{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2131-1KG40-0LA4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2131-1KG40-0LA4","canonicalUrl":"https://aoctrl.com/siemens/3RH2131-1KG40-0LA4","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2131-1KG40-0LA4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2131-1KG40-0LA4 auxiliary contactor, size S00, 3 NO instantaneous contacts, screw and snap-on 35 mm DIN rail mounting, 45 mm width, 117 mm depth.","salesMarkdown":"## SIRIUS S00 auxiliary contactor — 3 NO, 45 mm wide The 3RH2131-1KG40-0LA4: It is designed for switching control circuits, signal interlocking, and extending the contact set of a main contactor in a motor starter or control relay circuit. These are the maximum continuous switching currents per contact; the actual load current must stay within these limits for the applied voltage to avoid contact welding or excessive arcing. The built-in suppressor diode across the coil (closing power 13 W at DC) reduces voltage spikes on the control circuit, protecting the PLC output or relay driving it. ## Panel integration and environmental limits These are the minimum air gaps to adjacent components or enclosure walls for heat dissipation and arc flash containment. The mechanical endurance is 30 million switching cycles typical — this is the life expectancy of the contactor mechanism before wear, not the electrical endurance which depends on the switched load.","metaTitle":"Siemens 3RH2131-1KG40-0LA4 SIRIUS auxiliary contactor, S00","metaDescription":"Siemens SIRIUS 3RH2131-1KG40-0LA4 auxiliary contactor, size S00, 3 NO contacts, 45 mm width, 117 mm depth. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"117 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 20 ms","title":"3RH2131-1KG40-0LA4","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"125 V","description":"Contactor relay railway, 2 NO + 1 NC 125 V DC, 0.7... 1.25* US, with integrated suppressor diode, Size S00, screw terminal installation on standard mounting rail optimized (20G), suitable for PLC outputs","Initial Value":"0.7","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","Full-Scale Value":"1.25","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S00","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 440 V rated value":"0.5 A","at 500 V rated value":"2 A","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"3","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"suppressor diode","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"13 W","holding power of magnet coil at DC":"4 W","Surge Voltage Resistance Rated Value":"6 kV","operating frequency at DC-12 maximum":"1 000 1/h","operating frequency at DC-13 maximum":"1 000 1/h","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","number of NO contacts for auxiliary contacts":"3","Type Of Voltage Of The Control Supply Voltage":"DC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Identification Number And Letter For Switching Elements":"31 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V":"C characteristic: 6 A; 0.4 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e261140c5fae62a8808aa4030f0a5790.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=202013&mlfb=3RH2131-1KG40-0LA4"},"ai":{"faq":[{"question":"What is the width and depth of the 3RH2131-1KG40-0LA4?","answer":"The width is 45 mm and the depth is 117 mm. The height is 57.5 mm."},{"question":"What compliance documentation does this auxiliary contactor carry?","answer":"The part meets RoHS compliance with a substance prohibitance date of 10/01/2009. The degree of pollution is 3 per IEC 60947-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2131-1KG40-0LA4","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/3RH2131-1KG40-0LA4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}