The Siemens 3VA9114-0RS10 is a SENTRON RCD310 residual current protective module — a side-mounted accessory for 3VA1 molded-case breakers. It's a type A RCD (pulsating DC and AC sinusoidal fault detection), rated 160 A operational current at 50/60 Hz, 4-pole, with selectable residual current thresholds from 0.03 A up to 5 A via seven fixed steps. The design includes a pre-alarm indication at 30% of the set IΔn, giving maintenance a heads-up before a nuisance trip stops the line. The infeed position is flexible — top or bottom — which simplifies panel layout when the breaker bus is already wired. Sealable front cover is standard for lockout/tagout compliance.
This module is designed for screw fixing directly to the side of a 3VA1 breaker. It's not a standalone DIN-rail device — it integrates mechanically and electrically with the breaker's terminal connection. The dimensions (187 mm height, 131.8 mm width, 70 mm depth) are a direct fit against the 3VA1 frame; no additional panel space beyond the breaker's own footprint is required. Front-side protection is IP40, adequate for enclosed panel installations where tools or fingers might contact the front but not for washdown zones.
This is not a second-source for any other RCD module — it's purpose-built for the 3VA1 platform. If your panel is built around a different breaker family, the mechanical interface and terminal connection won't match.