Siemens SENTRON 5SJ4305-7HG41 miniature circuit breaker, C-curve, 3-pole, rated 10 kA and 15 kA breaking capacity. The C-curve characteristic provides short-circuit protection with a magnetic trip between 5 and 10 times In, suited for general-purpose loads including moderate inductive circuits.
Key ratings in practice
Breaking capacity of 10 kA and 15 kA provides headroom for most industrial panel feed points. Rated insulation voltage (Ui) 440 V AC covers common 400 V three-phase systems with safety margin. Dimensions of 54 mm width (3 modular units), 70 mm depth, and 110 mm height fit standard DIN rail and leave room for adjacent breakers and wiring in a crowded enclosure.
Environmental and mounting
Ambient temperature range from -40 to 75 °C covers cold storage or nearby heat sources. Sealable, halogen-free, and silicon-free construction suits food processing, medical, and cleanroom environments. Mounting position any, and IP20 with conductors connected (IP40 in handle area) allows flexible orientation inside a metal enclosure. Terminal tightening torque 3.5 Nm for copper conductors.