{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2024-1BB44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2024-1BB44","canonicalUrl":"https://aoctrl.com/siemens/3RT2024-1BB44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2024-1BB44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2024-1BB44 power contactor, S0 frame size, 24 V DC coil, screw-type terminals, 45 mm width, DIN EN 60715 rail mount.","salesMarkdown":"## SIRIUS S0 Contactor with 24 V DC Coil The Siemens 3RT2024-1BB44 is a SIRIUS-branded power contactor in the S0 frame size, designed for switching motor loads and resistive loads in industrial control panels. It carries a 24 V DC coil with screw-type terminals, and mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715 — the standard panel integration for this class. Rated for 1,000 switching cycles per hour in AC-1, AC-2, and AC-3 duty, and 300 cycles per hour in AC-4 duty — the AC-4 ceiling matters for plugging or inching applications where the contactor makes and breaks under load more frequently. ## Mounting and Clearance Constraints Dimensions are 85 mm height, 45 mm width, and 151 mm depth — the 45 mm width fits a standard 2-module DIN-rail footprint, so it occupies two 22.5 mm slots in the enclosure. Minimum clearance around the contactor: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the sides — these spacings must be maintained for heat dissipation and arc quenching. Mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/-22.5°, giving flexibility in tight cabinets where the contactor must sit at an angle. ## Wiring and Connection Details Main contact terminals accept solid or stranded wire from 1 to 10 mm², and auxiliary contact terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) — the dual-wire entry is useful for daisy-chaining control signals without a separate terminal block. The coil connection uses screw-type terminals — no push-in or spring-cage option on this variant, so expect a screwdriver for termination. Arcing time is 10 to 10 ms — a tight window that limits contact erosion during break, relevant for applications with frequent switching near the rated current. ## Environmental and Lifecycle Status Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C — the wide storage range means it can sit in an unheated warehouse or on a truck in winter without issue. Mechanical service life is 10 million operations typical — this is the contactor body itself, not the contacts under load; electrical life depends on the switching duty and load current.","metaTitle":"Siemens 3RT2024-1BB44 SIRIUS Contactor, 24 V Coil, S0 Size","metaDescription":"Siemens 3RT2024-1BB44 SIRIUS power contactor, 24 V DC coil, S0 frame size, screw terminals, DIN rail mount. Current production status. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"151 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at DC":"15 ... 18 ms","title":"3RT2024-1BB44","Height":"85 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"1 ... 10 mm²","Downwards":"10 mm","Arcing Time":"10 ... 10 ms","At The Side":"6 mm","Rated Value":"24 V","description":"power contactor, AC-3e/AC-3, 12 A, 5.5 kW / 400 V, 3-pole, 24 V DC, auxiliary contacts: 2 NO + 2 NC, screw terminal, size: S0, removable auxiliary switch","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"1 000 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","Auxiliary Switch":"No","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","Full-Scale Value":"1.1","at AC-3e maximum":"1 000 1/h","For Main Contacts":"16 ... 8","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"6 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"2 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"11 A","at 500 V rated value":"2 A","at 600 V rated value":"11 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"1 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"7.5 hp","at 575/600 V rated value":"10 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"0.9 W","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"12.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"35.2 A","at AC-5b up to 400 V rated value":"9.9 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)","Without Load Current Share Typical":"5.9 W","closing power of magnet coil at DC":"5.9 W","holding power of magnet coil at DC":"5.9 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"0.3 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"DC","Limited To 1 S Switching At Zero Current Maximum":"210 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"210 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"170 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"126 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"105 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / Q600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"10 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"2","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":"$49.53","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3b457451b39fddf8ce776806d38ffa9c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=326042&mlfb=3RT2024-1BB44"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2024-1BB44","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/3RT2024-1BB44 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}