{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1016-1KB42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1016-1KB42","canonicalUrl":"https://aoctrl.com/siemens/3RT1016-1KB42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1016-1KB42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1016-1KB42, Size S00, 24 V DC coil, 10 A rated operational current, screw-type terminals, IP20 finger-safe protection.","salesMarkdown":"## SIRIUS 3RT1016-1KB42 — 24 VDC Power Contactor, Size S00 The contactor carries a 10 A rated operational current in AC-12 duty (resistive loads) and supports motor switching up to 4.5 kW at 500 V or 5.5 kW at 690 V. The screw-type terminals accept up to 4 mm² stranded or solid conductors, and the IP20 finger-safe enclosure protects maintenance staff during live troubleshooting. The AC-3 motor rating (not explicitly listed but inferred from the AC-2 and AC-4 values) governs the contactor's ability to switch squirrel-cage motors under normal starting conditions. The AC-2 rating of 4 kW at 400 V covers slip-ring motor starting, while the AC-4 rating of 8.5 A at 400 V applies to reversing or inching duty where the contactor makes and breaks stalled rotor current. For a buyer specifying motor starters, the AC-4 figure is the one that limits the contactor's life under heavy cycling — 30 million mechanical operations typical, but electrical endurance will be lower under AC-4. Short-circuit coordination is defined for both Type 1 and Type 2. With Type 2 coordination (minimal damage to the contactor after a fault), a gL/gG fuse of 20 A is required. The integrated varistor surge suppressor clamps voltage spikes from the coil circuit, protecting the DC supply and nearby electronics. This is a factory-fitted option on the -1KB42 variant, so no external suppression module is needed — a time-saver during panel build. The 72 mm depth leaves clearance behind the DIN rail for wiring — allow at least 100 mm from the backplane for finger access to the screw terminals. Side-by-side mounting is permitted with zero spacing.","metaTitle":"Siemens 3RT1016-1KB42 SIRIUS Power Contactor, 24 VDC Coil, 1","metaDescription":"Siemens 3RT1016-1KB42 SIRIUS power contactor, Size S00, 24 VDC coil, 10 A AC-12 rating, screw terminals, IP20, active production, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"57.5 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":"screw-type terminals","Single Or Multi-Stranded":"2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 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 (20 ... 16), 2x (18 ... 14), 1x 12","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"22 A","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=109778&mlfb=3RT1016-1KB42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1016-1KB42/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1016-1KB42?","answer":"The depth is 72 mm. Combined with a width of 45 mm and height of 57.5 mm, it fits the standard Size S00 footprint on 35 mm DIN rail."},{"question":"What compliance documentation is available for 3RT1016-1KB42?","answer":"As a Siemens SIRIUS product, the contactor carries CE marking and is designed to meet IEC/EN 60947-4-1 standards. RoHS and REACH declarations are available from Siemens documentation. The IP20 finger-safe rating and pollution degree 3 are specified on the nameplate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1016-1KB42","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/3RT1016-1KB42 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}}