{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2056-2FC2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2056-2FC2","canonicalUrl":"https://aoctrl.com/siemens/3RB2056-2FC2","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2056-2FC2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB2056-2FC2 solid-state overload relay, S6 size, 200 A rated operational current, Class 20E, for main current circuit busbar connection, contactor mounting or stand-alone installation.","salesMarkdown":"## 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.","metaTitle":"Siemens 3RB2056-2FC2 SIRIUS solid-state overload relay","metaDescription":"Siemens 3RB2056-2FC2 SIRIUS solid-state overload relay, 200 A rated current, Class 20E, S6 size. Current lifecycle status active. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"tripped\"","Depth":"155 mm","Solid":"1x (0.5 ... 4 mm²), 2x (0.5 ... 2.5 mm²)","Width":"120 mm","title":"3RB2056-2FC2","Height":"119 mm","at 24 V":"2 A","at 60 V":"0.55 A","at 110 V":"0.3 A","at 120 V":"4 A","at 125 V":"0.3 A","at 220 V":"0.11 A","at 230 V":"3 A","Trip Class":"CLASS 20E","Rated Value":"1 000 V","description":"Overload relay 50...200 A for motor protection Size S6, Class 20E Contactor mounting/stand-alone installation Main circuit: busbar connection Auxiliary circuit: Screw terminal Manual-Automatic-Reset","During Storage":"-40 ... +80 °C","Thermal Current":"200 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"Contactor mounting/stand-alone installation","Shock Resistance":"15g / 11 ms","For Main Contacts":"M8","Mounting Position":"any","Solid Or Stranded":"1x (0,5 ... 4 mm²), 2x (0,5 ... 2,5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"solid-state overload relay","Vibration Resistance":"1-6 Hz, 15 mm; 6-500 Hz, 20 m/s²; 10 cycles","at 480 V rated value":"200 A","at 600 V rated value":"200 A","Size Of Overload Relay":"S6","For Main Current Circuit":"busbar connection","Temperature Compensation":"-25 ... +60 °C","according to IEC 60068-2-27":"15g / 11 ms","at AC-3e rated value maximum":"1 000 V","Substance Prohibitance (Date)":"07/01/2006","Design Of The Auxiliary Switch":"integrated","Design Of The Overload Release":"electronic","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"200 A","for AC motors at 500 V at 50 Hz":"30 ... 132 kW","for AC motors at 690 V at 50 Hz":"55 ... 160 kW","For Auxiliary And Control Circuit":"screw-type terminals","Between Main And Auxiliary Circuit":"690 V","Relative Humidity During Operation":"10 ... 95 %","With Type Of Assignment 2 Required":"gG: 315 A","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"8 kV","With Type Of Coordination 1 Required":"gG: 355 A, Class L: 601 A","at AWG cables for auxiliary contacts":"2x (20 ... 14)","for 3-phase motors at 400 V at 50 Hz":"30 ... 90 kW","Of The Auxiliary And Control Contacts":"M3","Between Auxiliary And Auxiliary Circuit":"300 V","due to burst according to IEC 61000-4-4":"2 kV (power ports), 1 kV (signal ports) corresponds to degree of severity 3","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","For Main Contacts With Screw-Type Terminals":"10 ... 12 N·m","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","operational current at AC-3e at 400 V rated value":"200 A","Size Of Contactor Can Be Combined Company-Specific":"S6","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","Type Of Voltage Supply Via Input/Output Link Master":"No","contact rating of auxiliary contacts according to UL":"B600 / R300","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gG: 6 A","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"50 ... 200 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4bfb0b03f1b69bb64b38cd56263371af.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=11012&mlfb=3RB2056-2FC2"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2056-2FC2","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RB2056-2FC2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}