{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2140-5MN32-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2140-5MN32-0AB0","canonicalUrl":"https://aoctrl.com/siemens/3VA2140-5MN32-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2140-5MN32-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2140-5MN32-0AB0, molded case circuit breaker, 3-pole, 40 A, interrupting capacity 187 kA at 240 V, motor protection design.","salesMarkdown":"The Siemens SENTRON 3VA2140-5MN32-0AB0 is a 3-pole molded case circuit breaker rated for 40 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That SCCR headroom makes it a strong choice for high-fault panels where a standard 25 kA or 36 kA breaker would need upstream fusing or a larger frame. This is a motor-protection-design MCCB — it includes phase failure detection, so it trips on loss of one phase before the motor single-phases and cooks. Physically it measures 105 mm wide, 181 mm tall, 86 mm deep — a compact 3-pole footprint that fits standard Siemens 3VA panel cutouts and busbar systems. The basic switch inside is order code 3VA21405MN320AA0, meaning the trip unit and mechanism are integral; no separate plug-in module to source. ## How it handles the ambient heat from adjacent gear The 40 A rating holds flat across the entire 40–70 °C operating band — no derating curve to calculate when the breaker sits next to a warm drive or transformer in a closed panel. Maximum power loss is 1.6 W, so internal heating from the breaker itself is negligible in the enclosure thermal budget.","metaTitle":"Siemens 3VA2140-5MN32-0AB0 SENTRON MCCB, 40 A, 3-Pole, 187 k","metaDescription":"Siemens SENTRON 3VA2140-5MN32-0AB0 molded case circuit breaker, 40 A continuous, 3-pole, interrupting capacity 187 kA at 240 V. Motor protection design with phase failure detection","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"105 mm","title":"3VA2140-5MN32-0AB0","Height":"181 mm","Maximum":"17 s","Minimum":"4 s","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"3.7 kA","at 40 °C":"40 A","at 45 °C":"40 A","at 50 °C":"40 A","at 55 °C":"40 A","at 60 °C":"40 A","at 65 °C":"40 A","at 70 °C":"40 A","Depth [In]":"3.39 in","Width [In]":"4.13 in","Height [In]":"7.13 in","description":"circuit breaker 3VA2 IEC frame 160 breaking capacity class M Icu=55kA @ 415V 3-pole, motor protection ETU350M, LSI, In=40A overload protection Ir=16A...40A short-circuit protection Isd=3...15 x Ir, Ii=15 x In nut keeper kit 2 auxiliary switches HP","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Motor protection","Communication Function":"No","Phase Failure Detection":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"1.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA21405MN320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HP","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"40 A","Insulation Voltage / Rated Value":"800 V","adjustable trip class (Tc CLASS)":"10A, 10E, 20E","Design Of The Overcurrent Release":"ETU350M","protection class IP / on the front":"IP40","operating power / at AC-3 / at 230 V":"11 000 W","operating power / at AC-3 / at 400 V":"18 500 W","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"160 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA11","Switching Capacity Class Of The Circuit Breaker":"E","Mechanical Service Life (Operating Cycles) / Typical":"25 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cda978e31ec81fb539d5632cb59bd0b3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=569643&mlfb=3VA2140-5MN32-0AB0"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA2140-5MN32-0AB0?","answer":"Submit an RFQ through the distributor desk. The part is sourced and quoted to order; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2140-5MN32-0AB0","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/3VA2140-5MN32-0AB0 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}}