{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2422-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2422-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RH2422-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2422-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH2422-1BW40, 2 instantaneous NO contacts, 24 VDC coil, 10 A rated, screw and snap-on 35 mm rail mounting.","salesMarkdown":"The Siemens 3RH2422-1BW40 is a SIRIUS auxiliary contactor in size S00, fitted with two instantaneous normally-open contacts and a 24 VDC coil. Its job is to switch control signals — pilot lights, PLC inputs, contactor coils, or small solenoid valves — in a panel where the main contactor or motor starter has already handled the power circuit. The 4 W closing and holding power means the coil draw is modest; a standard 24 VDC control transformer or a PLC digital output can drive it without a separate interposing relay, provided the output's minimum load current is below the coil's holding current. The 10 A rating at 24 V and at 230 V governs the resistive load curve — a 24 VDC pilot lamp bank or a 230 VAC contactor coil falls within that envelope. At 400 V the rating drops to 3 A, and at 690 V to 1 A, so if you are switching a 400 VAC control transformer primary, stay under 3 A. The 2 instantaneous contacts are not timed or delayed; they close and open with the armature travel, so they suit straightforward interlocking and status feedback, not sequenced logic that needs a timing relay. The S00 footprint is the smallest Siemens contactor frame; the 3RH2422-1BW40 measures 73 mm deep by 90 mm wide by 57.5 mm high. Mechanical endurance is rated at 5 000 000 operating cycles, which for an auxiliary contactor running at, say, 10 000 switching operations per hour translates to a service life measured in years before the contacts wear out, provided the load current stays within the rated curve.","metaTitle":"Siemens 3RH2422-1BW40 SIRIUS Auxiliary Contactor, 2 NO, 24 V","metaDescription":"Siemens SIRIUS 3RH2422-1BW40 auxiliary contactor, size S00, 2 instantaneous NO contacts, 24 VDC coil, 10 A rated. Current lifecycle, sourced to order. Depth 73 mm, width 90 mm.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"90 mm","at AC":"10 000 1/h","at DC":"7 ... 13 ms","title":"3RH2422-1BW40","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":"48 V","description":"Contactor relay, latched, 2 NO + 2 NC, 48 V DC Size S00, screw terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","Full-Scale Value":"1.1","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":"5 000 000","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":"2","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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","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 NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","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":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"5 000 000","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/8c4b5f0ff4d4becc292cb2f61e9ced44.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=884318&mlfb=3RH2422-1BW40"},"ai":{"faq":[{"question":"What is the depth of 3RH2422-1BW40?","answer":"The depth is 73 mm. Width is 90 mm, height is 57.5 mm."},{"question":"Will 3RH2422-1BW40 drop into a panel specified around 3RH2122-1BW40 without rewiring?","answer":"Both are S00-frame SIRIUS auxiliary contactors with the same 35 mm DIN-rail mounting and similar terminal ranges, so the mechanical fit and wiring footprint are identical. The functional difference is the contact configuration: the 3RH2422-1BW40 carries 2 instantaneous NO contacts, while the 3RH2122-1BW40 carries a different contact arrangement. Verify your control logic needs the 2 NO set before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2422-1BW40","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/3RH2422-1BW40 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}}