{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2131-1AM20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2131-1AM20","canonicalUrl":"https://aoctrl.com/siemens/3RH2131-1AM20","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2131-1AM20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3 NO instantaneous contacts, 208 VAC 50/60 Hz coil, screw and snap-on 35 mm DIN rail mounting, 45 mm width.","salesMarkdown":"It carries three normally-open instantaneous contacts, each rated 10 A at both 24 V and 230 V, so it handles typical 24 VDC PLC inputs and 230 VAC pilot-duty loads without derating. The coil is wound for 208 V at 50 Hz and 60 Hz, with an operating range of 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz — meaning it picks up reliably even if the control transformer sags to about 166 V. The contactor is physically sized as S00 — the smallest SIRIUS frame — at 45 mm wide, 57.5 mm tall, and 73 mm deep. The electrical endurance depends on the switched load: at 24 V it handles 10 A, at 110 V it drops to 3 A, and at 230 V it is still 10 A — note that the 230 V rating matches the 24 V rating, which is unusual and means the contacts are generously sized for AC resistive loads at that voltage. Wire termination accepts two conductors per clamp: 2x 0.5 to 1.5 mm² solid or stranded, 2x 0.75 to 2.5 mm², or a single 4 mm².","metaTitle":"Siemens SIRIUS 3RH2131-1AM20 Auxiliary Contactor, 3 NO Conta","metaDescription":"Siemens SIRIUS 3RH2131-1AM20 auxiliary contactor, size S00, 3 NO contacts, 208 VAC 50/60 Hz coil. Rated 10 A at 24 V and 230 V. Screw and snap-on 35 mm DIN rail. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"4 ... 15 ms","at DC":"10 000 1/h","title":"3RH2131-1AM20","Height":"57.5 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","description":"Contactor relay, 3 NO + 1 NC, 208 V AC, 50 / 60 Hz, Size S00, screw terminal","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","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 50 Hz rated value":"208 V","at 500 V rated value":"2 A","at 60 Hz rated value":"208 V","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","Product Extension Auxiliary Switch":"Yes","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 %","apparent holding power of magnet coil at AC":"5.7 VA","apparent pick-up power of magnet coil at AC":"37 VA","with high demand rate according to SN 31920":"73 %","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"3","Type Of Voltage Of The Control Supply Voltage":"AC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.8","Identification Number And Letter For Switching Elements":"31 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.25","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/5b393f905d4506622b86815bfc2b8e25.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=627794&mlfb=3RH2131-1AM20"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RH2131-1AM20?","answer":"The 3RT1016-1AN22 is a power contactor from the same SIRIUS S00 family, but it is a different device — a main contactor with a coil for a different voltage. The 3RH2131-1AM20 is specifically an auxiliary contactor with 3 NO contacts and a 208 VAC coil. If you need a direct functional replacement within the same family, the 3RH2131-1AM20 is the current active part; there is no identical second-source from another brand that drops in without rewiring."},{"question":"What are the key dimensions of 3RH2131-1AM20?","answer":"Width is 45 mm, height is 57.5 mm, depth is 73 mm. It is the S00 frame size."},{"question":"What compliance documentation is available for 3RH2131-1AM20?","answer":"The part carries RoHS and REACH compliance, with a substance prohibitance date of October 2009. It is rated for pollution degree 3 per IEC 60947-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2131-1AM20","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/3RH2131-1AM20 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}}