{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2337-1DA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2337-1DA40","canonicalUrl":"https://aoctrl.com/siemens/3RT2337-1DA40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2337-1DA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 contactor, 3RT2337-1DA40, 24 VDC coil, 10 A rated operational current at 230 V AC-1, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The Siemens 3RT2337-1DA40 is a SIRIUS S2-frame contactor with a 24 VDC coil, rated for 10 A at 230 V AC-1 (resistive load) and 10 A at 24 V DC. It mounts via screw or snap-on onto 35 mm standard mounting rail per DIN EN 60715, with a footprint of 75 mm width, 114 mm height, and 130 mm depth. The 10 A AC-1 rating at 230 V covers resistive heating, lighting, and distribution loads; for motor starting (AC-3 duty) the main contact rating range is listed as 18 down to 1 A — the actual AC-3 current depends on the motor power and utilization category, so size the contactor to the motor full-load amps, not the AC-1 figure. The DC switching capability spans 10 A at 24 V down to 0.3 A at 220 V, with arcing time of 10–20 ms and operate times of 10–18 ms AC / 50–110 ms DC — useful for DC brake or control circuits. An auxiliary switch is included, saving a separate add-on block for basic status feedback. The terminal accepts solid conductors from 0.5 to 1.5 mm² and stranded from 0.75 to 2.5 mm² — standard for control wiring in a panel. ## Mounting and spacing The S2 frame size allows up to 2 auxiliary contact blocks attachable. Screw terminals are accessible from the front with IP00 protection at the connection point — plan for finger-safe shrouding or enclosure depth to maintain safe separation.","metaTitle":"Siemens 3RT2337-1DA40 SIRIUS S2 Contactor, 24 VDC Coil, 10 A","metaDescription":"Siemens 3RT2337-1DA40 SIRIUS S2 contactor. 24 VDC coil, 10 A at 230 V AC-1. Screw/snap-on DIN rail. 75x114x130 mm. Current production. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Solid":"2x (0.5 ... 1,5mm²), 2x (0.75 ... 2.5 mm²)","Width":"75 mm","at AC":"10 ... 18 ms","at DC":"50 ... 110 ms","title":"3RT2337-1DA40","Height":"114 mm","Maximum":"10 A","Upwards":"10 mm","Forwards":"10 mm","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, S2, 4-pole, 12 V DC, with varistor, 1 NO+1 NC, screw terminal","On The Front":"IP20","Initial Value":"0.8","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","Of The Terminal":"IP00","Type of voltage":"DC","at AC-1 maximum":"700 1/h","lifecycle_stage":"current","Auxiliary switch":"Yes","During Operation":"95 %","Full-scale value":"1.1","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","at DC rated value":"12 V","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":"690 V","at 500 V rated value":"2 A","at 60 Hz rated value":"690 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","Single Or Multi-Stranded":"2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²)","Of Main Circuit Rated Value":"6 kV","at maximum AC-1 rated value":"35 mm²","Design of the surge suppressor":"with varistor","Of Auxiliary Circuit Rated Value":"6 kV","Function Module For Communication":"No","Closing power of magnet coil at DC":"25 W","Product function Bus communication":"No","With Type Of Assignment 2 Required":"gR: 80 A (690 V, 100 kA)","Protection against electrical shock":"finger-safe when touched vertically from front acc. to IEC 60529","at AWG conductors for main contacts":"2x (18 ... 2), 1x (18 ... 1)","Mirror contact acc. to IEC 60947-4-1":"Yes","With Type Of Coordination 1 Required":"gG: 160 A (690 V, 100 kA)","Reference code acc. to DIN EN 81346-2":"Q","Number of NO contacts for main contacts":"4","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","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","Product function Short circuit protection":"No","at ambient temperature 40 °C rated value":"110 A","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":"DC","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","positively driven operation acc. to IEC 60947-5-1":"No","Contact rating of auxiliary contacts according to UL":"A600 / P600","Of The Contactor With Added Auxiliary Switch Block Typical":"100 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (690 V, 1 kA)"}},"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=426149&mlfb=3RT2337-1DA40"},"ai":{"faq":[{"question":"What are the key ratings for 3RT2337-1DA40?","answer":"24 VDC coil, 10 A at 230 V AC-1, 10 A at 24 V DC. Main contact rating range 18...1 A. Arcing time 10–20 ms. Operate time 10–18 ms AC, 50–110 ms DC. Dimensions 75 x 114 x 130 mm."},{"question":"Where can I buy 3RT2337-1DA40?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the mounting method for 3RT2337-1DA40?","answer":"Screw and snap-on mounting onto 35 mm standard mounting rail per DIN EN 60715. Mounting position allows +/-180° rotation on vertical surfaces and +/-22.5° tilt."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2337-1DA40","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/3RT2337-1DA40 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}}