{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1AN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1AN20","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1AN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 3RT1023-1AN20, 45 mm width, screw-type terminals, AC-4 8.5 A at 400 V, 10 million mechanical cycles.","salesMarkdown":"The Siemens 3RT1023-1AN20 is a SIRIUS power contactor in the Size S0 frame, rated for AC-4 duty at 8.5 A at 400 V — that's the motor-reversing and plugging current, not the resistive-heater number. If you're switching a reversing motor or a jogging load, this is the rating that governs contact life. AC-2 at 400 V comes in at 4 kW, which covers wound-rotor or slip-ring motor starts. Main contacts accept 2x (1...2.5 mm²) solid or stranded, up to 2x 10 mm² max. Auxiliary contacts take 2x (0.5...1.5 mm²) up to 2x (0.75...4 mm²). AWG equivalents: main 2x (16...12), 2x (14...10), 1x 8; auxiliary 2x (20...16), 2x (18...14), 1x 12. No spring-cage option on this order code — if you need push-in wiring, look at the 3RT1023-1AP00 variant. Width 45 mm, height 85 mm, depth 91 mm. Side-by-side mounting allowed — no derating gap required for adjacent contactors in the same row. ## Coordination and short-circuit protection — don't guess the fuse These are the manufacturer's assignments — using a different fuse size or type voids the coordination claim and can cause welded contacts or arc flash in a fault. That's the no-load switching endurance; electrical life under AC-4 load will be lower — factor in the switching frequency and current when estimating replacement intervals for a jogging or reversing application. Storage temperature exceeds that range — the -25...+60 °C limit is for running, not shelf life. RoHS compliance date 01.07.2006, so it meets the EU RoHS cutoff. Front face rated IP20 (finger-safe), terminals rated IP00 (no protection). In a standard IP54 or IP65 panel, the terminal area is inside the enclosure — the IP00 rating just means the screw terminals themselves aren't sealed, which is normal for panel-mount contactors.","metaTitle":"Siemens 3RT1023-1AN20 SIRIUS Power Contactor, Size S0, 45 mm","metaDescription":"Siemens 3RT1023-1AN20 SIRIUS power contactor, Size S0, 45 mm width, screw terminals, AC-4 8.5 A at 400 V, DIN rail mount. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Size Of Contactor":"S0","Solid Or Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 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 50 Hz rated value":"220 V","at 500 V rated value":"4.5 kW","at 60 Hz rated value":"220 V","at 690 V rated value":"5.5 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"4 kW","at AC-4 at 400 V rated value":"8.5 A","Substance Prohibitance (Date)":"01.07.2006 00:00:00","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","reference code acc. to IEC 81346-2":"Q","With Type Of Coordination 1 Required":"fuse gL/gG: 63 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","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)","apparent holding power of magnet coil at AC":"8.4 V·A","apparent pick-up power of magnet coil at AC":"64 V·A","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","Inductive Power Factor With Closing Power Of The Coil":"0.72","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.24","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":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","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=527594&mlfb=3RT1023-1AN20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AN20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT1023-1AN20?","answer":"The 3RT1023-1AP00 is the closest variant — same Size S0 frame and AC-4 rating, but with spring-cage terminals instead of screw-type. It drops into the same DIN-rail footprint without rewiring the mounting, but the terminal type differs, so a panel built for screw terminals would need terminal adapter changes."},{"question":"What compliance documentation does 3RT1023-1AN20 carry?","answer":"RoHS compliant per the substance prohibition date of 01.07.2006. Reference code per IEC 81346-2 is Q. The SIRIUS series carries CE and UL/CSA approvals as standard for the product family."},{"question":"Where can I buy 3RT1023-1AN20 and how is it quoted?","answer":"Sourced to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers are published here, but a quote request will return both."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1AN20","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/3RT1023-1AN20 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}}