{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2113-4SB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2113-4SB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2113-4SB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2113-4SB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3-pole, contactor mounting, adjustable trip class 5E/10E/20E/30E, screw-type terminals, ATEX Ex II (2) GD, 3RB2113-4SB0.","salesMarkdown":"The Siemens SIRIUS 3RB2113-4SB0 is a solid-state overload relay for three-phase motor protection, mounting directly onto a contactor. Its adjustable trip class — selectable between CLASS 5E, 10E, 20E, and 30E — lets you match the thermal curve to the motor start profile: 5E for fast-starting servo or spindle drives, 30E for high-inertia loads like centrifuges or large fans. The relay carries ATEX Ex II (2) GD certification, so it's cleared for use in potentially explosive atmospheres when paired with an appropriate motor and upstream protection. Fastening method is contactor mounting — the relay clips directly onto the contactor's front face, saving DIN-rail space and keeping the power loop short. No upwards, forwards, backwards, or downwards clearance is required around the relay body; only 6 mm at the side is needed for airflow and wiring access. The 45 mm width and 64 mm height match the standard SIRIUS contactor footprint, so it fits existing panel layouts without re-drilling. Screw-type terminals on both the main current circuit and the auxiliary/control circuit accept solid conductors from 0.5 to 4 mm² (2x 0.5 to 2.5 mm²) or AWG 18-14 for the mains, and 2x AWG 20-14 for the auxiliaries. ## Electrical ratings and environment The auxiliary contact set is rated for switching at several common control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and derated figures for 60 V (0.55 A), 110 V (0.3 A), 125 V (0.3 A), and 220 V (0.11 A). The relay operates across -25 to +60 °C and can be stored or transported from -40 to +80 °C. It withstands 100 % relative humidity during operation and shock loads of 15g for 11 ms. EMC immunity includes burst transients at 2 kV on power ports and 1 kV on signal ports, severity level 3 per IEC 61000-4-4, plus a surge voltage withstand of 6 kV.","metaTitle":"Siemens 3RB2113-4SB0 SIRIUS Solid-State Overload Relay, 3-Po","metaDescription":"Siemens SIRIUS 3RB2113-4SB0 solid-state overload relay. 3-pole, contactor mounting, adjustable trip class 5E-30E. ATEX Ex II (2) GD. Current production. Sourced to order against RF","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"73 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"45 mm","Height":"64 mm","Upwards":"0 mm","at 24 V":"2 A","at 60 V":"0.55 A","Forwards":"0 mm","Per Pole":"0.02 W","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","Backwards":"0 mm","Downwards":"0 mm","Trip Class":"CLASS 5E, 10E, 20E and 30E adjustable","At The Side":"6 mm","During Storage":"-40 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"Contactor mounting","Shock Resistance":"15g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Type Of Protection":"PTB 06 ATEX 3001 Ex II (2) GD","Product Designation":"solid-state overload relay","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"01.07.2006 00:00:00","at AWG cables for main contacts":"2x (18 ... 14)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","due to burst acc. to IEC 61000-4-4":"2 kV (power ports), 1 kV (signal ports) corresponds to degree of severity 3","reference code acc. to IEC 81346-2":"F","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 14)","Finely Stranded With Core End Processing":"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","electrostatic discharge acc. to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","operating voltage at AC-3 rated value maximum":"690 V","field-based interference acc. to IEC 61000-4-3":"10 V/m","Size Of Contactor Can Be Combined Company-Specific":"S00","due to conductor-earth surge acc. to IEC 61000-4-5":"2 kV (line to earth) corresponds to degree of severity 3","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","power loss [W] for rated value of the current at AC in hot operating state":"0.05 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"3 ... 12 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=48747&mlfb=3RB2113-4SB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2113-4SB0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RB2113-4SB0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the closest functional alternative to 3RB2113-4SB0?","answer":"The 3RU2116-1FC1 is a bimetallic overload relay in the same SIRIUS family, but it uses a thermal (bimetal) operating principle rather than solid-state. The 3RB2113-4SB0 offers adjustable trip class (5E-30E) and ATEX certification; the 3RU2116-1FC1 does not carry ATEX and has fixed trip classes. Mounting footprint and terminal layout differ — verify panel fit before substituting."},{"question":"What compliance documentation does 3RB2113-4SB0 carry?","answer":"ATEX certification per PTB 06 ATEX 3001 for Ex II (2) GD, RoHS substance prohibitance effective July 1, 2006, and EMC immunity per IEC 61000-4-4 (burst) at severity level 3. The reference code per IEC 81346-2 is F."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2113-4SB0","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/3RB2113-4SB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}