{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2056-2FF2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2056-2FF2","canonicalUrl":"https://aoctrl.com/siemens/3RB2056-2FF2","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2056-2FF2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, solid-state overload relay, 3RB2056-2FF2, CLASS 20E, 200 A rated operational current, S6 size, for AC motors 30-132 kW at 500 V.","salesMarkdown":"The Siemens 3RB2056-2FF2 is a SIRIUS solid-state overload relay — an electronic, not bimetallic, overload protection device for three-phase AC motors. It's sized for the S6 frame, which means it mates physically with S6 contactors in the SIRIUS family for a coordinated motor starter assembly, or can be mounted standalone. Rated operational current is 200 A with CLASS 20E trip class. Rated insulation voltage is 1,000 V, and the maximum operational current at both 480 V and 600 V is 200 A — so the 200 A rating holds across common industrial voltage levels without derating. The thermal current (Ith) is also 200 A, confirming the continuous current path is rated for that full value. For motor sizing: at 500 V / 50 Hz, this relay covers motors from 30 kW up to 132 kW. That's a wide power band for a single frame size, made possible by the electronic overload release (no heater elements to swap). ## Mounting, wiring, and environment — what fits where Mounts directly on a SIRIUS S6 contactor (e.g., 3RT5056) or as a standalone unit via the base. Fastening method is contactor mounting or stand-alone installation. Main circuit connection is via busbar connection (M8 bolts for the main contacts). Auxiliary/control wiring accepts 2× (0.25... 1.5 mm²) solid or stranded wire — typical for signal-level connections. The auxiliary switch is integrated, not an add-on module. Storage and transport range is -40 to +80 °C. Vibration resistance: 1-6 Hz at 15 mm amplitude, 6-500 Hz at 20 m/s², 10 cycles. Shock: 15g / 11 ms per IEC 60068-2-27. ## Auxiliary contact ratings — the control side The integrated auxiliary switch has these contact ratings: 2 A at 24 V, 0.55 A at 60 V, 0.3 A at 110 V, 4 A at 120 V, 0.3 A at 125 V, 0.11 A at 220 V, and 3 A at 230 V. The lower DC ratings (0.55 A at 60 V, 0.3 A at 125 V) reflect DC arc interruption limits. RoHS compliance date is noted as July 1, 2006 — compliant with the original RoHS directive. No conflict minerals or REACH SVHC flags are in the evidence; standard EU industrial compliance applies.","metaTitle":"Siemens 3RB2056-2FF2 SIRIUS Solid-State Overload Relay, CLAS","metaDescription":"Siemens 3RB2056-2FF2 SIRIUS solid-state overload relay, CLASS 20E, 200 A rated operational current, S6 size. Active production. Quoted to order. Request 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":"2x (0.25 ... 1.5 mm²)","Width":"120 mm","title":"3RB2056-2FF2","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: Spring-type 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":"2x (0,25 ... 1,5 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":"spring-loaded 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 (24 ... 16)","for 3-phase motors at 400 V at 50 Hz":"30 ... 90 kW","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":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Finely Stranded Without Core End Processing":"2x (0.25 ... 1.5 mm²)","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","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":"$147.32","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/44fb676e70d262d4b8020aec01ec47e1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=70544&mlfb=3RB2056-2FF2"},"ai":{"faq":[{"question":"What is the note for message 'tripped' on this component?","answer":"The listed note is 'for message \"tripped\"' — this indicates the auxiliary contact configuration is designed to signal a tripped condition to a PLC or indicator, rather than a standard normally-open/normally-closed auxiliary."},{"question":"Will 3RB2056-2FF2 drop into a panel specified around 3RT5045-1AF00?","answer":"No — 3RT5045-1AF00 is a SIRIUS S0 contactor, while the 3RB2056-2FF2 is an S6 frame overload relay. They are different mechanical sizes and cannot be directly mated. The 3RB2056-2FF2 mates with S6 contactors like 3RT5056."},{"question":"What compliance documentation does Siemens provide for 3RB2056-2FF2?","answer":"RoHS compliance is documented with a substance prohibition date of July 1, 2006. Standard Siemens declarations for CE, UL, and CSA are available on request for this active catalog item."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2056-2FF2","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/3RB2056-2FF2 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}}