{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2056-2FX2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2056-2FX2","canonicalUrl":"https://aoctrl.com/siemens/3RB2056-2FX2","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2056-2FX2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2056-2FX2, 200 A rated operational current, CLASS 20E trip class, size S6, electronic design.","salesMarkdown":"The Siemens 3RB2056-2FX2 is a SIRIUS solid-state overload relay, size S6, rated for 200 A continuous thermal current (Ith) and 200 A operational current in AC-3e duty up to 1000 V. It's an electronic overload release with integrated auxiliary contacts — no external add-ons needed for the trip signal. The CLASS 20E trip curve means it'll ride through normal motor start inrush on conveyors, pumps, or fans without nuisance tripping, but still protect the winding from a sustained overload. Straight-through transformers handle the main current circuit, so you don't mess with looping cables through a donut. The 200 A rating at 480 V and 600 V matches it to motors in the 30–132 kW range at 500 V, or 55–160 kW at 690 V (50 Hz). That covers a lot of medium-voltage motor starters in industrial pump and fan service. The auxiliary contacts are rated for switching at various control voltages: 4 A at 120 V, 3 A at 230 V, 2 A at 24 V, and lower ratings at 60, 110, 125, and 220 V — so it'll handle most PLC or relay interface loads without a separate interposing relay. Temperature compensation is built in for -25 to +60 °C operation, and it'll survive storage or transport from -40 to +80 °C. Vibration resistance is spec'd to 1–6 Hz at 15 mm amplitude and 6–500 Hz at 20 m/s², with shock rated at 15g for 11 ms — it'll stay put on a live plant floor. Fastening method is contactor mounting or stand-alone installation — so it can bolt directly to a matching SIRIUS contactor (like the 3RT1055 or 3RT1056 frame) or sit on a DIN rail. Any mounting position is allowed. The control circuit terminals accept 2x (0.25 to 1.5 mm²) solid or stranded wire. Dimensions are 120 mm wide, 119 mm high, and 155 mm deep — that's a compact footprint for a 200 A device, but check your panel depth before committing. The note on the part says \"for message 'tripped'\" — that's the integrated auxiliary contact that closes on a trip event, giving you a dry-contact signal back to the PLC or annunciator.","metaTitle":"Siemens 3RB2056-2FX2 SIRIUS solid-state overload relay, 200","metaDescription":"Siemens 3RB2056-2FX2 SIRIUS solid-state overload relay, 200 A rated operational current, CLASS 20E trip class, size S6. Active production. Sourced to order. RoHS compliant.","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":"3RB2056-2FX2","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: 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":"$142.24","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a1a70042583363fd49ef65710e536bbd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=468990&mlfb=3RB2056-2FX2"},"ai":{"faq":[{"question":"What does the note 'for message tripped' mean?","answer":"It means the integrated auxiliary contact is wired to signal a 'tripped' state — typically a normally-open contact that closes when the overload relay trips, giving a dry-contact output to a PLC input or alarm."},{"question":"Will this drop into a panel designed for a 3RT1055-6LA06 contactor without rewiring?","answer":"The 3RB2056-2FX2 is designed to mount directly onto a SIRIUS contactor like the 3RT1055 or 3RT1056, so the mechanical fit is intentional. The power and control wiring will follow the contactor's terminals — no rewiring of the main circuit, but you'll need to run the auxiliary output for the trip signal separately."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2056-2FX2","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/3RB2056-2FX2 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}}