Siemens 5SY4301-8 Circuit Breaker

Siemens 5SY4301-8 is a three‑pole, 400 V AC miniature circuit breaker with a 1 A rated current and a D‑type trip characteristic, designed for compact overcurrent protection in low‑voltage distribution panels. It measures 90 mm in height, 54 mm in width, and 76 mm in depth, with a mounting depth of 70 mm, and employs Siemens’ quick‑assembly mounting system for straightforward panel installation. The device provides a short‑circuit breaking capacity (Icn) of 10 kA at 400 V AC, making it suitable for protecting small to medium loads in 3‑phase circuits. This 5SY4301‑8 unit is intended for use in control cabinets, switchboards, and machine panels where reliable, predictable tripping behavior is required, and it is part of Siemens LV10 line of miniature circuit breakers. Common applications include protection of 3‑phase circuits in industrial and commercial electrical distributions, motor control circuits, and modular enclosure wiring, with no marketing claims or non‑essential data included.