the rated hold current. At 50 A maximum fault current, the device switches from low-resistance to high-impedance state, limiting the let-through energy to the protected load. The post-trip resistance climbs to 30 mOhms max, which holds the circuit in a latched-off state until power is cycled.
Package and board-fit
The concave termination profile suits automated pick-and-place and reflow soldering; the footprint matches standard 1206 land patterns. Surface-mount assembly on a standard FR-4 PCB with copper pad area matching the datasheet recommendation keeps the thermal resistance low enough for the device to self-heat and trip reliably under fault conditions.
Carries cURus and TUV approvals, confirming the device meets North American and European safety standards for overcurrent protection components.