{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2037-3AF00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2037-3AF00","canonicalUrl":"https://aoctrl.com/siemens/3RT2037-3AF00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2037-3AF00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2037-3AF00 power contactor, size S2, 65 A at 480 V AC-3, 110 V 50 Hz coil, spring-type terminals, auxiliary switch, 3-pole, DIN rail mount.","salesMarkdown":"## S2 frame contactor — 65 A at 480 V AC-3 motor duty The 3RT2037-3AF00: This SIRIUS power contactor, size S2, is rated for 65 A at 480 V in AC-3 duty — the motor-switching rating that governs the real load, not the AC-1 resistive figure. At 230 V it carries 10 hp, which lines up with a typical 10 HP three-phase motor on a 230 V supply. The coil pulls 110 V at 50 Hz. The magnet coil termination uses spring-type terminals, so you land the control wires without a screwdriver — push the ferrule in and the cage holds. The auxiliary switch is present, configurable as 18 normally-open and 1 normally-closed main contact arrangement, which gives you a feedback contact for the PLC or a seal-in circuit. Arcing time runs 10 to 18 ms at AC, total arc duration 10 to 20 ms. That window matters for coordination with upstream short-circuit protection — the contactor clears the arc before the breaker's magnetic trip responds, provided the let-through energy stays within the contactor's withstand rating. ## DIN rail fit and panel clearances Width is 55 mm — that's three 18 mm module slots on a standard DIN rail. Side clearance to adjacent devices is 6 mm; upward and forward clearance 10 mm each; downward clearance also 10 mm. Depth is 130 mm, height 114 mm. The 60 °C ceiling means the contactor can sit in a non-ventilated panel near a drive heat sink without derating, provided the ambient inside the enclosure stays below that figure. ## Switching cycle limits and auxiliary contact DC ratings Maximum switching rate at AC-1 (resistive load) is 800 cycles per hour; at AC-3 (motor start) it's 700 per hour; at AC-4 (plugging/inching) it drops to 200 per hour. The AC-3e rating also shows 700 per hour. These set the thermal duty cycle — if your process calls for frequent starts (conveyor indexing, crane hoist), stay below the AC-4 ceiling or the contactor will overheat. These are the DC-13 switching limits for the built-in auxiliary — if your PLC input or interlock circuit runs at 24 VDC, the contact can break 10 A, which is well above a typical 0.5 A PLC input draw. Typical mechanical life of the contactor is 10,000,000 operations. The electrical life depends on the switching category and load current — at AC-3 rated current expect roughly 1-2 million operations before the main contacts need replacement. Sourced to order against the BOM quantity.","metaTitle":"Siemens 3RT2037-3AF00 SIRIUS Power Contactor, 65 A at 480 V","metaDescription":"Siemens 3RT2037-3AF00 SIRIUS power contactor, size S2, 65 A at 480 V AC-3, 110 V 50 Hz coil, spring-type terminals, DIN rail mount, active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Width":"55 mm","at AC":"10 ... 18 ms","Height":"114 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.37","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"6 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","at AC-1 maximum":"800 1/h","at AC-2 maximum":"400 1/h","at AC-3 maximum":"700 1/h","at AC-4 maximum":"200 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","at AC-3e maximum":"700 1/h","For Main Contacts":"18 ... 1","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":"S2","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"10 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"65 A","at 50 Hz rated value":"110 V","at 500 V rated value":"2 A","at 600 V rated value":"52 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"5 hp","at 200/208 V rated value":"20 hp","at 220/230 V rated value":"20 hp","at 460/480 V rated value":"50 hp","at 575/600 V rated value":"50 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"11.4 W","at AC-2 at 400 V rated value":"30 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"55 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2014","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"70.4 A","at AC-5b up to 400 V rated value":"53.9 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 125A (690V,100kA), aM: 63A (690V,100kA), BS88: 100A (415V,80kA)","Without Load Current Share Typical":"16 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"3.8 W","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","Limited To 1 S Switching At Zero Current Maximum":"1 055 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"730 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"520 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"336 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"272 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"25 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/03310ba0e1037489fdc7365e7c504116.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=2049&mlfb=3RT2037-3AF00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2037-3AF00/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2037-3AF00","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/3RT2037-3AF00 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}}