Motor protection sizing — 200 A continuous, Class 20E trip curve
The 3RB2056-2FC2 is a SIRIUS solid-state overload relay rated at 200 A continuous thermal current (Ith) and 200 A operational current in AC-3e duty at up to 1,000 V. That 200 A figure sets the motor FLA ceiling for this S6-size frame — it protects the branch circuit without needing an external CT for currents up to that level. Class 20E means the relay allows up to 20 seconds of locked-rotor current before tripping — a good match for standard induction motors driving pumps, fans, or conveyors where the start-up transient is moderate. The electronic overload release design gives a repeatable trip curve without the ambient-temperature drift you get with bimetal units. The auxiliary switch is integrated and rated for switching at multiple control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.55 A at 60 V, among others. These ratings cover both 24 VDC PLC inputs and 120 VAC relay coils — confirm the control circuit voltage against the table before wiring.
Panel fit and mounting — S6 frame, 120 mm wide, any position
The S6-size relay measures 120 mm wide by 119 mm high by 155 mm deep. It mounts directly on a contactor or as a stand-alone unit on the DIN rail — the fastening method accepts either, which simplifies panel layout when you need to group the starter components or distribute them across the enclosure. Mounting position is unrestricted, and the operating temperature range is -25 to +60 °C with full temperature compensation — no derating needed for warm cabinet environments within that band. Vibration resistance is 1–6 Hz at 15 mm amplitude and 6–500 Hz at 20 m/s² for 10 cycles; shock resistance is 15 g for 11 ms, so it holds up on high-vibration machine frames. Main circuit connections are via busbar (M8 bolts), and the control/auxiliary terminals accept 1x 0.5–4 mm² or 2x 0.5–2.5 mm² solid or stranded wire. The S6 frame is physically larger than the S0–S3 sizes — check the panel cutout and gland plate clearance for the 155 mm depth before committing.
Sourcing and lifecycle — active part, quoted to order
Substance prohibitance date is noted as 07/01/2006 — this aligns with RoHS compliance for the European market. The relay is designed per IEC 60068-2-27 for shock and IEC 60068-2-6 for vibration, so it meets the typical industrial control panel requirements for environmental testing.