The E-T-A 1170-21-8A is a compact, single-pole thermal circuit breaker specifically engineered for extra low voltage wiring systems in vehicles and marine craft. It incorporates a push-to-reset, tease-free, trip-free, snap-action mechanism, along with a separate manual release for enhanced safety and control. The breaker's blade terminals facilitate plug-in mounting, and it adheres to SAE J 553 Type III standards. Ideal for automotive applications, this circuit breaker offers a balance of protection and cost-effectiveness, making it a reliable choice for a variety of electrical systems.