{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1024-3BB40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1024-3BB40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT1024-3BB40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1024-3BB40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1024-3BB40-ZX95 power contactor, size S0, 3-pole normally open main contacts, 24 V DC coil, screw-type terminals, 5.5 kW rated motor power at 400 V AC-3.","salesMarkdown":"It is designed for switching motor loads in control panels and industrial machinery, rated for 5.5 kW at 400 V in AC-3 duty and 12.5 A in AC-4 duty at the same voltage. Front-side protection is IP20, meaning the contactor is touch-safe from the front once installed in an enclosure. The terminal area itself is rated IP00, so the wiring compartment requires the panel door or additional guarding to meet IP2X requirements. Main current circuit terminals are screw-type, accepting solid or stranded conductors: 2x (0.25 to 2.5 mm²), 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or a single conductor up to 10 mm². AWG equivalents are 2x (16 to 12), 2x (14 to 10), and 1x 8. This range covers most motor and feeder wiring in control panels. The auxiliary contact block (not included) can be added on the side; the contactor has no built-in auxiliary contacts. For short-circuit protection, the required fuse size depends on coordination type: 25 A gL/gG for Type 2 coordination, 63 A gL/gG for Type 1. ## Sourcing posture This is a current-production Siemens SIRIUS contactor. For BOM-line commitment, the key fit parameters are the S0 frame size, 24 V DC coil, 3-pole NO main contacts, and screw terminals. The AC-3 motor rating at 400 V (5.5 kW) and AC-4 current (12.5 A) define the load it can switch.","metaTitle":"Siemens 3RT1024-3BB40-ZX95 SIRIUS Power Contactor, S0, 24 VD","metaDescription":"Siemens SIRIUS 3RT1024-3BB40-ZX95 power contactor, size S0, 3-pole NO, 24 VDC coil, 5.5 kW at 400 V AC-3. Active production, screw terminals, DIN rail mount. Source to order via RF","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"100 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"85 mm","At The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","Mounting Type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Full-Scale Value":"1.1","Size Of Contactor":"S0","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 400 V rated value":"5.5 kW","at 500 V rated value":"7.5 kW","at 690 V rated value":"7.5 kW","Instantaneous Contact":"0","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"5.5 kW","at AC-4 at 400 V rated value":"12.5 A","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","closing power of magnet coil at DC":"5.4 W","holding power of magnet coil at DC":"5.4 W","operating current at AC-12 maximum":"10 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 63 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","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":"40 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","operating current at AC-15 at 230 V rated value":"6 A","operating current at AC-15 at 400 V rated value":"3 A","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","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000","type of connectable conductor cross-sections at AWG conductors for auxiliary contacts":"2x (24 ... 14)"}},"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=426182&mlfb=3RT1024-3BB40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1024-3BB40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 3RT1024-3BB40-ZX95?","answer":"The 3RT1023-1AL20 is a close peer in the SIRIUS family, but it uses a different coil voltage and frame size. Verify coil voltage and frame dimensions before substituting — the 3RT1024-3BB40-ZX95 uses a 24 V DC coil in an S0 frame, while the 3RT1023-1AL20 may differ in both. No direct drop-in replacement without checking those parameters."},{"question":"What is the depth of the 3RT1024-3BB40-ZX95?","answer":"The depth is 100 mm, measured from the mounting rail surface to the front of the contactor."},{"question":"What wire sizes does the 3RT1024-3BB40-ZX95 accept?","answer":"The screw terminals accept solid conductors from 2x (0.25 to 2.5 mm²) up to a single 10 mm², or AWG equivalents from 2x (16 to 12) up to 1x 8 AWG."},{"question":"Will the 3RT1024-3BB40-ZX95 drop into a panel specified for the 3RT1023-1AL20?","answer":"Not without checking the coil voltage and frame size. The 3RT1024-3BB40-ZX95 uses a 24 V DC coil in an S0 frame; the 3RT1023-1AL20 may have a different coil voltage and possibly a different frame size. Verify those two parameters before assuming mechanical fit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1024-3BB40-ZX95","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/3RT1024-3BB40-ZX95 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}}