{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2637-1AP03","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2637-1AP03","canonicalUrl":"https://aoctrl.com/siemens/3RT2637-1AP03","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2637-1AP03","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS capacitor contactor, size S2, 3RT2637-1AP03, 230 V AC 50 Hz coil, screw-type terminals, 65 mm width, 114 mm height, 130 mm depth, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The Siemens 3RT2637-1AP03 is a SIRIUS capacitor contactor in size S2, designed for switching capacitive loads — typically power-factor correction banks in industrial distribution panels. Its 230 V AC 50 Hz coil (screw-type terminals) pulls in and drops out with a 10–18 ms response, and the contactor is rated for switching frequencies up to 100 operations per hour at 230 V. The 65 mm wide, 114 mm high, 130 mm deep body mounts via screw or snap-on onto 35 mm DIN rail per EN 50022. ## Switching Capacity and Duty The main contacts handle 6 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0 A at 690 V — the zero at 690 V confirms this is a capacitor-switching contactor, not a general-purpose motor contactor. The auxiliary contact (1 N/O instantaneous) is rated at 60 V / 2 A, 110 V / 1 A, 125 V / 0.9 A, and 220 V / 0.3 A. Maximum switching frequency drops from 100 ops/h at 230–400 V (–) to 25 ops/h at 690 V, reflecting the increased stress at higher voltages. Main power terminals accept solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), or 2x 4 mm². Stranded terminations: 2x (10–35 mm²) or 1x (10–50 mm²). At 40 °C, a single 50 mm² conductor is allowed; at 60 °C, two 35 mm² conductors. The coil terminals are screw-type.","metaTitle":"Siemens 3RT2637-1AP03 SIRIUS Capacitor Contactor, S2, 230 V","metaDescription":"Siemens 3RT2637-1AP03 SIRIUS capacitor contactor, size S2, 230 V AC 50 Hz coil, screw terminals, 65 mm wide, DIN rail mount. Sourced to order. Request a quote.","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), 2x 4 mm²","Width":"65 mm","at AC":"10 ... 18 ms","Height":"114 mm","at 24 V":"6 A","at 60 V":"2 A","Stranded":"2x (10 ... 35 mm²), 1x (10 ... 50 mm²)","at 110 V":"1 A","at 125 V":"0.9 A","at 220 V":"0.3 A","at 230 V":"6 A","at 400 V":"3 A","at 50 Hz":"0.8 ... 1.1","at 690 V":"0 A","at 40 °C":"1x 50 mm²","at 60 °C":"2x 35 mm²","Attachable":"1","Arcing Time":"10 ... 20 ms","1 Rated Value":"50 Hz","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"AC","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022","at 230 V maximum":"100 1/h","at 240 V maximum":"100 1/h","at 400 V maximum":"100 1/h","at 480 V maximum":"50 1/h","at 500 V maximum":"45 1/h","at 600 V maximum":"32 1/h","at 690 V maximum":"25 1/h","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), 2x 4 mm²","Product Brand Name":"SIRIUS","Product Designation":"capacitor contactors","at 50 Hz rated value":"230 V","Instantaneous Contact":"1","For Main Current Circuit":"screw-type terminals","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","Substance Prohibitance (Date)":"05/01/2014","For Grounded Parts At The Side":"10 mm","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","At Contactor For Auxiliary Contacts":"Screw-type terminals","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","With Side-By-Side Mounting At The Side":"10 mm","Electrical Endurance (Operating Cycles)":"150 000","number of NC contacts for main contacts":"0","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":"0.00000001","mirror contact according to IEC 60947-4-1":"No","apparent holding power of magnet coil at AC":"16 VA","apparent pick-up power of magnet coil at AC":"190 VA","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","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.72","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.37","Of The Contactor With Added Auxiliary Switch Block Typical":"3 000 000","operational current of auxiliary contacts at AC-12 maximum":"10 A","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)","AWG number as coded connectable conductor cross section for main contacts":"18 ... 0","For Short-Circuit Protection Of The Main Circuit With Type Of Coordination 1 Required":"gG: 200 A (690 V, 50 kA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=405645&mlfb=3RT2637-1AP03","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2637-1AP03/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT2637-1AP03?","answer":"The depth is 130 mm."},{"question":"What solid conductor sizes does 3RT2637-1AP03 accept?","answer":"It accepts 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), or 2x 4 mm² solid conductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2637-1AP03","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/3RT2637-1AP03 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}}