{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2337-1AL20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2337-1AL20","canonicalUrl":"https://aoctrl.com/siemens/3RT2337-1AL20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2337-1AL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2337-1AL20 contactor, S2 frame, 230 V 50/60 Hz AC coil, screw-type terminals, screw and snap-on mounting to 35 mm DIN rail.","salesMarkdown":"## Main contact and auxiliary contact ratings The 3RT2337-1AL20: The main contacts are rated for AC-3 duty with a range from 18 A down to 1 A, covering the common motor sizes you'd see on pumps, fans, and small conveyors out in the plant. The S2 frame is the physical envelope — it tells you the mounting hole pattern and the busbar spacing you'll need in the panel. That means the same aux block works across 24 V PLC outputs and 230 V pilot circuits without swapping contacts. Coil pick-up time is 10 to 18 ms AC, and the arcing time on dropout is 10 to 20 ms — numbers that matter when you're coordinating with upstream protection or sequencing multiple contactors in a star-delta start. ## Environmental tolerance and wiring The coil draws 0.36 A at 50 Hz and 0.39 A at 60 Hz, a small enough difference that the same control transformer handles both. The screw-type terminals are the standard industrial choice — reliable under vibration, no special tooling needed on the line. Clearance spacing: 10 mm upwards and forwards, 6 mm at the sides, 10 mm downwards. That's the minimum air gap to adjacent metalwork or other contactors — stick to it and you avoid arc flash tracking between phases.","metaTitle":"Siemens 3RT2337-1AL20 SIRIUS Contactor, S2 Frame, 230 V Coil","metaDescription":"Siemens 3RT2337-1AL20 SIRIUS contactor, S2 frame, 230 V 50/60 Hz AC coil, screw-type terminals. Screw and snap-on mounting to 35 mm DIN rail.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"75 mm","at AC":"10 ... 18 ms","title":"3RT2337-1AL20","Height":"114 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.36","at 60 Hz":"0.39","Downwards":"10 mm","Attachable":"2","Arcing Time":"10 ... 20 ms","At The Side":"6 mm","description":"contactor AC-1, 110 A, 400 V / 40 °C, 4-pole, 230 V AC, 50/60 Hz, auxiliary contacts: 1 NO + 1 NC, screw terminal, size: S2","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"AC","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","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 ... 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":"6 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 A","at 400 V rated value":"3 A","at 50 Hz rated value":"230 V","at 500 V rated value":"2 A","at 60 Hz rated value":"230 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 Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC in hot operating state":"38.8 W","Substance Prohibitance (Date)":"10/01/2014","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":"gR: 80 A (690 V, 100 kA)","At Contactor For Auxiliary Contacts":"Screw-type terminals","operating frequency at AC-1 maximum":"700 1/h","With Type Of Coordination 1 Required":"gG: 160 A (690 V, 100 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"9.7 W","number of NO contacts for main contacts":"4","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":"4","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","Finely Stranded Without Core End Processing":"0.5 ... 2.5 mm²","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","Limited To 1 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"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","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":"35 mm²","Of The Auxiliary And Control Circuit With Degree Of Pollution 3 Rated Value":"690 V","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/ca192699cf31b1a6b3427c82809b93b4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=86886&mlfb=3RT2337-1AL20"},"ai":{"faq":[{"question":"What is the 3RT2337-1AL20's depth?","answer":"The depth is 130 mm, with a width of 75 mm and a height of 114 mm. That's the S2 frame envelope — measure your enclosure depth against the 130 mm before you order."},{"question":"Can I get a quote or check availability for 3RT2337-1AL20?","answer":"Submit an RFQ and we'll confirm current availability and pricing for your quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2337-1AL20","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/3RT2337-1AL20 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}}