{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2017-4KB42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2017-4KB42","canonicalUrl":"https://aoctrl.com/siemens/3RT2017-4KB42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2017-4KB42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, coupling contactor, size S00, 24 V DC coil, ring cable lug connection, screw and snap-on mounting onto 35 mm DIN rail, 73 mm depth, 45 mm width.","salesMarkdown":"## SIRIUS 3RT2017-4KB42 — Coupling Contactor for DC Load Circuits It mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715, fitting a 45 mm wide x 58 mm tall x 73 mm deep footprint — standard for the S00 block contactor family. Its DC switching capability is defined across multiple voltage levels: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.2 A at 440 V, 11 A at 480 V, 2 A at 500 V, and 11 A at 600 V. These ratings dictate the maximum resistive DC load the contactor can break — critical for sizing in battery-backed or rectified DC bus circuits where the arcing time (10–15 ms) and DC switching time (7–20 ms) govern contact life. The coil picks up at 70% of rated voltage (16.8 V for the 24 V coil) and holds across the full operating range of -25 °C to +60 °C ambient, with storage from -55 °C to +80 °C. Maximum switching frequency varies by duty: 1000 cycles/hour at AC-1 (resistive), 750 cycles/hour at AC-2 and AC-3 (motor starting/running), and 250 cycles/hour at AC-4 (plugging/inching) — the AC-4 limit governs the most demanding reversing or jogging applications. ## Mounting and Clearance Requirements","metaTitle":"Siemens SIRIUS 3RT2017-4KB42 Coupling Contactor, 24 VDC Coil","metaDescription":"Siemens SIRIUS 3RT2017-4KB42 coupling contactor, size S00, 24 VDC coil. Switches 10 A at 24 VDC. Screw and snap-on mounting for 35 mm DIN rail. Current lifecycle stage. Sourced to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at DC":"7 ... 20 ms","title":"3RT2017-4KB42","Height":"58 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","description":"power contactor, AC-3e/AC-3, 12 A, 5.5 kW / 400 V, 3-pole, 24 V DC, 0.7-1.25* Us, with integrated suppressor diode, auxiliary contacts: 1 NC, ring cable lug connection, size: S00, suitable for PLC outputs, not expandable with auxiliary switch","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Ring cable lug connection","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 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":"1.25","at AC-3e maximum":"750 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":"S00","Product Brand Name":"SIRIUS","Product Designation":"Coupling 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":"30 000 000","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":"2 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.2 A","at 480 V rated value":"11 A","at 500 V rated value":"2 A","at 600 V rated value":"11 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"Ring cable lug connection","at 110/120 V rated value":"0.5 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"7.5 hp","at 575/600 V rated value":"10 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":"1.5 W","at AC-2 at 400 V rated value":"5.5 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"8.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"suppressor diode","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"19.4 A","at AC-5b up to 400 V rated value":"9.9 A","For Auxiliary And Control Circuit":"ring terminal lug connection","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 20A (690V,100kA), aM: 16A (690V, 100kA), BS88: 20A (415V, 80kA)","Without Load Current Share Typical":"2.8 W","closing power of magnet coil at DC":"2.8 W","holding power of magnet coil at DC":"2.8 W","At Contactor For Auxiliary Contacts":"Ring cable lug connection","With Type Of Coordination 1 Required":"gG: 50A (690V,100kA), aM: 20A (690V,100kA), BS88: 35A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"0.5 W","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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":"DC","Limited To 1 S Switching At Zero Current Maximum":"200 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"123 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"96 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"74 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"61 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":"4 mm²","number of NC 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/56648153111a85ad2d623129b10cb1ec.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=500669&mlfb=3RT2017-4KB42"},"ai":{"faq":[{"question":"How do I get pricing and availability for the 3RT2017-4KB42?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"Will the 3RT2017-4KB42 drop into a panel specified around the 3RT2015-4BB42 without rewiring?","answer":"Both are size S00 contactors sharing the same 45 mm width, 58 mm height, 73 mm depth, and DIN-rail mounting footprint. Panel cutouts and bus-bar spacing are identical, so a direct mechanical swap is possible. However, the 3RT2017-4KB42 carries a 24 V DC coil (versus the 3RT2015-4BB42's coil voltage — verify your control voltage), and its DC switching ratings differ. Confirm the load-side DC voltage and current against the ratings table before substitution."},{"question":"What compliance documentation does Siemens provide for the 3RT2017-4KB42?","answer":"As a SIRIUS catalog product, Siemens typically provides declarations of conformity for IEC/EN 60947-4-1, UL/CSA listings, RoHS and REACH compliance declarations, and material declarations. The specific documentation set should be requested at order time to support panel certification and GMP validation packages."},{"question":"What are the key dimensional specs for the 3RT2017-4KB42?","answer":"Width 45 mm, height 58 mm, depth 73 mm. Minimum clearance to adjacent components: 10 mm upwards, 10 mm forwards, 10 mm downwards, 6 mm at the sides."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2017-4KB42","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/3RT2017-4KB42 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}}