{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-1KJ84-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-1KJ84-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-1KJ84-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1KJ84-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S2, 3RT1035-1KJ84-0LA0, 72 V DC coil, screw-type terminals, 35 A AC-4 at 400 V, current production.","salesMarkdown":"It is a current-production part, meaning it is still in active manufacture and available through authorized distribution channels. The 72 V DC coil is the key selection parameter here: this contactor pulls in on a 72 V DC control voltage, with a rated operating current of 10 A at 24 V and 2 A at 60 V. The DC coil means it is suited for systems with a DC control bus, common in some process plants and renewable energy installations. For motor switching, the AC-3 rating at 500 V is 22 kW, and at 690 V it is 11.4 kW. A 35 A AC-4 rating means it can handle the high electrical wear of frequent jogging or plugging without premature contact welding. Side-by-side mounting is permitted, which saves panel width when ganging multiple contactors for multi-speed or reversing starters. ## Terminal specs and wiring Main current circuit terminals are screw-type, accepting solid conductors from 2x (0.5... 1.5 mm²) up to max. 2x (0.75... 4 mm²), and stranded conductors from 2x (0.75... 25 mm²). At 40 °C, the minimum permissible conductor size is 16 mm² — this is the thermal derating floor, not a wiring convenience; if you land a smaller wire than 16 mm² at full rated current, the terminal temperature rise may exceed limits. The solid or stranded terminal range is listed as 2x (0.75... 16 mm²), which covers the majority of panel wiring for this frame size. The IP00 rating on the front and terminals means it is not protected against dust or water ingress — it must be installed inside a suitable enclosure. The substance prohibition date of 05/01/2012 indicates RoHS compliance (the date after which the part was manufactured to comply with the RoHS directive). Electrical life depends on switching duty and current. ## Switching frequency and timing Maximum switching frequency at AC-1 is 1,200 ops/h; at AC-3 it is 1,000 ops/h; at AC-4 it is 300 ops/h.","metaTitle":"Siemens SIRIUS 3RT1035-1KJ84-0LA0 power contactor, S2, 72 V","metaDescription":"Siemens SIRIUS 3RT1035-1KJ84-0LA0 power contactor, size S2. 72 V DC coil, 35 A AC-4 at 400 V. Current production. Screw terminals, DIN rail mount. RoHS compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"179 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"55 mm","at DC":"20 ... 25 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"72 V","On The Front":"IP00","Initial Value":"0.7","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"1 200 1/h","at AC-2 maximum":"600 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.25","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.75 ... 16 mm²)","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":"10 000 000","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":"22 kW","at 690 V rated value":"11.4 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"18.5 kW","at AC-4 at 400 V rated value":"35 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"16 mm²","at 60 °C minimum permissible":"16 mm²","Design Of The Surge Suppressor":"with varistor","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"22 kW","at 690 V at 60 °C rated value":"66 kW","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 63 A","closing power of magnet coil at DC":"13.3 W","holding power of magnet coil at DC":"13.3 W","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 125 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"400 A","Finely Stranded Without Core End Processing":"2x (0.75 ... 16 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"2","Of The Contactor With Added Electronically Optimized 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=374276&mlfb=3RT1035-1KJ84-0LA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1KJ84-0LA0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-1KJ84-0LA0","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/3RT1035-1KJ84-0LA0 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}}