{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2446-1AC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2446-1AC20","canonicalUrl":"https://aoctrl.com/siemens/3RT2446-1AC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2446-1AC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Size S3 contactor, 3RT2446-1AC20, 24 V AC 50/60 Hz coil, screw-type terminals, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## SIRIUS S3 Contactor, 24 V AC Coil — Panel Integration Note The Siemens 3RT2446-1AC20 is a SIRIUS-branded Size S3 contactor with a 24 V AC 50/60 Hz coil, screw-type terminals, and an integrated auxiliary switch. It fastens via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, with ±180° rotation on a vertical surface and ±22.5° tilt forward/backward — useful when fitting into a crowded panel where orientation is constrained. Main power circuit accepts stranded conductors from 6 to 70 mm². The auxiliary switch terminates on screw terminals accepting solid wire 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²). Coil connections are also screw-type. ## Environmental Range and Clearances The 70 mm width, 140 mm height, and 152 mm depth define the DIN-rail footprint. Slot it into a panel with those gaps and it won't thermally derate under normal convection. ## Switching Performance Arcing time is 10–20 ms; at AC the contactor operates in 10–21 ms. The auxiliary contact is rated for resistive loads: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V.","metaTitle":"Siemens 3RT2446-1AC20 SIRIUS Contactor, S3, 24 V AC Coil","metaDescription":"Siemens 3RT2446-1AC20 SIRIUS contactor, size S3, 24 V AC 50/60 Hz coil, 10M mechanical cycles, screw terminals, DIN rail mount. Current-production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"70 mm","at AC":"10 ... 21 ms","title":"3RT2446-1AC20","Height":"140 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"6 ... 70 mm²","at 50 Hz":"0.35","at 60 Hz":"0.41","Downwards":"10 mm","Attachable":"2","Arcing Time":"10 ... 20 ms","At The Side":"10 mm","description":"contactor AC-1, 140 A, 690 V / 40 °C, 3-pole, 24 V AC, 50/60 Hz, auxiliary contacts: 1 NO + 1 NC, main circuit: box terminal, control and auxiliary circuit: screw terminal, size: S3","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"AC","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","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":"S3","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"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":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"24 V","at 500 V rated value":"2 A","at 60 Hz rated value":"24 V","at 600 V rated value":"0.1 A","at 690 V rated value":"1 A","Instantaneous Contact":"1","Side-By-Side Mounting":"Yes","For Main Current Circuit":"box terminal","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","at AC in hot operating state":"29.4 W","Substance Prohibitance (Date)":"03/01/2017","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gR: 250 A (690 V, 100 kA)","At Contactor For Auxiliary Contacts":"Screw-type terminals","operating frequency at AC-1 maximum":"650 1/h","With Type Of Coordination 1 Required":"gG: 250 A (690 V,100 kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"9.8 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","number of NC contacts for main contacts":"0","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), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Type Of Voltage For Main Current Circuit":"AC","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Product Function Short Circuit Protection":"No","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"AC","Of Main Circuit With Degree Of Pollution 3 Rated Value":"1 000 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":"50 mm²","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","Design Of The Miniature Circuit Breaker For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (230 V, 400 A)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b565132adc8ca4f5501331a77657e7cf.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=630060&mlfb=3RT2446-1AC20"},"ai":{"faq":[{"question":"Where can I buy the 3RT2446-1AC20?","answer":"This part is available to order against an RFQ through independent industrial distribution. Current pricing and availability are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2446-1AC20","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/3RT2446-1AC20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}