{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1016-2UB42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1016-2UB42","canonicalUrl":"https://aoctrl.com/siemens/3RT1016-2UB42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1016-2UB42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1016-2UB42 power contactor, size S00, 24 VDC coil, spring-loaded terminals, AC-2 4 kW at 400 V, integrated varistor surge suppression.","salesMarkdown":"## SIRIUS S00 Power Contactor, 24 VDC Coil The Siemens 3RT1016-2UB42 is a SIRIUS-branded power contactor in the S00 frame size, designed for switching motor loads and resistive loads in control panels. It mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, making it a direct fit for standard industrial enclosures. The coil is rated 24 VDC with a holding power of 3.3 W, and the main circuit uses spring-loaded terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded wire. The integrated varistor surge suppressor eliminates the need for an external coil snubber in most applications. For motor duty, it is rated 4 kW at 400 V in AC-2 (slip-ring motor starting) and 8.5 A at 400 V in AC-4 (plugging/reversing). For resistive loads (AC-12), it handles up to 10 A. These ratings define the real-world switching capability — the AC-4 figure is the one to watch for frequent reversing or inching applications. ## Coordination and Protection Type 1 coordination requires a 35 A gL/gG fuse; Type 2 coordination (no damage to the contactor under short circuit) needs a 20 A gL/gG fuse. The pollution degree 3 rating means it is suited for industrial environments with conductive pollution, and the IP20 front protection keeps fingers out of live terminals.","metaTitle":"Siemens 3RT1016-2UB42 SIRIUS Contactor S00, 24 VDC, Spring-C","metaDescription":"Siemens SIRIUS 3RT1016-2UB42 power contactor, size S00, 24 VDC coil, spring-loaded terminals, AC-2 4 kW at 400 V. Active production. 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":"0.85","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":"1.1","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":"3.3 W","Holding power of magnet coil at DC":"3.3 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","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"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=145332&mlfb=3RT1016-2UB42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1016-2UB42/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"For AC-2 duty at 400 V it is rated 4 kW; for AC-4 duty at 400 V it is rated 8.5 A. The AC-12 resistive load rating is 10 A maximum."},{"question":"What wire sizes does the spring-loaded terminal accept?","answer":"The main circuit terminals accept 2x (0.25 to 2.5 mm²) solid or stranded conductors, or 2x (24 to 14 AWG)."},{"question":"Does this contactor have a built-in surge suppressor?","answer":"Yes, it includes a varistor-type surge suppressor integrated into the coil circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1016-2UB42","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/3RT1016-2UB42 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}}