DC-rated single-pole MCB for control panels
The Siemens SENTRON 5SP5180-7CC is a 1-pole miniature circuit breaker rated for 220 V DC with a C tripping characteristic and an 80 A current rating at 40 °C ambient. It breaks 10 kA at 220 V DC per IEC 60947-2, which covers most industrial DC bus and battery-string fault scenarios you'll meet on a panel line. The C-curve means it trips between 5 and 10 times rated current — a good fit for moderate inrush loads like DC contactor coils, solenoid valves, and small DC motor drives where you don't want nuisance trips from startup current but still need fast clearing on a hard short. At 45 °C the continuous rating drops to 76.27 A, at 50 °C to 72.34 A, and at 55 °C to 68.19 A — so if this breaker lives in a hot enclosure next to a drive or transformer, size the load accordingly or you'll get thermal trips on a warm day.
Mounting and panel fit
Snaps onto standard DIN rail (35 mm) or fixes with screws — either way, the mounting position is unrestricted, so you can lay it sideways in a shallow enclosure if needed. It takes 1.5 modular width units (27 mm wide), which is narrower than a standard 2-pole but wider than a typical single-pole AC breaker, because the DC arc-chamber needs room. Installation depth is 70 mm, matching the depth dimension. Tunnel terminals top and bottom accept the conductors; the breaker is sealable for metering applications where tamper evidence matters. Touch protection is built in, so you don't need extra finger guards on the busbar connections.
Environment and durability
Rated for pollution degree 3 and overvoltage category III, so it's comfortable in industrial control panels — not just clean switchgear rooms. The IP20 rating with connected conductors is standard for panel-mount breakers; it's not a washdown part, but it will survive the dust and humidity of a typical machine builder's cabinet. Halogen-free and silicon-free construction matters if the panel goes into a clean room or semiconductor fab. Shock-tested to 150 m/s² at 11 ms half-sine, and vibration-tested to 50 m/s² at 25–150 Hz and 60 m/s² at 35 Hz (4 sec). That's enough for most rotating equipment and conveyor lines — it won't rattle loose on a pump skid or a compressor package. Mechanical life is 10,000 switching cycles typical, which is fine for a branch-circuit protector that cycles infrequently.