{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2337-1AC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2337-1AC20","canonicalUrl":"https://aoctrl.com/siemens/3RT2337-1AC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2337-1AC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 contactor, 3RT2337-1AC20, AC coil 24 V at 50/60 Hz, screw-type terminals, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## What This SIRIUS S2 Contactor Does in Your Panel The 3RT2337-1AC20 is a SIRIUS S2 contactor from Siemens — current production, active line. It's built to switch motor loads in control panels, and the S2 frame size tells you it's the middle-duty chassis in the SIRIUS family, good for a range of industrial motor applications up to its rated thermal current. That's handy when you're squeezing this into a crowded backpanel and the rail isn't perfectly level. Clearance distances are tight — 10 mm up, down, and forward, 6 mm to the side — so you can pack these side-by-side in a row without leaving a gap the size of your fist. The depth is 130 mm, width 75 mm, height 114 mm, which is a standard S2 footprint. ## Ratings That Matter on the Line Out here in the grease, a contactor that sees one cycle per minute on a conveyor line will run nearly 20 years before the mechanicals wear out. The main contact rating is listed as 18 to 1. The auxiliary switch is included, with contact ratings: 10 A at 24 V AC, 10 A at 230 V, 3 A at 400 V, 1 A at 690 V. ## Wiring and Integration Terminals accept solid or stranded wire: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). That's standard for control wiring — you can land two 1.5 mm² conductors per terminal for daisy-chaining or paralleling auxiliary circuits. Power consumption is 0.36 A at 50 Hz and 0.39 A at 60 Hz — about 9 VA on a 24 VAC transformer. That's low enough that a standard 50 VA control transformer can drive several of these plus a PLC and some relays. Up to two auxiliary switches can be attached (the unit ships with one included). If your circuit needs extra N/O or N/C contacts for feedback or interlocks, you can snap on a second without rewiring the main coil.","metaTitle":"Siemens 3RT2337-1AC20 SIRIUS Contactor, AC Coil 24 V 50/60 H","metaDescription":"Siemens 3RT2337-1AC20 SIRIUS contactor, S2 frame, AC coil 24 V at 50/60 Hz. Screw/snap-on DIN rail mount, 10 million mechanical cycles. Current production, sourced to order. Reques","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":"3RT2337-1AC20","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, 24 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":"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 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)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"9.7 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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=695145&mlfb=3RT2337-1AC20"},"ai":{"faq":[{"question":"What are the key dimensions of the 3RT2337-1AC20?","answer":"Depth is 130 mm, width 75 mm, height 114 mm. That's the standard S2 frame footprint. Clearance: 10 mm above, below, and in front; 6 mm to the sides."},{"question":"Will the 3RT2337-1AC20 drop into a panel specified for a 3RT2326-1BK80?","answer":"Both are SIRIUS S2 frame contactors with the same mounting footprint and DIN-rail clip. The 3RT2326-1BK80 is a DC coil variant; the 3RT2337-1AC20 is AC coil. If your panel was wired for a 24 VAC control transformer, this is a direct swap. If the original was 24 VDC, you'd need to change the coil supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2337-1AC20","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/3RT2337-1AC20 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}}