The Siemens SENTRON 5SP5292-7CC is a 2-pole DC miniature circuit breaker rated 125 A with a C tripping curve, designed for 250 V DC systems and a breaking capacity of 10 kA per IEC 60947-2 at DC. The C-curve characteristic means the magnetic trip activates at 5 to 10 times rated current, suited for moderate inrush loads like DC motor drives, solenoid banks, or capacitor charging circuits where nuisance tripping from startup current must be avoided. Rated IP20 with connected conductors, it is intended for installation inside a panel or enclosure — not for wet or washdown environments. The 2-pole design breaks both the positive and negative DC rail, providing full isolation on fault.
Mounting and integration
Mounts on standard DIN rail (35 mm) or via screw fixing in any orientation. Occupies 3 modular width units at 54 mm wide. Tunnel terminals top and bottom accept conductors typical for 125 A — verify lug sizing against your wire gauge. Installation depth is 70 mm; ensure enclosure depth clearance beyond that for wiring and heat dissipation. The supply cord entry is not arbitrary — observe the marked line/load orientation on the device.
Environmental and mechanical ratings
Operates from -40 °C to +75 °C with periodic humidity up to +55 °C at 95 % RH. Shock-rated to 150 m/s² at 11 ms half-sine and vibration-rated to 50 m/s² at 25–150 Hz and 60 m/s² at 35 Hz, making it suitable for installation on machinery or in transportation equipment subject to moderate vibration. Halogen-free and silicon-free construction reduces corrosive outgassing in enclosed panels. Sealable — provision for a lead seal or lockout tag on the toggle to prevent unauthorized operation. Mechanical service life is 10,000 operating cycles typical. Pollution degree 3 and overvoltage category 3.