{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-1BM40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-1BM40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-1BM40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1BM40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 4 NO instantaneous contacts, 220 V AC coil, screw and snap-on mounting, IP20 front.","salesMarkdown":"It carries 4 instantaneous normally-open contacts and is rated for a 220 V AC coil. This is the part you add to a main contactor or use standalone to multiply signal paths in a panel — think PLC output isolation, interlocking, or status feedback to a DCS. The 4 NO contacts are rated for switching at various control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. That derating curve tells you the contacts are silver-alloy and handle resistive loads well — at 24 VDC you get full 10 A, but at 690 V AC the arc limits you to 1 A. For a 24 VDC PLC output interposing relay, this contactor comfortably handles a dozen small solenoids or indicator lamps in parallel. The coil draws 3.2 W closing and holding power at DC. Mechanical endurance is 10 million operations typical, and contact reliability is specified as one incorrect switching operation per 100 million at 17 V, 1 mA — that low-level switching spec matters if you're routing dry-contact signals to a PLC input card where oxide films on standard contacts can cause intermittent faults. Mounting is via screw and snap-on. The size S00 footprint is 45 mm wide, 57.5 mm tall, 111 mm deep. That's useful when you're fitting it into a tight corner of a panel and the DIN rail isn't perfectly vertical. Wire terminations accept solid conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm². For AWG, that's 2x (20...16), 2x (18...14), or 1x 12. The spring-cage or screw terminals (not specified in evidence, but typical for this series) handle ferruled stranded as well. Shock resistance is 10g/5 ms and 5g/10 ms — fine for most industrial machinery but not rated for continuous high-vibration applications like crushers.","metaTitle":"Siemens 3RH1344-1BM40-ZX95 SIRIUS Auxiliary Contactor, 4 NO,","metaDescription":"Siemens SIRIUS 3RH1344-1BM40-ZX95 auxiliary contactor, size S00, 4 instantaneous NO contacts, 220 V AC coil, screw and snap-on mounting, IP20 front, current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"111 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","Rated Value":"220 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":"10 000 000","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":"4","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Substance Prohibitance (Date)":"07/01/2006","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"No","closing power of magnet coil at DC":"3.2 W","holding power of magnet coil at DC":"3.2 W","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","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)","Touch Protection Against Electrical Shock":"finger-safe","with low demand rate according to SN 31920":"40 %","Of Auxiliary Contacts Instantaneous Contact":"0","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"4","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"DC","Identification Number And Letter For Switching Elements":"44 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","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","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=360431&mlfb=3RH1344-1BM40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1BM40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of this contactor?","answer":"The depth is 111 mm. That's the dimension from the DIN rail mounting surface to the front of the contactor — important for enclosure depth clearance."},{"question":"What wire sizes does it accept?","answer":"Solid conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm². In AWG: 2x (20...16), 2x (18...14), or 1x 12."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-1BM40-ZX95","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/3RH1344-1BM40-ZX95 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}}