{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2056-1FX2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2056-1FX2","canonicalUrl":"https://aoctrl.com/siemens/3RB2056-1FX2","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2056-1FX2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, solid-state overload relay, 3RB2056-1FX2, 200 A rated operational current, Trip Class 10E, Size S6.","salesMarkdown":"The 3RB2056-1FX2: Rated for 1,000 V AC-3e maximum and 50/60 Hz, it uses straight-through current transformers on the main circuit so there's no power loss across the sensing element — just a signal to the trip logic. The integrated auxiliary switch carries a note for message 'tripped', meaning the relay outputs a dedicated signal when it operates, not just a generic fault. This is useful for a PLC or HMI to log exactly which motor tripped on overload, rather than wiring a common alarm. Mounts directly onto a contactor or as a standalone unit — any position works, which simplifies panel layout. The S6 footprint is 120 mm wide by 119 mm tall by 155 mm deep, so it needs a solid chunk of DIN rail or backplate real estate. Storage and transport handle -40 to +80 °C. Vibration resistance is 1-6 Hz at 15 mm amplitude and 6-500 Hz at 20 m/s² for 10 cycles; shock tested to 15g for 11 ms per IEC 60068-2-27. It'll survive the ride out to the job site and the shake of a contactor closing next to it. Wiring terminals accept 2x (0.25 to 1.5 mm²) solid or stranded — spring-cage or screw, depending on the variant. Strip length and ferrule sizing follow standard panel practice. The integrated auxiliary switch has a range of voltage and current 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. These cover both DC control circuits and AC pilot duty — pick the column that matches your control voltage. ## Motor power ranges For AC motors at 500 V / 50 Hz, it covers 30 to 132 kW; at 690 V / 50 Hz, 55 to 160 kW. That's a wide band, so it fits a range of motor frame sizes without swapping the overload relay for a different model.","metaTitle":"Siemens 3RB2056-1FX2 SIRIUS solid-state overload relay, 200","metaDescription":"Siemens SIRIUS 3RB2056-1FX2 solid-state overload relay, 200 A rated operational current, Trip Class 10E, S6 size. Current production. Quoted 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":"2x (0.25 ... 1.5 mm²)","Width":"120 mm","title":"3RB2056-1FX2","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 10E","Rated Value":"1 000 V","description":"Overload relay 50...200 A for motor protection Size S6, Class 10E Contactor mounting/stand-alone installation Main circuit: straight-through transformer 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","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":"straight-through transformers","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)","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":"$130.81","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cdcc913216d99bb516cfbd5718e333cf.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=4195&mlfb=3RB2056-1FX2"},"ai":{"faq":[{"question":"What does the 'tripped' message note mean on this relay?","answer":"The integrated auxiliary switch is configured to output a dedicated 'tripped' signal when the overload relay operates, rather than a generic fault indication. This lets a controller log exactly which motor tripped."},{"question":"Will 3RB2056-1FX2 drop into a panel specified around 3RT5045-1AF00?","answer":"The 3RB2056-1FX2 is a size S6 solid-state overload relay; the 3RT5045-1AF00 is a contactor. They are designed to mount together in the SIRIUS system, so the overload relay can be installed directly onto the contactor or adjacent on the DIN rail without rewiring the main power circuit."},{"question":"What compliance documentation does this brand provide for 3RB2056-1FX2?","answer":"The part carries a RoHS substance prohibition date of July 1, 2006. The SIRIUS family is typically certified to UL, CSA, CE, and other international standards. Specific approval markings and declarations should be verified from the nameplate or manufacturer documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2056-1FX2","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/3RB2056-1FX2 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}}