{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1440-1AK60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1440-1AK60","canonicalUrl":"https://aoctrl.com/siemens/3RH1440-1AK60","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1440-1AK60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, size S00, 3RH1440-1AK60, 4 NO instantaneous contacts, screw and snap-on mounting, IP20 front protection.","salesMarkdown":"It carries 4 normally-open instantaneous contacts, with no leading, lagging, delayed, or make-before-break switching. That's a straight NO-only block: you get four independent contact sets that close and open together. Mounting is screw-fixed or snap-on onto a DIN rail. The size S00 envelope — 90 mm wide × 57.5 mm high × 72 mm deep — fits the standard panel grid; it occupies roughly the same footprint as a miniature circuit breaker. The contact ratings are given at specific voltages, and they drop fast as voltage rises. At 24 V it's rated 10 A; at 230 V it's 6 A; at 400 V it's 3 A; at 690 V it's just 1 A. That's typical for an auxiliary contactor — the contacts are sized for control signals and small loads, not power circuits. If you're switching a 24 VDC PLC output or a 230 VAC pilot light, this block handles it. Don't try to break a motor starter's main coil at 400 V with it — that's what the contactor's own auxiliary contacts are for. That's a dry-circuit rating — low energy, gold-flash territory. For most industrial control circuits (24 V, tens of mA), it's effectively wear-out limited, not contact-stability limited. The SIRIUS platform is widely stocked, so cross-references are straightforward. The 3RH1440-1AK60 is the 4-NO variant; if your BOM calls for a different contact arrangement (e.g., 2 NO + 2 NC), that's a different order code in the same size S00 family. No functional second-source exists outside Siemens — the auxiliary contactor market is brand-locked to the panel design. Screw terminals accept 2× (0.5…1.5 mm²), 2× (0.75…2.5 mm²), or 2× 4 mm² solid. That's two conductors per clamp — handy for daisy-chaining common signals. Strip length is standard 8–10 mm; use ferrules on stranded wire to avoid whiskers under the cage. Shock resistance is 10g / 5 ms and 5g / 10 ms — fine for most industrial panels, but if your machine sees repetitive hammering from a press or crusher, check the mounting orientation: the contactor can be rotated ±180° on a vertical surface and tilted ±22.5° forward/backward. Keep the cabinet climate-controlled if condensation is a risk.","metaTitle":"Siemens 3RH1440-1AK60 SIRIUS Auxiliary Contactor, Size S00","metaDescription":"Siemens SIRIUS 3RH1440-1AK60 auxiliary contactor, size S00, 4 instantaneous NO contacts, screw/snap-on mount, IP20. Current production. Sourced 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","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":"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 50 Hz rated value":"110 V","at 500 V rated value":"2 A","at 60 Hz rated value":"120 V","at 690 V rated value":"1 A","Instantaneous Contact":"4","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","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","apparent holding power of magnet coil at AC":"4.6 V·A","apparent pick-up power of magnet coil at AC":"27 V·A","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"4","Type Of Voltage Of The Control Supply Voltage":"AC","B10 value with high demand rate acc. to SN 31920":"1 000 000; With 0.3 x Ie","Inductive Power Factor With Closing Power Of The Coil":"0.8","Identification Number And Letter For Switching Elements":"40 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","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":"$300.10","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=499488&mlfb=3RH1440-1AK60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1440-1AK60/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 3RH1440-1AK60 and 3RH2440-1AK60?","answer":"The 3RH2440-1AK60 is a different order code in the same SIRIUS auxiliary contactor family. The primary difference is the contact arrangement — confirm the NO/NC count on your BOM. Both are size S00 and share the same mounting and terminal specs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1440-1AK60","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/3RH1440-1AK60 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}}