The Siemens 3VA9213-0RS20 is a SENTRON RCD510 Basic residual current protection module — a type A RCD designed as a side-mounted accessory for 3VA1 molded-case breakers with terminal connection. It provides adjustable ground-fault protection for the downstream circuit, with a rated operational current of 250 A at AC and a selectable residual current trip threshold from 0.03 A up to 5 A.
The 3-pole construction matches a 3-phase feeder. The 250 A rating means it pairs with a 3VA1 breaker of equal or higher frame current — the RCD module itself carries the full load current without derating for the accessory slot. The adjustable residual current range (0.03; 0.05; 0.1; 0.3; 0.5; 1; 3; 5 A) covers both personnel protection (30 mA) and equipment/fire protection (300 mA to 5 A) in a single module, so you can set the sensitivity per circuit without stocking multiple variants. The non-trip time is also adjustable (0; 0.06; 0.15; 0.3; 0.5; 1.0; 2.0; 3.0 seconds), allowing selectivity coordination with downstream RCDs — set a longer delay on this upstream module to avoid nuisance tripping on transient faults.
This module mounts via screw fixing to the side of a 3VA1 breaker with terminal connection. The infeed can enter from the top or bottom, simplifying busbar routing in a distribution panel. The pre-alarm indication at 30% of the set residual current gives early warning of deteriorating insulation before a trip event, useful for predictive maintenance in continuous-process lines.
The 3VA9213-0RS20 carries an Active lifecycle status from Siemens. It is a current-production part in the SENTRON accessory range, not subject to phase-out or last-time-buy.