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The SMD0805L-400-12V is a high-performance surface-mount polymeric PTC resettable fuse optimized for applications requiring high hold current in a compact 0805L package. Rated at 4.0A hold current and 12V maximum voltage, it quickly transitions to a high-resistance state during fault conditions and automatically resets once the fault is cleared. With low resistance, fast response and RoHS-compliant construction, it is ideal for power distribution, battery protection, industrial control and high-current consumer electronics.