{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-2BB40-ZW95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-2BB40-ZW95","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-2BB40-ZW95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-2BB40-ZW95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 24 VDC coil, 4 NO contacts, screw and snap-on mounting, IP20 front.","salesMarkdown":"## Integrator's note on the 3RH1344-2BB40-ZW95 It's designed for control-circuit switching in motor starter assemblies or as a signal repeater in PLC output circuits. The DC coil draws 3.2 W both on pickup and hold, so the PLC output or relay driving it must be rated for that continuous load — no coil economizer is built in. Switching capacity is rated per contact across several voltage levels: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. For DC control circuits, it also carries 1 A at 110 V and 0.27 A at 220 V. These are the thermal current ratings; for motor-circuit auxiliary duty, derate per the contactor's utilization category (typically AC-15 for solenoid loads). The size S00 footprint — 45 mm wide, 60 mm high, 114 mm deep — leaves room for a standard 4-pole contactor in a compact panel. Terminals accept 2x (0.25... 2.5 mm²) solid or stranded wire (2x 24... 14 AWG).","metaTitle":"Siemens SIRIUS 3RH1344-2BB40-ZW95 Auxiliary Contactor, 24 VD","metaDescription":"Siemens SIRIUS 3RH1344-2BB40-ZW95 auxiliary contactor, 24 VDC coil, 4 NO contacts, size S00. Rated 10 A at 24 V, 6 A at 230 V. IP20 front, screw and snap-on mounting. Active produc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"114 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 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","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 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 %","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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":"Cage Clamp 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=161079&mlfb=3RH1344-2BB40-ZW95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-2BB40-ZW95/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 3RH1344-2BB40-ZW95 accept?","answer":"Terminals accept 2x (0.25... 2.5 mm²) solid or stranded wire, or 2x (24... 14 AWG)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-2BB40-ZW95","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/3RH1344-2BB40-ZW95 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}}