What it is and what it does
The Siemens 3RV2332-4TC10 is a SIRIUS-brand circuit breaker designed specifically for starter combinations — meaning it integrates motor branch-circuit protection and disconnecting means in one device, sized to coordinate with a contactor and overload relay in a motor starter assembly. It mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, in any mounting position, which simplifies panel layout and allows dense packing. Breaking capacity is rated 100 kA at 240 V, 50 kA at 400 V, 10 kA at 500 V, and 5 kA at 690 V — the 50 kA at 400 V is the figure most relevant for standard industrial three-phase distribution in IEC markets, telling you it can clear a fault up to that level without upstream fuses or a larger breaker.
Ratings that decide fit
Motor horsepower ratings are given per voltage: 3 hp at 230 V, 7.5 hp at 220/230 V, 15 hp at 460/480 V, and 17 A at both 480 V and 600 V — so for a 15 hp 480 V motor this breaker lands right on the nameplate current with no oversizing penalty. The screw-type terminals for the main current circuit accept 2x 1–35 mm² or 1x 1–50 mm² solid or stranded copper, with M6 bolts — that's substantial wire range for a 50 kA device, accommodating feeds from a 50 mm² supply cable down to a 1 mm² tap. No ground-fault or phase-failure detection built in — this is a straightforward magnetic-thermal motor circuit protector; those functions, if needed, must come from the attached overload relay or a separate module.
Lifecycle and sourcing reality
The lifecycle stage is marked as current, meaning Siemens continues to manufacture and support this order code — no end-of-life notice, no last-time-buy window.
Integration into the panel
Dimensions are 55 mm wide, 140 mm high, 149 mm deep — the 55 mm width is a single modular unit on the DIN rail, leaving room for adjacent contactors and relays in a motor starter row. Clearance requirements: 50 mm upwards and downwards, 10 mm to the side, zero forwards and backwards — so you can butt it against the back panel and the enclosure door, saving depth in shallow cabinets. Operating temperature range is -20 to +60 °C, storage/transport -50 to +80 °C — fine for most indoor industrial enclosures; if the panel sits in an unheated warehouse, the storage range covers handling during winter shipping.