{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-1BB40-0AA1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-1BB40-0AA1","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-1BB40-0AA1","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1BB40-0AA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 4 NO instantaneous contacts, 24 V DC coil, screw and snap-on mounting, IP20 front, 45 mm width.","salesMarkdown":"The 4 NO (normally-open) instantaneous contacts switch load circuits up to 10 A at 24 V (AC-12), 6 A at 230 V, or 1 A at 690 V. Coil hold power is a constant 3.2 W DC, so the power supply budget is predictable — no inrush spike beyond the closing transient. Size S00 means it fits the standard 45 mm wide DIN-rail footprint — same envelope as the smallest SIRIUS contactors. Snap-on mounting and a ±180° rotation range on vertical surfaces give flexibility in a crowded enclosure. The AC-12 rating of 10 A is the resistive-load limit — use that for pilot duty or signal lamps. For inductive loads like contactor coils or small solenoids, derate to the AC-15 curve (not listed here, but standard practice). The 6 kV rated surge voltage (impulse withstand) means it can live on a 400 V panel without external MOVs for basic transient protection. Pollution degree 3 and IP20 front — fine for a standard IP54 or IP65 enclosure; the front is touch-safe, but the terminals need enclosure protection. Shock resistance of 10g / 5 ms and 5g / 10 ms is adequate for machine-mounted panels, not for direct engine-mount.","metaTitle":"Siemens 3RH1344-1BB40-0AA1 SIRIUS Auxiliary Contactor, 4 NO,","metaDescription":"Siemens SIRIUS auxiliary contactor 3RH1344-1BB40-0AA1, 4 NO contacts, 24 VDC coil, rated 10 A at AC-12. Snap-on DIN rail, S00 size, IP20 front. Active production. Quoted to order.","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":"24 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","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 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)","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=295070&mlfb=3RH1344-1BB40-0AA1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1BB40-0AA1/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of 3RH1344-1BB40-0AA1?","answer":"4 NO contacts, 24 V DC coil, rated 10 A at AC-12, 6 A at 230 V, 1 A at 690 V. Size S00, 45 mm wide, snap-on DIN rail mount, IP20 front."},{"question":"Where can I buy 3RH1344-1BB40-0AA1?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial response."},{"question":"Will 3RH1344-1BB40-0AA1 drop into a panel specified around 3RH2140-1BP40 without rewiring?","answer":"No — 3RH2140-1BP40 is a different frame size and contact configuration. The 3RH1344-1BB40-0AA1 is size S00 with 4 NO contacts; the 3RH2140 series is size S0 with different terminal layout and mounting rail. A direct swap would require re-termination and possibly a wider DIN footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-1BB40-0AA1","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/3RH1344-1BB40-0AA1 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}}