{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1422-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1422-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RH1422-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1422-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, auxiliary contactor, S00 frame, 4 NO contacts, 48 V DC coil, screw and snap-on mounting, IP20 front, 72 mm depth, 90 mm width, 57.5 mm height.","salesMarkdown":"## SIRIUS auxiliary contactor, 48 V DC, S00 frame The Siemens 3RH1422-1BW40 is a SIRIUS auxiliary contactor in the S00 frame size, carrying four normally-open instantaneous contacts and a 48 V DC coil. The S00 frame — 57.5 mm wide, 90 mm tall, 72 mm deep — fits the standard DIN-rail grid alongside S00 contactors and overload relays, so a panel laid out for a 3-pole S00 contactor accepts this auxiliary block without re-spacing the gland plate. Coil holding power is a steady 3.2 W DC, with closing power at the same figure — no inrush spike to budget for on the 48 V DC supply. Terminals accept solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm². The IP20 front protection means the terminals are finger-safe once wired; the enclosure interior is not sealed against washdown, so this is a panel-mount part, not a field-mount one. ## Switching capacity and environment Shock resistance is 10g / 5 ms and 5g / 10 ms, which covers the vibration profile of most industrial control panels. Switching capacity by voltage: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, 1 A at 690 V for the AC ratings, and 1 A at 110 V, 0.27 A at 220 V for DC. The 0.8 initial value and 1.1 full-scale value on the spec line reference the thermal current derating curve — the contactor carries its full rated current at 40 °C ambient and derates linearly above that.","metaTitle":"Siemens 3RH1422-1BW40 SIRIUS Auxiliary Contactor, 48 V DC, S","metaDescription":"Siemens SIRIUS 3RH1422-1BW40 auxiliary contactor, 48 V DC coil, S00 frame, 4 NO + 0 NC, IP20 front, screw/snap-on mount. Current production. Quoted to order.","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":"90 mm","Height":"57.5 mm","Rated Value":"48 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","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","Contact Reliability":"one incorrect switching operation of 100 million switching operations (17 V, 1 mA)","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","Of Contactor Typical":"5 000 000","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","Substance Prohibitance (Date)":"01.07.2006 00:00:00","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"3.2 W","holding power of magnet coil at DC":"3.2 W","reference code acc. to IEC 81346-2":"K","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","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)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Touch Protection Against Electrical Shock":"finger-safe","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","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","Identification Number And Letter For Switching Elements":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=430522&mlfb=3RH1422-1BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1422-1BW40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RH1422-1BW40?","answer":"The depth is 72 mm. Combined with the 90 mm width and 57.5 mm height, it occupies the standard S00 footprint on a DIN rail."},{"question":"What wire sizes does the 3RH1422-1BW40 accept?","answer":"Solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² per terminal."},{"question":"Will the 3RH1422-1BW40 drop into a panel specified for the 3RH2122-1BW40?","answer":"The 3RH2122-1BW40 is a larger S0 frame variant. The S00-frame 3RH1422-1BW40 is physically smaller (57.5 mm wide vs the S0's wider footprint) and uses the same DIN-rail clip, but the terminal layout and spacing differ. A panel cut for the S0 frame has extra space around the S00 part, but the inverse — replacing an S0 with an S00 — leaves a gap that may need a filler plate or re-drilling of the mounting holes if screw-fastened."},{"question":"Where can I buy the 3RH1422-1BW40?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1422-1BW40","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/3RH1422-1BW40 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}}