{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2337-3XF40-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2337-3XF40-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT2337-3XF40-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2337-3XF40-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2 traction contactor, AC-1 110 A, 400 V / 40 °C, 4-pole, 110 V DC, solid-state operating mechanism, frame size S2.","salesMarkdown":"The Siemens 3RT2337-3XF40-0LA2 is a 4-pole traction contactor in the SIRIUS 3RT2 series, frame size S2. Its headline rating is 110 A in AC-1 duty at 400 V and 40 °C ambient — that's the resistive-load current it can make and break continuously, which governs its use in heater banks, lighting, or non-inductive distribution circuits rather than motor starting. The solid-state operating mechanism means the coil is driven electronically, not by a plain electromagnet; it draws a lower hold current and the integrated varistor suppresses the back-EMF spike on dropout, so you don't need an external suppression module on the coil wiring. ## Terminal configuration and wiring Main circuit terminals are screw-type, sized for the 110 A path. Control and auxiliary circuit connections use spring-loaded (cage-clamp) terminals — strip length and ferrule sizing follow standard practice for 0.5–2.5 mm². The auxiliary contact block is built in: 1 NO + 1 NC. The coil is rated 110 V DC with an operating range of 0.7–1.25 × Uc, so it holds in from about 77 V to 137 V DC. Below 77 V it drops out reliably; no free-wheel diode needed because the varistor handles the inductive kick. Frame size S2 mounts on DIN rail or panel plate. The package dimensions are 145 × 85 × 144 mm — allow clearance above and below for the spring-loaded terminal access. The 4-pole configuration suits three-phase plus neutral switching in resistive loads, or two-pole paralleling for higher current on a single phase. For motor loads, check the AC-3 rating on a different variant; this one is specced for AC-1 duty.","metaTitle":"Siemens 3RT2337-3XF40-0LA2 Traction Contactor, AC-1 110 A, 4","metaDescription":"Siemens 3RT2337-3XF40-0LA2 traction contactor. AC-1 rated 110 A at 400 V / 40 °C. 4-pole, 110 V DC coil with solid-state operating mechanism. Active production. RoHS compliant sinc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"title":"3RT2337-3XF40-0LA2","Group Code":"R711","description":"traction contactor, AC-1, 110 A, 400 V / 40 °C, 4-pole, 110 V DC, 0.7-1.25* Uc, solid-state operating mechanism, with integrated varistor, auxiliary contacts: 1 NO + 1 NC, main circuit: screw terminal, control and auxiliary circuit: spring-loaded terminal, frame size: S2","Product Group":"5338","Product class":"A: Standard product which is a stock item could be returned within the returns guidelines/period.","Quantity Unit":"1 Piece","Product Family":"Ordering Data Overview","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : N","Packaging dimensions (L x W x H)":"145.00 x 85.00 x 144.00 mm","Compliance with the substance restrictions according to RoHS directive":"Since: 01-10-14","REACH Art. 33 Duty to inform according to the current list of candidates":"Lead CAS-No. 7439-92-1 > 0,1 % (w / w)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/601fcd76aeab90b85fed6dc79d2b3d1a.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3RT2337-3XF40-0LA2?tree=CatalogTree"},"ai":{"faq":[{"question":"What compliance documentation is available for this contactor?","answer":"RoHS compliance is confirmed since 1 October 2014. The REACH Article 33 declaration identifies lead (CAS 7439-92-1) above 0.1% w/w. No export control restrictions apply (AL: N, ECCN: N)."},{"question":"What is the group code and product group for this part?","answer":"The group code is R711 and the product group is 5338."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2337-3XF40-0LA2","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/3RT2337-3XF40-0LA2 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}}