{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1016-2BG42","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1016-2BG42","canonicalUrl":"https://aoctrl.com/siemens/3RT1016-2BG42","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1016-2BG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1016-2BG42, power contactor, size S00, 4 kW AC-2 at 400 V, spring-loaded terminals, IP20 front, 45 mm width.","salesMarkdown":"The Siemens 3RT1016-2BG42 is a SIRIUS power contactor in the compact S00 frame, rated 4 kW in AC-2 duty at 400 V — meaning it handles moderate motor loads like conveyors or pumps where the switching frequency isn't extreme but the inrush needs controlled make-and-break. AC-2 covers slip-ring motor starting and plugging duty, so this contactor is sized for applications where the load current stays within the rated motor power curve, not just resistive heating. The S00 frame is Siemens' smallest contactor chassis, 45 mm wide, 60 mm tall, and 73 mm deep — a tight footprint that stacks well on a 35 mm DIN rail per EN 50022. Main power circuit connections use spring-loaded terminals, 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 compared to screw clamps — no torque driver needed, just strip 8–10 mm and push in. The IP20 finger-safe protection on the front and terminals means the contactor can sit exposed in a control cabinet without additional shrouding for routine touch-safety. ## Ratings and load handling Beyond the AC-2 motor rating, this contactor carries an AC-4 rating of 8.5 A at 400 V — that's the reversing and inching duty cycle, where the contactor makes and breaks stalled rotor current. AC-4 is the tougher thermal test; the 8.5 A figure tells you the contactor can handle frequent reversals on a motor up to roughly 4 kW, but the thermal capacity is set by the AC-4 current, not the motor nameplate. For AC-12 resistive loads, the maximum operating current is 10 A. Motor power ratings extend to 4.5 kW at 500 V and 5.5 kW at 690 V, so the contactor covers 400 V to 690 V line supplies without derating the motor power — useful on 690 V mining or industrial networks. The coil is a DC-operated type with 3.3 W closing and holding power, meaning the coil driver sees a constant DC load with no AC hum. ## Installation environment and protection The mechanical endurance is 30 million switching cycles, which outlasts most electrical life ratings; the actual service life will be limited by the load current and switching frequency. ## Short-circuit coordination For Type 1 coordination, a gL/gG fuse rated 35 A clears a fault without destroying the contactor; for Type 2 coordination, a 20 A fuse limits damage to the contactor so it remains functional after a short circuit. This matters when designing a motor branch circuit to IEC 60947-4-1 — the fuse size determines the let-through energy the contactor must survive.","metaTitle":"Siemens 3RT1016-2BG42 SIRIUS power contactor, S00, 4 kW AC-2","metaDescription":"Siemens SIRIUS 3RT1016-2BG42 power contactor, size S00, 4 kW AC-2 at 400 V, spring-loaded terminals, IP20 front, current lifecycle stage. Sourced to order via RFQ.","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":"125 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","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=247198&mlfb=3RT1016-2BG42","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1016-2BG42/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of this contactor?","answer":"The depth is 73 mm, which fits standard 100 mm deep enclosures with room for wiring clearance."},{"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, or 2x (24 to 14 AWG)."},{"question":"What short-circuit protection is required?","answer":"For Type 2 coordination, use a gL/gG fuse rated 20 A; for Type 1 coordination, a 35 A fuse is required."},{"question":"What is the AC-4 current rating?","answer":"The AC-4 rating at 400 V is 8.5 A — this governs the reversing and inching duty capability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1016-2BG42","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/3RT1016-2BG42 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}}