SIRIUS solid-state overload relay, size S00
The Siemens 3RB3113-4NE0 is a SIRIUS-brand solid-state overload relay in the compact S00 frame size, rated for a thermal current of 1.25 A at up to 690 V. It mounts directly onto a contactor via the fastening method, saving DIN-rail space in the panel. The spring-loaded terminals accept 2x (0.25 to 1.5 mm²) solid or stranded wire, so termination is tool-less and vibration-resistant — a real time-saver on a crowded sub-panel. The relay's trip class is field-adjustable among CLASS 5E, 10E, 20E, and 30E, which lets you match the thermal memory to the motor start profile — fast trip for short acceleration times, slow for high-inertia loads. The tripped condition is signaled via a dedicated message output (note: for message "tripped"), a detail that matters when wiring the alarm into a PLC or annunciator.
The relay fastens directly to the contactor — no DIN-rail adapter needed — so the assembly stays compact and the power wiring between contactor and overload is internal to the stack. The main circuit uses spring-loaded terminals (screwdriver shaft diameter 5 to 6 mm, Pozidriv PZ 2 tip). The auxiliary contact ratings cover common control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.55 A at 60 V — enough for most PLC input or relay coil circuits.
The 3RB3113-4NE0 is listed as current-production (active lifecycle stage). No official successor has been announced, and the part remains in the active SIRIUS catalog. Substance prohibitance per the ledger is dated 10/01/2009, indicating RoHS and REACH compliance documentation is available from the manufacturer for this production date. The relay carries no UL or CSA mark in the evidence, so verify site-specific listing requirements with your local authority.