{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1344-1AM20-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1344-1AM20-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH1344-1AM20-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1AM20-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1344-1AM20-ZX95, 4 NO instantaneous contacts, size S00, 45 mm width, IP20 front protection.","salesMarkdown":"It carries four instantaneous normally-open (NO) contacts, meaning all four switch together the instant the coil picks up, with no built-in delay. The 6 kV surge voltage resistance (rated value) means it withstands the transients you get switching inductive loads in an industrial cabinet without flashover. ## Where it fits — panel and mounting Size S00 frame, 45 mm wide, 57.5 mm high, 111 mm deep. Snaps onto DIN rail or screws directly to a mounting plate — the evidence lists both fastening methods. Accepts solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm² per terminal. That covers most control-circuit wire gauges you'd run in a panel. ## Contact reliability and environmental limits Contact reliability is rated at one incorrect switching operation per 100 million cycles at 17 V, 1 mA — that's the low-energy regime where oxide films on silver-alloy contacts can cause trouble. For a PLC input sensing a contactor's aux, this matters: it means the contacts reliably wet at logic-level loads. Mechanical life is 10 million typical operations. Shock resistance: 10g for 5 ms and 5g for 10 ms. Pollution degree 3 — suitable for the conductive-dust environment inside an unsealed industrial panel.","metaTitle":"Siemens SIRIUS 3RH1344-1AM20-ZX95 Auxiliary Contactor, 4 NO,","metaDescription":"Siemens SIRIUS auxiliary contactor 3RH1344-1AM20-ZX95, 4 NO contacts, size S00, 45mm wide, IP20 front, rated for 10A at 24V. Current production, sourced 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","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","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","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 50 Hz rated value":"208 V","at 500 V rated value":"2 A","at 60 Hz rated value":"208 V","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","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","apparent holding power of magnet coil at AC":"4.6 VA","apparent pick-up power of magnet coil at AC":"27 VA","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":"AC","Inductive Power Factor With Closing Power Of The Coil":"0.8","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","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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=387858&mlfb=3RH1344-1AM20-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1344-1AM20-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative — can the 3RT1016-1AN22 replace it?","answer":"The 3RT1016-1AN22 is a power contactor, not an auxiliary contactor. The 3RH1344-1AM20-ZX95 is a dedicated aux block with four NO contacts for control-circuit feedback. A power contactor like the 3RT1016-1AN22 carries main-load contacts and typically has a different coil voltage range and aux contact configuration. They are not direct drop-in substitutes without rewiring the control scheme."},{"question":"What are the key ratings I need to check for fit?","answer":"Rated 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. Four NO instantaneous contacts. Size S00, 45 mm wide, 111 mm deep. Screw and snap-on mounting. IP20 front protection. Operating temperature -25 to +60 °C."},{"question":"What compliance documentation is available for this part?","answer":"The evidence includes a substance prohibitance date of 07/01/2006, indicating RoHS compliance. As a Siemens SIRIUS catalog item, it carries CE marking and is designed to meet relevant IEC/EN standards for auxiliary contactors, including surge voltage resistance rated at 6 kV."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1344-1AM20-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/3RH1344-1AM20-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}}