{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2027-2BM40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2027-2BM40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT2027-2BM40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2027-2BM40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2027-2BM40-ZX95 power contactor, Size S0, screw and snap-on 35 mm DIN rail mounting, spring-type coil terminals, current production.","salesMarkdown":"It mounts via screw and snap-on onto a 35 mm DIN rail per DIN EN 60715, and its mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward and backward — useful when routing cables in a tight enclosure. An auxiliary switch is built in, saving a separate add-on block for basic feedback. Switching frequency is rated per duty cycle: 1 000 cycles/hour at AC-1 (resistive loads), 750 cycles/hour at AC-2 and AC-3 (motor starting/running), and 250 cycles/hour at AC-4 (plugging/inching). For AC-3e (enhanced motor starting) it also carries 750 cycles/hour. These numbers define the thermal limit of the contactor under repeated operation — exceeding them accelerates contact wear, especially under AC-4 duty where inrush current is highest. The auxiliary contact ratings span from 10 A at 24 V DC down to 0.3 A at 220 V DC, with intermediate values at 48 V (2 A), 60 V (2 A), 110 V (1 A), 125 V (0.9 A), and 400 V (0.3 A). This is a standard resistive DC load curve — inductive loads (e.g., relay coils) will require derating or a suppression diode across the load. The 60 °C ceiling is typical for a panel-mounted contactor without forced cooling; if your enclosure ambient exceeds that, you'll need to derate or add ventilation. Mechanical life is listed at 10 million operations typical — a solid figure for a Size S0 contactor, meaning it will outlast most electro-mechanical cycles in a standard machine before the contacts need inspection. ## Physical Fit and Clearance Dimensions: 102 mm high, 45 mm wide, 107 mm deep. Arcing time is 10 to 10 ms, and DC dropout time is 15 to 18 ms — consistent with a standard AC coil. The tight arcing window means contact erosion is predictable under rated loads. If you're holding a legacy panel built around the 3RT2027-2AP00-ZX95 variant, the 2BM40 drops into the same Size S0 footprint and DIN rail mount — no rewiring needed for the main power path. The difference is in the coil and auxiliary contact configuration, so verify your control voltage and aux contact count against the existing schematic before committing the BOM line.","metaTitle":"Siemens 3RT2027-2BM40-ZX95 SIRIUS Power Contactor, Size S0","metaDescription":"Siemens SIRIUS 3RT2027-2BM40-ZX95 power contactor, Size S0, current production. Screw and snap-on 35mm DIN rail mount. Spring-type coil terminals. Rated for AC-3 switching at 750 c","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"107 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at DC":"15 ... 18 ms","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":"220 V","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":"750 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","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","at AC-3e maximum":"750 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":"5 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"27 A","at 500 V rated value":"2 A","at 600 V rated value":"27 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":"2 hp","at 200/208 V rated value":"10 hp","at 220/230 V rated value":"10 hp","at 460/480 V rated value":"20 hp","at 575/600 V rated value":"25 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","Safety-Related Switching On":"Yes","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"6.3 W","at AC-2 at 400 V rated value":"15 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"22 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":"44 A","at AC-5b up to 400 V rated value":"26.5 A","For Auxiliary And Control Circuit":"spring-loaded terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (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: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"2.3 W","for AWG cables for auxiliary contacts":"2x (20 ... 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)","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":"499 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"341 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"260 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"199 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"162 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","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 (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":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","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":"https://cdn.aoctrl.com/28098ed3fa1bb5d7c15afe29340247c6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=727342&mlfb=3RT2027-2BM40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2027-2BM40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel layout?","answer":"Height 102 mm, width 45 mm, depth 107 mm. Minimum clearances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the sides."},{"question":"What conductor sizes does the main contact accept?","answer":"Solid or stranded conductors from 1 to 10 mm². The auxiliary contact terminals accept 2x (0.5 to 2.5 mm²) solid or stranded."},{"question":"Will this fit in a panel designed for the 3RT2027-2AP00-ZX95?","answer":"Yes, both are Size S0 contactors with the same screw and snap-on 35 mm DIN rail mounting. The footprint and mounting are identical, so it will drop in without rewiring the main power path. However, verify the coil voltage and auxiliary contact configuration against your existing schematic, as those may differ between the two order codes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2027-2BM40-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/3RT2027-2BM40-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}}