{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1373-6AF36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1373-6AF36","canonicalUrl":"https://aoctrl.com/siemens/3RT1373-6AF36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1373-6AF36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, size S12 contactor, 3RT1373-6AF36, AC coil 48-130 V, screw-type terminals, auxiliary switch, 225 x 184 x 180 mm.","salesMarkdown":"## SIRIUS S12 contactor, AC coil 48–130 V The Siemens 3RT1373-6AF36 is a SIRIUS-brand size S12 contactor with a 48–130 V AC coil rated for both 50 Hz and 60 Hz operation, drawing 17 VA at each frequency. The screw-type coil terminals and integrated auxiliary switch make it a direct fit for motor-starting and resistive-load switching in standard control panels. Mounting position is flexible: vertical surface with ±180° rotation, or tilted forward/backward ±30° at 0° rotation, or standing — useful when retrofitting into existing enclosures where the rail orientation is already fixed. The auxiliary contact block carries a rated current of 4 A at 230 V AC and 3 A at 400 V AC, with lower ratings at 24 V DC (3 A) and 110–125 V DC (0.55 A). Dimensions are 225 mm height, 184 mm width, 180 mm depth — the S12 frame occupies a standard footprint on the mounting surface. Fastening is by screw fixing, not DIN-rail snap-on, so plan for drilled holes or a mounting plate. The main circuit terminals accept 1x (1–4 mm²) or 2x (1–4 mm²) solid or stranded copper; the same range applies to the auxiliary terminals. ## Auxiliary contact ratings across the voltage range The auxiliary switch is rated for breaking at multiple DC voltages: 3 A at 24 V, 1.5 A at 48 V, 0.55 A at 110 V and 125 V, 0.3 A at 220 V. On AC: 4 A at 230 V, 3 A at 400 V, 2 A at 500 V and 690 V. These are the maximum breaking currents — derate for inductive loads. The AC ratings at 400 V and 690 V cover the common European low-voltage distribution levels, while the 500 V rating suits some North American 480 V circuits.","metaTitle":"Siemens 3RT1373-6AF36 SIRIUS Contactor, S12, AC Coil 48-130V","metaDescription":"Siemens 3RT1373-6AF36 SIRIUS contactor, size S12, AC coil 48-130V 50/60Hz, 3-pole, screw terminals, auxiliary switch included. Current lifecycle. Sourced to order.","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","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","at AC in hot operating state":"128 W","at AC-3 at 400 V rated value":"132 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":"32 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":"240 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1043715&mlfb=3RT1373-6AF36","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1373-6AF36/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RT1373-6AF36 and how is it quoted for volume purchases?","answer":"The part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for volume pricing and lead-time details."},{"question":"What is 3RT1373-6AF36's listed depth?","answer":"The depth is 180 mm, with a height of 225 mm and width of 184 mm."},{"question":"What conductor sizes does the 3RT1373-6AF36 accept?","answer":"The terminals accept 1x (1–4 mm²) or 2x (1–4 mm²) solid or stranded copper for both main and auxiliary circuits."},{"question":"Will 3RT1373-6AF36 drop into a panel specified around 3RT1075-6AB36 without rewiring?","answer":"Both are SIRIUS contactors but the 3RT1075-6AB36 is a different frame size and coil voltage variant — physical dimensions and terminal layout differ, so panel fit and wiring are not guaranteed without verifying the mounting footprint and terminal positions against the existing cutout and wiring plan."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1373-6AF36","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/3RT1373-6AF36 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}}