{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2327-1BA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2327-1BA40","canonicalUrl":"https://aoctrl.com/siemens/3RT2327-1BA40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2327-1BA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2327-1BA40 contactor, Size S0, 12 V DC coil, screw-type terminals, 3-pole, 35 mm DIN rail mount.","salesMarkdown":"## SIRIUS Size S0 contactor with 12 V DC coil The 3RT2327-1BA40: The 12 V DC coil with screw-type terminals suits applications where a low-voltage DC control circuit is already present — common in PLC-driven panels or battery-backed safety systems. ## DC switching capability across voltage levels The non-linear drop reflects DC arc extinction physics: higher voltage arcs sustain longer, so the contact gap and arc chute limit the current at elevated voltages. The 12 V DC coil draws a pickup current with a dropout ratio of 0.8 and a full-scale value of 1.1 — meaning the contactor picks up reliably at 80% of rated voltage and drops out at 110% of rated voltage, giving a clean hysteresis band for control logic. Switching times are specified: DC operate time 15 to 18 ms, arcing time 10 ms. These numbers matter when coordinating with upstream fuse or breaker curves — the arcing time sets the minimum fault-clearing window the contactor can survive without contact welding. ## Panel fit and mounting flexibility The Size S0 frame (85 mm height, 60 mm width, 107 mm depth) fits standard 8-module enclosure widths. This accommodates tight enclosures where the contactor must be oriented to clear busbars or wiring ducts. These are minimum air gaps to adjacent metalwork or other devices — critical for maintaining rated insulation and avoiding flashover in humid environments. ## Wiring and auxiliary contact provisions Stranded wire range: 1 to 10 mm². The screw-type terminals with cage clamps handle the full range without ferrules for solid wire, but stranded wire benefits from bootlace ferrules to prevent strand fan-out. The storage range covers most warehouse conditions; the operating range suits unheated plant floors but not freezer applications below -25 °C. This means the 3RT2327-1BA40 is available through standard Siemens distribution channels and carries full manufacturer warranty and support. Sourced to order against BOM quantities. No stock-holding claim; each order is verified against the manufacturer's current production schedule.","metaTitle":"Siemens 3RT2327-1BA40 SIRIUS Contactor, Size S0","metaDescription":"Siemens 3RT2327-1BA40 SIRIUS contactor, Size S0 frame, 12 V DC coil, screw terminals, 10 A at 24 V DC switching. Current production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"107 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"60 mm","at DC":"15 ... 18 ms","title":"3RT2327-1BA40","Height":"85 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"1 ... 10 mm²","Downwards":"10 mm","Attachable":"2","Arcing Time":"10 ... 10 ms","At The Side":"6 mm","Rated Value":"12 V","description":"contactor AC-1, 50 A, 400 V / 40 °C, 4-pole, 12 V DC, auxiliary contacts: 1 NO + 1 NC, screw terminal, size: S0","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Type Of Voltage":"DC","lifecycle_stage":"current","Auxiliary Switch":"Yes","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","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":"Contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"6 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":"10 A","at 400 V rated value":"3 A","at 500 V rated value":"2 A","at 600 V rated value":"0.1 A","at 690 V rated value":"1 A","Instantaneous Contact":"1","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC in hot operating state":"12 W","at AC-3 at 400 V rated value":"7.5 kW","at AC-4 at 400 V rated value":"7.5 kW","Substance Prohibitance (Date)":"10/01/2009","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"gG: 20 A (690 V, 100 kA)","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","operating frequency at AC-1 maximum":"1 000 1/h","With Type Of Coordination 1 Required":"gG: 63 A (690 V, 100 kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"3 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","number of NO contacts for main contacts":"4","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":"4","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Product Function Short Circuit Protection":"No","mirror contact according to IEC 60947-4-1":"Yes","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"DC","Limited To 1 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"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","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (690 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"10 mm²","Of The Auxiliary And Control Circuit With Degree Of Pollution 3 Rated Value":"690 V","Design Of The Miniature Circuit Breaker For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (230 V, 400 A)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b7f38e9f9d86e59b04eac68bfea90c40.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=553750&mlfb=3RT2327-1BA40"},"ai":{"faq":[{"question":"What is the DC switching capacity of the 3RT2327-1BA40 at 24 V?","answer":"At 24 V DC the contactor switches 10 A. Always select the contactor based on the actual DC voltage and load current in the circuit."},{"question":"Where can I buy the 3RT2327-1BA40 and get a price?","answer":"No stock-holding claim is made here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2327-1BA40","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/3RT2327-1BA40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}