{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2113-4ND0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2113-4ND0","canonicalUrl":"https://aoctrl.com/siemens/3RB2113-4ND0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2113-4ND0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3-pole, adjustable trip classes 5E/10E/20E/30E, screw-type main terminals, spring-loaded auxiliary terminals, ATEX Ex II (2) GD approved, 45 x 64 x 73 mm.","salesMarkdown":"The Siemens 3RB2113-4ND0 is a SIRIUS-brand solid-state overload relay for three-phase motor circuits. Unlike a bimetallic thermal overload, this uses a solid-state sensing circuit with adjustable trip classes — selectable between CLASS 5E, 10E, 20E, and 30E — so you match the trip curve to the motor start profile: fast for submersible pumps or compressors that accelerate quickly (5E), slower for high-inertia loads like fans or centrifuges (30E). It carries ATEX approval PTB 06 ATEX 3001 Ex II (2) GD, meaning it can be installed in the non-hazardous part of a circuit that controls equipment in a Zone 1 or Zone 2 gas or dust atmosphere — the relay itself sits in the safe area but protects motors in the classified zone. That's the main differentiator from a standard thermal overload; the solid-state design also eliminates the mechanical fatigue of bimetal heaters over repeated starts. The relay mounts directly to a contactor (Fastening Method: Contactor mounting) and occupies a 45 mm wide footprint. Depth is 73 mm, height 64 mm. Mounting position is any. Main circuit terminals are screw-type (2x 0.25…1.5 mm² solid or 2x 18…14 AWG); auxiliary and control circuit terminals are spring-loaded (2x 0.25…1.5 mm² or 2x 24…16 AWG). The spring-loaded aux terminals are a time-saver on the wiring bench — no screwdriver torque check needed, and they hold under vibration better than screw clamps in a panel next to a contactor. Auxiliary contact ratings are given across multiple control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and lower values at 60 V, 110 V, 125 V, and 220 V. The 4 A at 120 V figure is the highest thermal current — useful for driving a PLC input or a small contactor coil directly without an interposing relay. Surge voltage resistance is rated at 6 kV, and conducted burst immunity per IEC 61000-4-4 is 2 kV on power ports and 1 kV on signal ports (severity level 3). That means the relay can be wired into a panel with contactors and drives without external surge suppression for most industrial environments. Shock resistance is 15g / 11 ms; operating temperature range is -25 to +60 °C, storage/transport -40 to +80 °C, and relative humidity during operation up to 100 %. The 100 % RH spec means it handles condensing environments — unheated pump houses, washdown zones — without derating. Mounting: clips onto the contactor — no DIN rail required, no extra bracket. The 0 mm spacing upwards/forwards/backwards/downwards means it sits flush against the contactor face; side clearance of 6 mm is needed for auxiliary wiring access. Wiring: main circuit screw terminals accept 2x 0.25…1.5 mm² or 2x 18…14 AWG; auxiliary spring terminals accept 2x 0.25…1.5 mm² or 2x 24…16 AWG. Finely stranded wire with ferrule is preferred for the spring terminals — strip length is standard 8-10 mm. No special tools beyond a screwdriver and a ferrule crimper. Power dissipation per pole is 0.02 W — negligible for thermal panel design. The relay's own heat generation won't affect adjacent components even in a densely packed enclosure.","metaTitle":"Siemens 3RB2113-4ND0 SIRIUS Solid-State Overload Relay, 3-po","metaDescription":"Siemens 3RB2113-4ND0 SIRIUS solid-state overload relay. 3-pole, adjustable trip class 5E/10E/20E/30E. ATEX Ex II (2) GD approved. Sourced to order against RFQ. Available through in","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 1.5 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)":"07/01/2006","at AWG cables for main contacts":"2x (18 ... 14)","For Auxiliary And Control Circuit":"spring-loaded terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (24 ... 16)","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","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Size Of Contactor Can Be Combined Company-Specific":"S00","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","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":"0.32 ... 1.25 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=86474&mlfb=3RB2113-4ND0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2113-4ND0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does the 3RB2113-4ND0 carry?","answer":"RoHS compliance (substance prohibitance date 07/01/2006) and ATEX certification PTB 06 ATEX 3001 Ex II (2) GD for use in circuits controlling equipment in hazardous gas/dust zones. The ATEX certificate is available on request."},{"question":"Will 3RB2113-4ND0 drop into a panel spec'd around 3RT1016-1AR11?","answer":"Yes — the 3RB2113-4ND0 is designed to mount directly onto a 3RT1016 contactor (the 'contactor mounting' fastening method). It clips onto the front of the contactor without additional hardware. The 45 mm width and 73 mm depth match the 3RT1016 frame. No rewiring of the main circuit is needed if replacing an existing overload; the screw-type main terminals accept the same wire sizes (2x 0.25…1.5 mm² or 2x 18…14 AWG)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2113-4ND0","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/3RB2113-4ND0 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}}