{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2056-1FW2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2056-1FW2","canonicalUrl":"https://aoctrl.com/siemens/3RB2056-1FW2","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2056-1FW2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2056-1FW2, Size S6, rated operational current 200 A, Trip Class 10E, for AC motor protection.","salesMarkdown":"The Siemens 3RB2056-1FW2 is a SIRIUS solid-state overload relay, Size S6, rated for 200 A continuous in the main circuit. Electronic overload release gives better repeatability and temperature stability than a bimetal; it compensates for ambient temperature shifts from -25 to +60 °C. This is the part you want when the line can't tolerate the drift of a thermal bimetallic relay. Motor power coverage: 30 to 132 kW at 500 V, 55 to 160 kW at 690 V. That's a wide band — one relay covers a range of frame sizes, reducing the spare-part count on the shelf. Mounts directly onto a contactor or standalone on the panel plate. The fastening method and the 120 mm width mean it lines up with the SIRIUS S6 contactor footprint — no extra bracketry, no re-drilling the backplate. ## Ratings that decide fit — the so-what on each 200 A thermal current and 200 A operational current at 480 V and 600 V. That's the continuous current the straight-through transformers can carry without saturating. If your motor FLA is under 200 A, this relay is sized correctly — no current transformer external to the relay needed. Auxiliary contact ratings cover the common control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V. These are the dry-contact signals that feed the PLC input or the contactor hold coil. Verify the minimum load of your input card — solid-state outputs sometimes need a wetting current the relay's contacts can provide. Rated insulation voltage 1 000 V. That's the withstand voltage between live parts and ground — fine for 690 V AC systems with a safety margin. No special phase-barrier needed inside the panel. Vibration resistance: 1–6 Hz at 15 mm amplitude, 6–500 Hz at 20 m/s², 10 cycles. Shock resistance 15g / 11 ms. Mount it in any position. If the panel is on a conveyor line or near a press, this relay will hold its trip settings. Size S6 means this relay occupies the same DIN-rail or screw-mount footprint as the SIRIUS S6 contactor family. 120 mm wide, 119 mm tall, 155 mm deep. Check the enclosure depth — 155 mm plus wiring clearance needs about 180 mm back-to-front. Terminals accept 1x (0.5 to 4 mm²) or 2x (0.5 to 2.5 mm²) solid or stranded. Use ferrules on stranded for a reliable connection. The spring-cage or screw type isn't specified here, but the cross-section range is typical for a control-circuit terminal block. Operating temperature -25 to +60 °C; storage/transport -40 to +80 °C. If the panel sits in a non-climate-controlled warehouse, the relay will survive the trip — but calibrate at the operating temperature for accurate trip timing. ## The 'tripped' message — what it means on the line Listed note: 'for message tripped'. This relay has an integrated auxiliary switch that changes state when the overload trips — that contact feeds the 'tripped' signal back to the PLC or indicator lamp. No separate auxiliary block needed; the signal is built in.","metaTitle":"Siemens 3RB2056-1FW2 SIRIUS Solid-State Overload Relay, 200","metaDescription":"Siemens 3RB2056-1FW2 SIRIUS solid-state overload relay, 200 A rated operational current, Trip Class 10E, Size S6. For AC motor protection up to 160 kW at 690 V. Current production.","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":"3RB2056-1FW2","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: 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","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":"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":"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","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/99a15f85ea9518a4f754bfc8302824a6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=106922&mlfb=3RB2056-1FW2"},"ai":{"faq":[{"question":"Will 3RB2056-1FW2 fit a panel designed for a 3RT5056-6AB36 contactor?","answer":"Yes, same SIRIUS S6 footprint. The 3RB2056-1FW2 mounts directly onto the 3RT5056 contactor or standalone. Width 120 mm matches the S6 contactor width — no panel rework."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2056-1FW2","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/3RB2056-1FW2 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}}