{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2025-2DB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2025-2DB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2025-2DB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2025-2DB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Power contactor, S0 size, 24 VDC coil, spring-type terminals, 3 hp at 230 V, 45 mm width, 154 mm depth.","salesMarkdown":"The 24 VDC coil picks up at 80% of rated voltage (19.2 V) and drops out at 110% (26.4 V), so it holds through a sag but releases cleanly on a brownout. Rated for 3 hp at 230 V motor duty — that's the AC-3 rating that governs real motor switching, not the higher AC-1 resistive current. DC load switching is specified per voltage: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V — these are the numbers that matter for a DC bus or battery circuit, not the AC motor rating. Mechanical life is 10 million cycles typical; electrical life depends on the load, but the contactor is rated for 1000 operations per hour under AC-1, AC-2, AC-3, and AC-3e duty, and 300 ops/h under the heavier AC-4 plugging/reversing duty. ## Panel fit and wiring — S0 frame, spring terminals, clearances The S0 contactor measures 45 mm wide, 102 mm high, and 154 mm deep — a standard footprint that fits alongside other SIRIUS S0 gear on a 35 mm DIN rail per DIN EN 60715, using either screw-fixed or snap-on mounting. Spring-type terminals accept solid or stranded copper from 1 to 10 mm² on the main contacts, and 2 × (0.5 to 2.5 mm²) fine-stranded with ferrules on the coil terminals — no screw tightening, which speeds panel wiring. Clearance requirements: 10 mm upwards, 10 mm downwards, 10 mm forwards, and 6 mm at the sides — tight enough for dense DIN-rail layouts, but the 154 mm depth means the contactor projects well into the enclosure, so leave enough door clearance. ## Lifecycle and sourcing — current production, no auxiliary contacts Note that this variant ships without an auxiliary switch block (auxiliary switch: no), so if your circuit needs a feedback contact or a status signal to a PLC, you'll need to order a separate auxiliary contact block that clips onto the S0 contactor.","metaTitle":"Siemens 3RT2025-2DB44-3MA0 SIRIUS Power Contactor, S0, 24 VD","metaDescription":"Siemens SIRIUS 3RT2025-2DB44-3MA0 power contactor, S0 size, 24 VDC coil, spring terminals, 3 hp at 230 V. Current lifecycle stage, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"154 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at DC":"15 ... 17.5 ms","title":"3RT2025-2DB44-3MA0","Height":"102 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, 17 A, 7.5 kW / 400 V, 3-pole, 24 V DC, with plugged-in varistor, auxiliary contacts: 2 NO + 2 NC, spring-loaded terminal, size: S0, captive auxiliary switch","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-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 standard mounting rail according to DIN EN 60715","Full-Scale Value":"1.1","at AC-3e maximum":"1 000 1/h","For Main Contacts":"18 ... 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 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"10 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":"3 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"14 A","at 500 V rated value":"2 A","at 600 V rated value":"17 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"1 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 hp","at 575/600 V rated value":"15 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":"1.8 W","at AC-2 at 400 V rated value":"7.5 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"15.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Design Of The Surge Suppressor":"with varistor","at AWG cables for main contacts":"2x (18 ... 8)","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":"14.1 A","For Auxiliary And Control Circuit":"spring-loaded 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":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)","at AWG cables for auxiliary contacts":"2x (20 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"0.6 W","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)","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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"225 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"225 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"180 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"115 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"96 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":"$63.50","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b48bf32acb64b237460b8b7baf970aa9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=575588&mlfb=3RT2025-2DB44-3MA0"},"ai":{"faq":[{"question":"Where can I buy 3RT2025-2DB44-3MA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"Will 3RT2025-2DB44-3MA0 drop into a panel specified around 3RT2015-2BB44-3MA0 without rewiring?","answer":"Both are SIRIUS S0-frame contactors with the same 45 mm width, 102 mm height, and DIN-rail mounting, so the physical footprint is identical — but the coil voltage and terminal type differ, so check the coil rating and whether your wiring matches spring terminals before assuming a drop-in swap."},{"question":"What is the listed depth of 3RT2025-2DB44-3MA0?","answer":"The depth is 154 mm, which is the dimension from the DIN-rail mounting base to the front of the contactor body."},{"question":"What conductor sizes does the spring terminal accept?","answer":"Solid or stranded copper from 1 to 10 mm² on the main contacts, and 2 × (0.5 to 2.5 mm²) fine-stranded on the coil terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2025-2DB44-3MA0","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/3RT2025-2DB44-3MA0 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}}