2-pole D-curve MCB for branch-circuit protection
The Siemens 5SJ4260-8HG41 is a 2-pole SENTRON miniature circuit breaker with a D-curve, rated 60 A at AC, and sized for industrial panel installations where high inrush tolerance and vibration resistance are required. The DC rating is 60 V maximum, making this breaker suitable for DC control circuits and small battery banks within that voltage limit.
Panel fit and mounting
Occupies two modular width units (36 mm total) on a standard DIN rail. Mounting position is unrestricted; the 70 mm installation depth leaves wiring room behind the breaker. Combined terminals top and bottom accept conductors; tunnel terminals are not available. Terminal tightening torque is specified at 3.5 Nm for copper conductors at 60/75°C. Protection rating: IP20 with conductors connected, IP40 at the handle area. Sealable cover is provided for tamper‑proof installation.
Environmental and compliance
Rated for ambient temperature from -40°C to 75°C, with vibration resistance up to 50 m/s² (25–150 Hz) and 60 m/s² at 35 Hz. Suitable for mechanical engineering and industrial environments.