{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1UB40-0KV0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1UB40-0KV0","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1UB40-0KV0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1UB40-0KV0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 24 VDC coil, 2 NO instantaneous contacts, size S00, 45 mm width, IP20 front.","salesMarkdown":"It carries 2 instantaneous normally-open contacts, each rated 10 A in AC-12 duty at 24 V. That AC-12 rating means the contacts are specified for resistive loads at control-circuit voltages — the typical use is switching PLC outputs, pilot lights, or solenoid valves inside a cabinet, not motor starting. The built-in varistor surge suppressor clips the inductive kickback from the coil when de-energized — no external flyback diode needed across the DC coil terminals. That saves a wiring step and keeps the panel layout cleaner. ## Mounting and integration into a panel Mounts by screw or snap-on onto a DIN rail. The size S00 footprint is 45 mm wide, 57.5 mm tall, 72 mm deep — it occupies a single 45 mm slot on the rail, leaving room for adjacent contactors or terminal blocks. That helps when fitting into a tight gland-plate area or a swing-frame panel. Wire terminals accept solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm². The contactor ships with the varistor integrated and the screw terminals ready for the wire sizes listed above.","metaTitle":"Siemens 3RH1122-1UB40-0KV0 SIRIUS Auxiliary Contactor","metaDescription":"Siemens 3RH1122-1UB40-0KV0 SIRIUS auxiliary contactor, 24 VDC coil, 2 instantaneous NO contacts, 10 A AC-12, size S00, IP20 front. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","Maximum":"2 000 m","At The Side":"0 mm","Rated Value":"24 V","Initial Value":"0.8","Mounting type":"screw and snap-on mounting","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Full-scale value":"1.1","Shock resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","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","Product Brand Name":"SIRIUS","Degree of pollution":"3","Product designation":"Auxiliary contactor","at 24 V rated value":"10 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.27 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"2 A","at 690 V rated value":"1 A","Instantaneous Contact":"2","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Design of the surge suppressor":"with varistor","protection class IP on the front":"IP20","Closing power of magnet coil at DC":"3.2 W","Holding power of magnet coil at DC":"3.2 W","Operating current at AC-12 maximum":"10 A","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 81346-2":"K","with low demand rate acc. to SN 31920":"40 %","with high demand rate acc. to SN 31920":"75 %","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Of Auxiliary Contacts Instantaneous Contact":"0","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","Identification number and letter for switching elements":"22 E","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Insulation voltage with degree of pollution 3 at AC rated value":"690 V","Type of electrical connection for auxiliary and control current circuit":"screw-type terminals","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$34.79","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=364386&mlfb=3RH1122-1UB40-0KV0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1UB40-0KV0/alternatives.json"},"ai":{"faq":[{"question":"Is 3RH2122-1AC60 a valid cross-reference for 3RH1122-1UB40-0KV0?","answer":"The 3RH2122-1AC60 is a sibling in the same SIRIUS auxiliary contactor family, but it carries a different coil voltage and contact arrangement. Verify the coil voltage and contact count against your BOM before substituting — the 3RH1122-1UB40-0KV0 is the current-production part for a 24 VDC, 2 NO requirement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1UB40-0KV0","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/3RH1122-1UB40-0KV0 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}}