{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2016-2KB42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2016-2KB42","canonicalUrl":"https://aoctrl.com/siemens/3RT2016-2KB42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2016-2KB42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS coupling contactor, size S00, 3RT2016-2KB42, 24 VDC coil, 10 A rated current, spring-type terminals, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## Part identity and core ratings The Siemens SIRIUS 3RT2016-2KB42 is a coupling contactor in size S00, designed for switching loads in control panels where galvanic isolation or signal-level switching is required — not a power motor starter, but a relay-grade interface between a controller and a higher-current circuit. Provided the contactor is mounted on a 35 mm DIN rail per DIN EN 60715, with the specified clearances — 10 mm upwards and forwards, 6 mm at the sides — the thermal path holds the unit on the grid through the rated operating range of -25 to +60 °C. The magnet coil terminates via spring-type terminals, which accept solid or stranded conductors from 0.5 to 4 mm², and up to 2x (0.5 to 4 mm²) when doubling up. That spring-cage design eliminates the need for a screwdriver torque check during commissioning — push the ferrule in, it holds. The main contact wiring range follows the same cross-section, so a single wire gauge serves the whole contactor. Strip length is not listed here, but the standard for Siemens spring terminals on this frame is 10 mm; verify against the unit in hand before terminating. The depth is 73 mm, width 45 mm, height 70 mm — this is a compact S00 frame, so it leaves room for adjacent devices on the same DIN rail, provided you respect those side gaps for heat dissipation. ## Switching performance and endurance Electrical switching frequency depends on the duty category: at AC-1 (resistive loads) the maximum is 1,000 operations per hour; at AC-2 and AC-3 (motor starting, slip-ring motors) it drops to 750 ops/h; at AC-4 (plugging, inching) it is 250 ops/h. For a coupling contactor that sees frequent signal-level switching, the mechanical life is generous; the electrical life at 24 VDC and 10 A will be the limiting factor — derate if switching inductive loads like small solenoids.","metaTitle":"Siemens 3RT2016-2KB42 SIRIUS Coupling Contactor, 24 VDC Coil","metaDescription":"Siemens SIRIUS 3RT2016-2KB42 coupling contactor, size S00. 24 VDC coil, 10 A rated current. Spring-type terminals, DIN rail mount. Current lifecycle stage. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"0.5 ... 4 mm²","Width":"45 mm","at DC":"7 ... 20 ms","Height":"70 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"0.5 ... 4 mm²","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"24 V","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","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","For Main Contacts":"20 ... 12","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","Solid Or Stranded":"2x (0,5 ... 4 mm²)","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":"1 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.2 A","at 480 V rated value":"7.6 A","at 500 V rated value":"2 A","at 600 V rated value":"9 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 12","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"0.33 hp","at 200/208 V rated value":"2 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"5 hp","at 575/600 V rated value":"7.5 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":"0.9 W","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":"7.4 A","For Auxiliary And Control Circuit":"spring-loaded terminals","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":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 35A (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":"0.3 W","for AWG cables for auxiliary contacts":"2x (20 ... 12)","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 ... 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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"155 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"111 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"86 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"66 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"55 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 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"}},"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=399410&mlfb=3RT2016-2KB42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2016-2KB42/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT2016-2KB42 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is 3RT2016-2KB42's listed depth (73 mm) on this component line?","answer":"The depth is 73 mm, with a width of 45 mm and height of 70 mm. This is the S00 frame size, compact enough for dense DIN-rail layouts provided the specified clearances are maintained."},{"question":"What is 3RT2016-2KB42's listed solid (0.5... 4 mm²) on this component line?","answer":"The spring-type terminals accept solid or stranded conductors from 0.5 to 4 mm², and up to 2x (0.5 to 4 mm²) when doubling up."},{"question":"Will 3RT2016-2KB42 drop into a panel that was specified around 3RT2015-2SB41 without rewiring?","answer":"Both are S00 frame contactors with the same DIN-rail footprint and spring-type terminals, so mechanical fit is identical. However, the coil voltage and contact ratings differ — verify the 3RT2015-2SB41's coil voltage and current rating against the 3RT2016-2KB42's 24 VDC / 10 A before committing. No rewiring of the DIN rail or terminal blocks is needed, but the control circuit must match."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2016-2KB42","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/3RT2016-2KB42 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}}