{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2637-1NB35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2637-1NB35","canonicalUrl":"https://aoctrl.com/siemens/3RT2637-1NB35","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2637-1NB35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2 contactor, 3RT2637-1NB35, 20-33 V AC/DC coil, screw-type terminals, 65 mm width, 130 mm depth, 114 mm height, screw and snap-on mounting onto 35 mm DIN rail per DIN EN 50022.","salesMarkdown":"The Siemens 3RT2637-1NB35 is a SIRIUS 3RT2 contactor with a 20-33 V AC/DC coil, screw-type coil terminals, and a compact 65 mm width that screws or snaps onto 35 mm DIN rail per DIN EN 50022. The 130 mm depth and 114 mm height keep the footprint tight inside a control panel — no extra clearance needed beyond the standard DIN-rail envelope. The built-in auxiliary contacts are rated 6 A at 24 V, 6 A at 230 V, and 3 A at 400 V — so they handle PLC-level signals at 24 VDC and small motor-starter interlocking at 230 VAC without an external relay. At 400 V the 3 A rating covers most contactor feedback and status loops in a 400 V three-phase panel. The 0.9 A at 125 V and 0.3 A at 220 V give the DC switching curve for control transformers or DC bus monitoring. Solid wire capacity: 2x (0.5-1.5 mm²), 2x (0.75-2.5 mm²), 2x 4 mm². Stranded: 2x (10-35 mm²) or 1x (10-50 mm²). The screw-type coil terminals accept the same range, so no special crimp tools needed for the control circuit. ## Switching frequency and operating times Maximum switching frequency drops with voltage: 100 operations/hour at 230-240 V, 80/h at 400 V, 50/h at 480 V, 45/h at 500 V, 32/h at 600 V, and 25/h at 690 V. That curve tells you the contactor is sized for moderate-duty motor starting and general switching — not high-speed jogging or continuous cycling. ## Temperature range The storage range exceeds the operating range — that limit governs handling and shipping, not running conditions.","metaTitle":"Siemens 3RT2637-1NB35 Contactor, 20-33 V AC/DC Coil, 65 mm","metaDescription":"Siemens 3RT2637-1NB35 contactor, 20-33 V AC/DC coil, 65 mm width, screw/snap-on DIN rail mount. Aux contacts rated 6 A at 24 V, 3 A at 400 V. Active lifecycle. Available to order.","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":"30 ... 55 ms","at DC":"30 ... 55 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 60 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","Rated Value":"20 ... 33 V","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"AC/DC","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","Full-Scale Value":"1.1","at 230 V maximum":"100 1/h","at 240 V maximum":"100 1/h","at 400 V maximum":"80 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","Inrush Current Peak":"30 A","Product Designation":"capacitor contactors","at 50 Hz rated value":"20 ... 33 V","at 60 Hz rated value":"20 ... 33 V","Instantaneous Contact":"0","For Main Current Circuit":"screw-type terminals","Locked-Rotor Current Peak":"12 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"105 mA","Of Main Circuit Rated Value":"6 kV","Substance Prohibitance (Date)":"05/01/2014","For Grounded Parts At The Side":"10 mm","Duration Of Inrush Current Peak":"30 µs","Locked-Rotor Current Mean Value":"6.5 A","Duration Of Locked-Rotor Current":"230 ms","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"70 W","holding power of magnet coil at DC":"1.5 W","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":"2.5 VA","apparent pick-up power of magnet coil at AC":"110 VA","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"0","Type Of Voltage Of The Control Supply Voltage":"AC/DC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.95","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":"0.95","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":"https://cdn.aoctrl.com/47b3018740ed3b93c2c2f164c8cddb2e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=504017&mlfb=3RT2637-1NB35","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2637-1NB35/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT2637-1NB35?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."},{"question":"What is the depth of 3RT2637-1NB35?","answer":"The depth is 130 mm."},{"question":"What solid wire sizes does the 3RT2637-1NB35 accept?","answer":"Solid wire capacity: 2x (0.5-1.5 mm²), 2x (0.75-2.5 mm²), and 2x 4 mm²."},{"question":"What is the coil voltage rating for 3RT2637-1NB35?","answer":"The coil is rated 20-33 V AC/DC with screw-type terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2637-1NB35","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/3RT2637-1NB35 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}}