{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2038-1NB34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2038-1NB34","canonicalUrl":"https://aoctrl.com/siemens/3RT2038-1NB34","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2038-1NB34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 3RT2038-1NB34, 20-33 VAC/DC coil, screw-type terminals, 55 mm width, 174 mm depth, 114 mm height, current lifecycle stage.","salesMarkdown":"## Siemens 3RT2038-1NB34 — SIRIUS Size S2 Power Contactor The coil accepts 20-33 VAC/DC, with a pick-up threshold at 0.8x rated and drop-out at 1.1x full-scale value — meaning it holds in reliably down to about 16 V and releases cleanly above 36 V. Main contacts are configured as 3-pole normally open (3 NO), rated for AC-1, AC-2, AC-3, and AC-4 duty cycles. At AC-3 (motor switching), the maximum operating rate is 500 cycles per hour; at AC-4 (inching/jogging), it drops to 150 cycles per hour due to higher arc stress. These spacings ensure adequate arc-quenching and heat dissipation in a crowded panel. Coil terminals are screw-type, accepting 2x 0.5 to 2.5 mm² solid or stranded wire. At 24 V rated value, holding current is 6 A; at 48 V it drops to 2 A, and at 220 V to 0.3 A. These timing figures matter for coordination with upstream short-circuit protection devices — the arc must clear before the breaker's magnetic trip reacts. The SIRIUS series typically carries UL, CSA, and CE certifications (confirm specific marks with the factory datasheet). RoHS and REACH compliance documentation is available from the manufacturer.","metaTitle":"Siemens 3RT2038-1NB34 SIRIUS Power Contactor, Size S2, 20-33","metaDescription":"Siemens 3RT2038-1NB34 SIRIUS power contactor, size S2, 20-33 VAC/DC coil, 55 mm wide, screw terminals. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"174 mm","Width":"55 mm","at AC":"30 ... 55 ms","at DC":"30 ... 55 ms","Height":"114 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"2 VA","at 60 Hz":"2 VA","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"6 mm","Rated Value":"20 ... 33 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"700 1/h","at AC-2 maximum":"350 1/h","at AC-3 maximum":"500 1/h","at AC-4 maximum":"150 1/h","lifecycle_stage":"current","Auxiliary Switch":"No","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","Full-Scale Value":"1.1","at AC-3e maximum":"500 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","Inrush Current Peak":"3 A","Product Designation":"Power contactor","at 24 V rated value":"6 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":"15 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":"20 ... 33 V","at 500 V rated value":"2 A","at 60 Hz rated value":"20 ... 33 V","at 600 V rated value":"62 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":"25 hp","at 460/480 V rated value":"50 hp","at 575/600 V rated value":"60 hp","Locked-Rotor Current Peak":"2.6 A","Relative Humidity Minimum":"10 %","Holding Current Mean Value":"40 mA","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"17.1 W","at AC-2 at 400 V rated value":"37 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","Design Of The Surge Suppressor":"with varistor","Duration Of Inrush Current Peak":"50 µs","Locked-Rotor Current Mean Value":"1 A","Duration Of Locked-Rotor Current":"230 ms","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"79.2 A","at AC-5b up to 400 V rated value":"66.4 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 160A (690V,100kA), aM: 80A (690V,100kA), BS88: 125A (415V,80kA)","Without Load Current Share Typical":"2 W","closing power of magnet coil at DC":"23 W","holding power of magnet coil at DC":"1 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":"5.7 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/DC","Limited To 1 S Switching At Zero Current Maximum":"1 298 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"898 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"640 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"414 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"333 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / Q600","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":"35 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","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/82994938958c8f5134c1759308d832af.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=157338&mlfb=3RT2038-1NB34","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2038-1NB34/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of 3RT2038-1NB34?","answer":"Width is 55 mm, depth is 174 mm, height is 114 mm. Minimum clearances: 10 mm upwards, forwards, and downwards; 6 mm to the side."},{"question":"What is the coil voltage range for 3RT2038-1NB34?","answer":"Rated control voltage is 20-33 VAC/DC. Pick-up occurs at 0.8x rated (about 16 V), drop-out at 1.1x full-scale (about 36 V). Inrush current peaks at 3 A; sealing power is 2 VA at 50/60 Hz."},{"question":"How do I get current pricing and availability for 3RT2038-1NB34?","answer":"Submit an RFQ through this listing. The part is sourced to order via independent distribution; current pricing and lead time are confirmed at quote time based on your quantity and delivery location."},{"question":"Does 3RT2038-1NB34 include an auxiliary contact block?","answer":"No. The contactor ships without auxiliary switches. If you need auxiliary contacts, order a separate add-on block (e.g., Siemens 3RT19 series) and wire it externally."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2038-1NB34","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/3RT2038-1NB34 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}}