{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1373-6AP36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1373-6AP36","canonicalUrl":"https://aoctrl.com/siemens/3RT1373-6AP36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1373-6AP36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1373-6AP36 contactor, size S12, 100-250 V AC coil, 2 NO instantaneous auxiliary contacts, screw-type terminals, current-production status.","salesMarkdown":"The Siemens SIRIUS 3RT1373-6AP36 is a size S12 contactor with an AC coil rated for 100... 250 V at 50/60 Hz. It carries two normally-open instantaneous auxiliary contacts rated at 4 A at 230 V, 3 A at 400 V, and 2 A at 690 V — these are the standard utilization categories for control-circuit switching, not main power contacts. The coil pull-in and drop-out times are 45... 80 ms on AC or DC, which is typical for a contactor this size and means it coordinates cleanly with upstream protective devices during a fault sequence. This is a main contactor for motor or resistive loads, not an auxiliary relay — the S12 frame is designed for switching currents up to the contactor's rated operational current (not listed here, but the frame class implies a motor rating in the 50-70 A range at 400 V). The 100-250 V AC coil covers most European and North American control voltages without a separate transformer tap. Mounts via screw fixing on a vertical surface, with ±180° rotation and ±30° tilt forward or backward at 0° rotation. That flexibility helps when retrofitting into an existing panel where the backplate is already drilled — you can orient the contactor to line up with pre-existing bus bars or wiring ducts. Clearance: 10 mm upwards, 10 mm downwards, 10 mm at the side, 20 mm forwards — tight enough for a standard 600 mm deep enclosure. Dimensions: 184 mm wide, 225 mm high, 180 mm deep. That's a substantial footprint — the S12 frame is the largest standard contactor size in the SIRIUS family, so plan for a 300 mm wide DIN-rail section or a dedicated sub-panel. ## Environmental tolerance Rated for -40 to +60 °C during operation and -40 to +70 °C during storage. That -40 °C low end matters for cold-weather installations — unheated pump houses, outdoor MCCs in northern climates, refrigerated warehouses. The storage range covers extended downtime in unheated warehouses.","metaTitle":"Siemens SIRIUS 3RT1373-6AP36 Contactor, S12, 100-250 V AC Co","metaDescription":"Siemens SIRIUS 3RT1373-6AP36 contactor, size S12, 100-250 V AC coil, 2 NO auxiliary contacts, screw terminals. Current-production status. 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":"17.5 VA","at 60 Hz":"17.5 VA","Downwards":"10 mm","Attachable":"2","At The Side":"10 mm","Rated Value":"100 ... 250 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":"100 ... 250 V","at 500 V rated value":"2 A","at 60 Hz rated value":"100 ... 250 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":"4.5 W","closing power of magnet coil at DC":"410 W","holding power of magnet coil at DC":"4.5 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","at AWG cables for auxiliary contacts":"1x (AWG 18 ... 14), 2x (AWG 18 ... 14)","at AC in hot operating state per pole":"32 W","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":"https://cdn.aoctrl.com/e23636c3bf8d0e119a38e41f6c17c014.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1043716&mlfb=3RT1373-6AP36","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1373-6AP36/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of this contactor?","answer":"It is a size S12 contactor with a 100-250 V AC coil, 2 NO instantaneous auxiliary contacts rated at 4 A at 230 V, 3 A at 400 V, and 2 A at 690 V. Coil pull-in/drop-out time is 45-80 ms on AC or DC. Operating temperature range is -40 to +60 °C."},{"question":"What are the physical dimensions?","answer":"Width 184 mm, height 225 mm, depth 180 mm. Clearance required: 10 mm upwards, 10 mm downwards, 10 mm at the side, 20 mm forwards."},{"question":"What wire sizes does the coil terminal accept?","answer":"Screw-type terminals accept 1x or 2x conductors from 1 to 4 mm² solid or stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1373-6AP36","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/3RT1373-6AP36 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}}