The Siemens 3RV1011-0GA10-ZW95 is a SIRIUS motor protection circuit breaker designed for motor protection duty. It carries a CLASS 10 trip characteristic, meaning it disconnects within 10 seconds at 7.2× the thermal setting — the standard for standard-start induction motors on pumps, fans, and compressors where acceleration time stays under a few seconds. The 100 kA SCCR at 400 V AC means this breaker safely interrupts fault currents up to that level without upstream fuses needing to clear first, which simplifies coordination in a distribution panel.
SCCR and Backup Fuse Requirements
At 400 V and 500 V the breaker is rated 100 kA without requiring a backup fuse — that's the full rated short-circuit capacity. At 690 V it still delivers 100 kA, but the manufacturer calls for a gL/gG 6 A backup fuse in series. This is a coordination detail a panel designer needs on the single-line diagram: the same breaker, same SCCR, but the fuse requirement changes with line voltage. The 3RV1011-0GA10 (without the -ZW95 suffix) shares the same base ratings; the -ZW95 suffix indicates a special version, likely a customer-specific variant or a special setting range — the physical footprint and terminal layout are identical, so it drops into the same DIN rail slot without rewiring.
Mounting and Clearances
Snap-on mounting onto 35 mm DIN rail per DIN EN 60715. The 45 mm width matches the standard SIRIUS 3RV1 frame — it occupies one 45 mm module on the rail. Clearance requirements: 20 mm upward and downward, 9 mm to the side, 0 mm forward and backward. No extra spacing needed above or below for arc chute venting in a typical IP20 enclosure, but keep the 20 mm vertical gap for wiring access and heat dissipation. Screw-type terminals on the main circuit accept 2x (0.5 to 1.5 mm²) solid or stranded, or 2x (0.75 to 2.5 mm²) — M3 terminal screws.