{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1016-2KB42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1016-2KB42","canonicalUrl":"https://aoctrl.com/siemens/3RT1016-2KB42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1016-2KB42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S00, 24 VDC coil, spring-loaded terminals, IP20 front, 45 mm width.","salesMarkdown":"The coil is rated 24 VDC, with a holding power of 2.3 W and closing power of 2.3 W — a DC coil means no AC hum and lower inrush compared to an equivalent AC coil, but verify your control transformer can supply the DC bus cleanly. Main power terminals are spring-loaded, accepting 2x (0.25 to 2.5 mm²) solid or stranded wire, or 2x (24 to 14 AWG). Spring-cage termination speeds up panel wiring and holds better under vibration than screw terminals, but requires the correct ferrule or stripped length. Rated operational current at AC-12 (resistive load) is 10 A maximum. For motor duty, the AC-3 rating at 400 V is 4.5 kW, and at 690 V it is 5.5 kW — these are the numbers that govern real motor switching, not the resistive maximum. If your application cycles the contactor under load, this is the rating to size against. The built-in varistor surge suppressor clamps coil voltage spikes on the DC coil. This is standard for SIRIUS contactors and means you do not need an external suppression diode across the coil — but verify polarity: the varistor is polarity-sensitive. This suits most industrial enclosures but not clean-room or sealed environments without derating. Front-side protection is IP20 — finger-safe but not sealed. No forced derating for side-by-side mounting is stated, but in a densely packed panel, check the thermal rise.","metaTitle":"Siemens 3RT1016-2KB42 SIRIUS Power Contactor, S00, 24 VDC","metaDescription":"Siemens SIRIUS 3RT1016-2KB42 power contactor, size S00, 24 VDC coil, spring-loaded terminals, IP20 front, current lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.7","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP20","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Full-scale value":"1.25","Size of contactor":"S00","Product brand name":"SIRIUS","Degree of pollution":"3","Product designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"4.5 kW","at 690 V rated value":"5.5 kW","Instantaneous Contact":"0","Side-by-side mounting":"Yes","For Main Current Circuit":"spring-loaded terminals","Single Or Multi-Stranded":"2x (0,25 ... 2,5 mm²)","at AC-2 at 400 V rated value":"4 kW","at AC-4 at 400 V rated value":"8.5 A","Design of the surge suppressor":"with varistor","Closing power of magnet coil at DC":"2.3 W","Holding power of magnet coil at DC":"2.3 W","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 20 A","at AWG conductors for main contacts":"2x (24 ... 14)","With Type Of Coordination 1 Required":"fuse gL/gG: 35 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"22 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"DC","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"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=145492&mlfb=3RT1016-2KB42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1016-2KB42/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"The coil is 24 VDC, 2.3 W holding. AC-3 motor rating is 4.5 kW at 400 V and 5.5 kW at 690 V. AC-4 (reversing/inching) rating is 8.5 A at 400 V. AC-12 resistive maximum is 10 A. The built-in varistor suppresses coil spikes."},{"question":"What is the mounting and wiring specification?","answer":"It snaps onto a 35 mm DIN rail per EN 50022. Width is 45 mm, depth 73 mm, height 60 mm. Main terminals accept 2x (0.25 to 2.5 mm²) solid or stranded, or 2x (24 to 14 AWG), spring-loaded. Side-by-side mounting is allowed with a 6 mm gap."},{"question":"Does this contactor include a surge suppressor?","answer":"Yes, it has a built-in varistor surge suppressor across the coil. No external suppression diode is needed, but observe polarity."},{"question":"What is the closest functional alternative to the 3RT1016-2KB42?","answer":"The 3RT1015-1BB42 is a smaller S00 contactor (AC-3 3 kW at 400 V) with a 24 VAC/DC coil and screw terminals. It will not drop into the same panel without checking the coil voltage type and terminal style — the 3RT1016-2KB42 uses a 24 VDC coil and spring-loaded terminals. If your panel is wired for screw terminals and an AC coil, the 3RT1015-1BB42 is a closer fit; if you need the DC coil and spring-clamp wiring, stick with the 3RT1016-2KB42."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1016-2KB42","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/3RT1016-2KB42 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}}