{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2037-1AF00-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2037-1AF00-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT2037-1AF00-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2037-1AF00-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 power contactor, 3RT2037-1AF00-ZX95, 65 A at 480 V AC-3, screw/snap-on 35 mm DIN rail, auxiliary switch equipped.","salesMarkdown":"The S2 frame size tells you it handles the mid-range of the SIRIUS contactor family — above the S0, below the S3 — and the 65 A rating at 480 V AC-3 means it's sized for a 30–40 hp motor on a 480 V line, typical for pumps, fans, or conveyors in a 480 V plant. The -ZX95 suffix is a Siemens special version code — it doesn't change the electrical ratings, but it flags a specific variant (often a customer-specific or custom-logged build). The base contactor carries an auxiliary switch as standard, with coil terminals as screw-type. Wire acceptance is 2x 0.5–1.5 mm² or 2x 0.75–2.5 mm² solid/stranded, which covers most panel wiring up to 12 AWG. The headline number is 65 A at 480 V — that's the AC-3 (motor starting) rating. AC-3 means switching a squirrel-cage motor: high inrush on make, lower current on break. For resistive loads (AC-1), the contactor can cycle more often — 800 ops/hour — but the AC-3 duty cycle of 700 ops/hour is the one that governs motor switching. The AC-4 rating (plugging/reversing) drops to 200 ops/hour, so if your application does frequent inching or reversing, derate the switching rate accordingly. The auxiliary contacts are rated across a range of voltages: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.6 A at 440 V, and 2 A at 500 V. That covers standard control voltages in both 24 VDC and 120/240 VAC control circuits. The 10 hp rating at 230 V gives a quick rule-of-thumb for 230 V single-phase motor loads. Arcing time is 10–20 ms, and operate time at AC is 10–18 ms. These are fast enough for most motor control circuits; the contactor closes and opens cleanly within a half-cycle of 50/60 Hz. Physical footprint: 114 mm high, 55 mm wide, 130 mm deep. That's the body dimensions; you need clearance for arc chutes and wiring. On a 35 mm DIN rail, the S2 width of 55 mm means it occupies about 3.1 standard 18 mm module spaces — plan your rail layout accordingly. That covers most panel orientations, including horizontal rails in a vertical enclosure. The storage range is wider — that's the handling/shipping limit, not the running limit.","metaTitle":"Siemens SIRIUS 3RT2037-1AF00-ZX95 Power Contactor, 65 A at 4","metaDescription":"Siemens SIRIUS 3RT2037-1AF00-ZX95 power contactor, Size S2. Rated 65 A at 480 V AC-3. Screw and snap-on 35 mm DIN rail. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"130 mm","Width":"55 mm","at AC":"10 ... 18 ms","Height":"114 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.37","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"6 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"800 1/h","at AC-2 maximum":"400 1/h","at AC-3 maximum":"700 1/h","at AC-4 maximum":"200 1/h","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","at AC-3e maximum":"700 1/h","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":"Power 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":"10 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"65 A","at 50 Hz rated value":"110 V","at 500 V rated value":"2 A","at 600 V rated value":"52 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"5 hp","at 200/208 V rated value":"20 hp","at 220/230 V rated value":"20 hp","at 460/480 V rated value":"50 hp","at 575/600 V rated value":"50 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"11.4 W","at AC-2 at 400 V rated value":"30 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"55 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2014","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"70.4 A","at AC-5b up to 400 V rated value":"53.9 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 125A (690V,100kA), aM: 63A (690V,100kA), BS88: 100A (415V,80kA)","Without Load Current Share Typical":"16 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"3.8 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","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 %","Type Of Voltage Of The Control Supply Voltage":"AC","Limited To 1 S Switching At Zero Current Maximum":"1 055 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"730 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"520 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"336 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"272 A; 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","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":"25 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b3fd76a8a313c0b12da3c72cd87271f7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=199908&mlfb=3RT2037-1AF00-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2037-1AF00-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"Body dimensions: 114 mm high, 55 mm wide, 130 mm deep. Required clearances: 10 mm up, down, and forward; 6 mm to the side. The 55 mm width occupies about 3.1 spaces on a 35 mm DIN rail."},{"question":"What is the AC-3 motor rating at 480 V?","answer":"65 A at 480 V AC-3. That's the motor-starting current rating. For a 480 V three-phase induction motor, this typically corresponds to a 30–40 hp motor, depending on the motor's full-load current."},{"question":"What auxiliary contact ratings are available?","answer":"The auxiliary contacts are rated: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.6 A at 440 V, and 2 A at 500 V (–). This covers 24 VDC control and 120/240 VAC control circuits."},{"question":"What compliance documentation is available?","answer":"The evidence does not list specific compliance certifications (UL, CSA, CE, RoHS) for this variant. As a standard Siemens SIRIUS product, it is typically CE-marked and UL-recognized, but the -ZX95 suffix may indicate a custom variant. Request the specific declaration from your Siemens channel or distributor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2037-1AF00-ZX95","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/3RT2037-1AF00-ZX95 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}