{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2040-8HM32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2040-8HM32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2040-8HM32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2040-8HM32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2040-8HM32-0AA0, molded case circuit breaker, 3-pole, 40 A rated, 330 kA breaking capacity at 415 V, line protection design, adjustable thermal-magnetic trip.","salesMarkdown":"## Siemens SENTRON 3VA2040-8HM32-0AA0 — 40 A MCCB, Line Protection, 3-Pole At 415 V it interrupts 330 kA, which covers high-fault-current scenarios common in industrial switchgear close to the transformer secondary. ## Breaking capacity and fault clearance The 330 kA at 415 V and 440 kA at 240 V place this in the highest interrupting class for a 40 A frame — it clears faults without cascading to upstream breakers. ## Ground-fault monitoring and trip configuration This variant includes summation-current ground-fault monitoring, meaning it sums the L-conductor currents internally to detect residual imbalance — no external CT or relay module needed. The trip indicator is absent, so fault cause is not stored on the breaker face; pair it with a remote indication contact if post-trip diagnostics matter. The 105 mm width and 181 mm height fit standard Siemens 3VA modular spacing — drops into the same cutout as other 3VA20-frame breakers.","metaTitle":"Siemens 3VA2040-8HM32-0AA0 SENTRON MCCB, 40 A, 3-Pole, 330 k","metaDescription":"Siemens SENTRON 3VA2040-8HM32-0AA0 molded case circuit breaker, 40 A rated, 3-pole, 330 kA breaking capacity at 415 V. Current production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"105 mm","title":"3VA2040-8HM32-0AA0","Height":"181 mm","Maximum":"480 A","Minimum":"60 A","at 240 V":"440 kA","at 415 V":"330 kA","at 440 V":"330 kA","at 500 V":"220 kA","at 690 V":"52.5 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 100 breaking capacity class L Icu=150kA @ 415V 3-pole, line protection ETU330, LIG, In=40A overload protection Ir=16A...40A short-circuit protection Ii=1.5...12 x In ground-fault protection Ig=0.4... 1 x In, tg=0.1/0.3s nut keeper kit","Initial Value":"16 A","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"40 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"1.2 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Summation current formation L-conductor","Continuous Current / Rated Value":"40 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU330","protection class IP / on the front":"IP40","Product Function / Grounding Protection":"Yes","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"100 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"L","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/a6dbd097c48f297c4921689e9053f3ca.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=76052&mlfb=3VA2040-8HM32-0AA0"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2040-8HM32-0AA0 at 415 V?","answer":"330 kA at 415 V. At 240 V it interrupts 440 kA, and at 690 V it still clears 52.5 kA."},{"question":"Will 3VA2040-8HM32-0AA0 drop into a panel specified for 3VA2040-8HN42-0AA0?","answer":"Both are 3VA20-frame 3-pole breakers with the same 105 mm width and 181 mm height, so the mechanical fit and busbar positions are identical. The difference is in the internal trip unit and accessories — the -8HM32 variant includes summation-current ground-fault monitoring, while the -8HN42 may have a different accessory configuration. Rewiring is not needed for the line and load connections, but verify the ground-fault wiring and any auxiliary contact wiring match the panel schematic."},{"question":"Where can I buy 3VA2040-8HM32-0AA0 and how is it quoted?","answer":"Sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a binding commercial offer."},{"question":"What is the adjustable trip range on this MCCB?","answer":"The thermal-magnetic trip is adjustable from 16 A to 40 A full-scale. The continuous current rating is 40 A, and it holds that rating across the entire 40 °C to 70 °C ambient range without derating (–)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2040-8HM32-0AA0","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/3VA2040-8HM32-0AA0 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}}