{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2422-1LB40-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2422-1LB40-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RH2422-1LB40-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2422-1LB40-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, Size S00, 24 VDC coil, 2 NO + 2 NC contacts, screw and snap-on 35 mm DIN rail mounting, 117 mm depth, 90 mm width.","salesMarkdown":"The coil pulls in at 24 VDC with a closing power of 13 W, and the contact block carries 10 A at 24 V rated value — enough for PLC inputs, relay coils, and indicator lamps in a control panel. A built-in varistor surge suppressor handles the inductive kick from the coil, so you don't need an external flyback diode across the DC coil terminals. The 10 A rating at 24 V is the headline contact current, but the same contacts also handle 4.7 A at 60 V, 3 A at 110 V, and 1.2 A at 220 V — useful when the auxiliary contactor switches loads at different control voltages in the same cabinet. Mechanical endurance is listed at 5 million operating cycles typical, with a maximum switching frequency of 10,000 operations per hour at AC — that's about one cycle every 360 ms, so it keeps up with fast-cycling machines. Arcing time runs 10 to 15 ms, and the minimum clearance around the contactor is 10 mm upwards, forwards, and downwards, 6 mm at the side — tight enough for dense DIN-rail layouts but leave the vertical gap for arc venting. Size S00 means the contactor body is 57.5 mm tall, 90 mm wide, and 117 mm deep — a compact footprint that fits alongside S00 contactors and overload relays on the same DIN rail without overhang. The mounting position is flexible: +/-180° rotation on a vertical surface, plus +/-22.5° tilt forward or backward — useful when the panel layout forces an odd angle. Terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid or stranded wire — standard control wiring sizes, no special ferrules needed.","metaTitle":"Siemens 3RH2422-1LB40-0LA0 SIRIUS Auxiliary Contactor, 24 VD","metaDescription":"Siemens SIRIUS 3RH2422-1LB40-0LA0 auxiliary contactor, 24 VDC coil, 10 A rated, Size S00. Current production. Screw and snap-on 35 mm DIN rail. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"117 mm","Width":"90 mm","at AC":"10 000 1/h","at DC":"7 ... 20 ms","title":"3RH2422-1LB40-0LA0","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":"24 V","description":"Contactor relay latched railway, 2 NO + 1 NC, 24 V DC, 0.7... 1.25* US, with varistor integrated, Size S00, screw terminal","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":"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","Design Of The Surge Suppressor":"with varistor","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 NC contacts for auxiliary contacts":"1","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":"21","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/ca70a139063b79980df80e37f13e8b3c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=244349&mlfb=3RH2422-1LB40-0LA0"},"ai":{"faq":[{"question":"Where can I buy 3RH2422-1LB40-0LA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for 3RH2422-1LB40-0LA0?","answer":"The 3RH2422-1AB00 is a peer auxiliary contactor in the same SIRIUS Size S00 family, but it uses a 24 VAC/DC coil without a varistor — verify coil type and surge suppression before substituting."},{"question":"Will 3RH2422-1LB40-0LA0 drop into a panel specified around 3RH2422-1AB00?","answer":"Yes, both are Size S00 with the same screw and snap-on 35 mm DIN rail mounting, same 57.5 x 90 x 117 mm footprint, and same terminal wiring range. The main difference is the coil: the -1LB40-0LA0 has a 24 VDC coil with a built-in varistor, while the -1AB00 uses a 24 VAC/DC coil without one."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2422-1LB40-0LA0","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/3RH2422-1LB40-0LA0 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}}