{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1374-6AF36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1374-6AF36","canonicalUrl":"https://aoctrl.com/siemens/3RT1374-6AF36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1374-6AF36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS contactor, size S12, 3RT1374-6AF36, 48-130 V AC coil, screw-type terminals, 2 instantaneous auxiliary contacts.","salesMarkdown":"The S12 frame is a common footprint in European-style panels, and this one carries a 48-130 V AC coil — that's the voltage range the coil will pull in at, not the main contact rating. The coil draws 17 VA at both 50 and 60 Hz, so the control transformer sizing is straightforward across line frequencies. It's a screw-fixing mount, not a DIN-rail snap-on, so you'll be bolting it to a backplate or mounting rail. The mounting position is flexible: vertical surface, can be rotated ±180°, and with 0° rotation can be tilted forward or backward ±30°, or standing. That gives you some layout freedom in a crowded cabinet. The coil pickup voltage is 0.8 x rated value, and dropout is 1.1 x rated value — so on a 110 V AC control circuit, the coil will pick up at about 88 V and drop out around 121 V. That's a standard margin for AC contactors, but worth checking if your control voltage sags under load. The auxiliary contact block is built in — 2 instantaneous contacts, rated at 24 V (3 A), 48 V (1.5 A), 110/125 V (0.55 A), 220 V (0.3 A), 230 V (4 A), 400 V (3 A), 500 V (2 A), and 690 V (2 A). Those are the switching capacities for the aux contacts, not the main poles. The 4 A at 230 V is the highest figure, so if you're switching a 230 V pilot light or PLC input, that's your limit per contact. Not a fast-switching device, but typical for a contactor this size. ## Physical fit and clearances Dimensions: 225 mm high, 184 mm wide, 180 mm deep. That depth is the body depth, not including any protruding terminals or arc chutes — check your enclosure depth against that figure. That's for heat dissipation and arc flash clearance, not just air flow. The contactor can handle up to 2 attachable auxiliary blocks if you need more than the built-in 2 contacts. No need to hunt surplus or broker channels. The SIRIUS series is widely stocked, and the S12 frame is a common size, so lead times are typically manageable through distribution.","metaTitle":"Siemens 3RT1374-6AF36 SIRIUS Contactor, S12, 48-130V AC Coil","metaDescription":"Siemens SIRIUS 3RT1374-6AF36 contactor, size S12, 48-130 V AC coil, screw terminals. Current lifecycle stage. Sourced to order. Depth 180 mm.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"180 mm","Solid":"1x (1 ... 4mm²), 2x (1 ... 4mm²)","Width":"184 mm","at AC":"45 ... 80 ms","at DC":"45 ... 80 ms","Height":"225 mm","Upwards":"10 mm","Forwards":"20 mm","at 50 Hz":"17 VA","at 60 Hz":"17 VA","Downwards":"10 mm","Attachable":"2","At The Side":"10 mm","Rated Value":"48 ... 130 V","Initial Value":"0.8","During Storage":"-40 ... +70 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"AC","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-40 ... +60 °C","Fastening Method":"screw fixing","Full-Scale Value":"1.1","Mounting Position":"For vertical mounting surface can be rotated +/-180°, and with 0° rotation can be tilted forward or backward +/- 30°, or standing","Size Of Contactor":"S12","Solid Or Stranded":"1x (1 ... 4mm²), 2x (1 ... 4mm²)","Product Brand Name":"SIRIUS","Product Designation":"Contactor","at 24 V rated value":"3 A","at 48 V rated value":"1.5 A","at 110 V rated value":"0.55 A","at 125 V rated value":"0.55 A","at 220 V rated value":"0.3 A","at 230 V rated value":"4 A","at 400 V rated value":"3 A","at 50 Hz rated value":"48 ... 130 V","at 500 V rated value":"2 A","at 60 Hz rated value":"48 ... 130 V","at 690 V rated value":"2 A","Instantaneous Contact":"2","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"18 ... 14","For Main Current Circuit":"Connection bar, broadened > 450A required","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","at AC in hot operating state":"200 W","at AC-3 at 400 V rated value":"160 kW","Substance Prohibitance (Date)":"03/27/2017","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"gG: 630 A (500 V, 100 kA)","Without Load Current Share Typical":"2.5 W","closing power of magnet coil at DC":"360 W","holding power of magnet coil at DC":"2.5 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","at AC in hot operating state per pole":"50 W","for AWG cables for auxiliary contacts":"1x (AWG 18 ... 14), 2x (AWG 18 ... 14)","number of NO contacts for main contacts":"4","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"1x (0.75 ... 2.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"4","Product Function Short Circuit Protection":"No","mirror contact according to IEC 60947-4-1":"Yes","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"AC/DC","contact rating of auxiliary contacts according to UL":"A600 / Q300","Of Main Circuit With Degree Of Pollution 3 Rated Value":"1 000 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (690 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"300 mm²","Of The Auxiliary And Control Circuit With Degree Of Pollution 3 Rated Value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2dd3a0d8d83d82b5b14bc338485a0605.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1043719&mlfb=3RT1374-6AF36","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1374-6AF36/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"The contactor measures 225 mm high, 184 mm wide, and 180 mm deep. Required clearances are 10 mm upwards and downwards, 20 mm forwards, and 10 mm at the sides."},{"question":"What coil voltage does this contactor use?","answer":"The coil is rated for 48-130 V AC, drawing 17 VA at both 50 Hz and 60 Hz. Pickup voltage is 0.8 x rated (about 38-104 V), dropout is 1.1 x rated (about 53-143 V)."},{"question":"Does it include auxiliary contacts?","answer":"Yes, it has 2 built-in instantaneous auxiliary contacts with screw-type terminals. They are rated for switching at various voltages up to 690 V, with the highest current rating being 4 A at 230 V."},{"question":"What wire sizes does the contactor accept?","answer":"The screw terminals accept 1x or 2x conductors from 1 to 4 mm², both solid and stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1374-6AF36","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/3RT1374-6AF36 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}}