{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1016-1KJ81","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1016-1KJ81","canonicalUrl":"https://aoctrl.com/siemens/3RT1016-1KJ81","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1016-1KJ81","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1016-1KJ81, size S00 power contactor, 72 V DC coil, screw terminals, 5.5 kW at 690 V AC-3, snap-on 35 mm DIN rail.","salesMarkdown":"The Siemens 3RT1016-1KJ81 is a SIRIUS size S00 power contactor with a 72 V DC coil, rated for motor switching up to 5.5 kW at 690 V AC-3. The AC-3 motor rating of 5.5 kW at 690 V tells you this contactor can switch a 5.5 kW induction motor on a 690 V line — that's the real-world load it's designed for, not just a resistive bench number. At 400 V AC-3, it's rated 4.5 kW; at 500 V, still 4.5 kW. Coil is 72 V DC with a closing and holding power of 2.3 W — a constant-hold DC coil that doesn't hum and runs cool. The built-in varistor surge suppressor means you don't need to add an external snubber across the coil for DC switching. Type 2 coordination (no-weld) requires a 20 A gL/gG fuse upstream; Type 1 (weld-allowed) can use a 35 A fuse. That's the short-circuit protection the contactor expects to survive a fault without welding its main contacts. The S00 frame is compact at 45 mm wide, 57.5 mm tall, and 72 mm deep — fits a standard 8-module enclosure row with room for a motor starter or auxiliary contact block alongside. Screw terminals on the main circuit accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid/stranded — covers standard control wiring up to 4 mm² for the power path. AWG equivalents: 2x (20 to 16), 2x (18 to 14), 1x 12.","metaTitle":"Siemens 3RT1016-1KJ81 SIRIUS Power Contactor, 72 V Coil, 5.5","metaDescription":"Siemens SIRIUS 3RT1016-1KJ81 power contactor, size S00, 72 V DC coil, rated 5.5 kW at 690 V AC-3. Active production, screw terminals, snap-on DIN rail. Sourced 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":"72 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":"1","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=161886&mlfb=3RT1016-1KJ81","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1016-1KJ81/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT1016-1KJ81?","answer":"The 3RT1015-1BB42 is a smaller S00 contactor with a 24 V DC coil and lower motor ratings (3 kW at 400 V AC-3). It shares the same footprint and terminal layout, so it drops into the same DIN-rail slot without rewiring, but you lose the 72 V coil and the higher power capacity. For a direct 72 V DC coil replacement, stick with the 3RT1016-1KJ81."},{"question":"What is the depth of this contactor?","answer":"72 mm deep, measured from the DIN-rail mounting surface to the front of the housing."},{"question":"What wire sizes does the main circuit terminal accept?","answer":"Screw terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid or stranded. AWG equivalents: 2x (20 to 16), 2x (18 to 14), 1x 12."},{"question":"Will 3RT1016-1KJ81 fit a panel specified for 3RT1015-1BB42?","answer":"Yes — both are size S00 with the same 45 mm width, 57.5 mm height, 72 mm depth, and snap-on 35 mm DIN-rail mounting. The terminal layout and screw-type terminals are identical, so it's a drop-in without rewiring. The only difference is the coil voltage (72 V DC vs 24 V DC) and the higher motor ratings on the 3RT1016-1KJ81."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1016-1KJ81","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/3RT1016-1KJ81 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}}