{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1108-5MG32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1108-5MG32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1108-5MG32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1108-5MG32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1108-5MG32-0AA0, molded case circuit breaker, 3-pole, 8 A at 40 °C, TM110M overcurrent release, 187 kA at 240 V.","salesMarkdown":"It's a 3-pole unit rated 8 A at 40 °C (full rating holds through 50 °C; above that it derates to 7.76 A at 55 °C, 7.6 A at 60 °C, 7.36 A at 65 °C, and 7.04 A at 70 °C). The TM110M overcurrent release is a thermal-magnetic fixed-trip design — no field-adjustable trip unit, so the 8 A rating is the only setting. That's fine for a fixed motor load where the FLA is known; for variable loads you'd want an adjustable electronic release. Short-circuit breaking capacity varies sharply with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That 7.5 kA at 690 V is the limiting figure — if your panel feeds a 690 V motor starter, the available fault current must stay under 7.5 kA, or you need a current-limiting upstream device. At 415 V the 121 kA rating covers virtually any industrial service entrance. Dimensions: 130 mm height, 76.2 mm width (3 in), 70 mm depth (2.76 in). ## Environment and lifecycle The 70 °C operating ceiling matches the derating curve — at that temperature the breaker is still functional at 7.04 A. Lifecycle status is current — this is an active, in-production part.","metaTitle":"Siemens 3VA1108-5MG32-0AA0 SENTRON MCCB, 3P, 8A, TM110M, 187","metaDescription":"Siemens 3VA1108-5MG32-0AA0 SENTRON molded case circuit breaker, 3-pole, 8A at 40°C, TM110M release, 187kA at 240V. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 mm","title":"3VA1108-5MG32-0AA0","Height":"130 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"7.5 kA","at 690 V":"7.5 kA","at 40 °C":"8 A","at 45 °C":"8 A","at 50 °C":"8 A","at 55 °C":"7.76 A","at 60 °C":"7.6 A","at 65 °C":"7.36 A","at 70 °C":"7.04 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","description":"circuit breaker 3VA1 IEC frame 160 breaking capacity class M Icu=55kA @ 415V 3-pole, starter protection TM110M, FM, In=8A without overload protection short-circuit protection Ii=15 x In nut keeper kit","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":"Starter protection","Communication Function":"No","Phase Failure Detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"2.4 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM110M","Design Of Short-Circuit Protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","protection class IP / on the front":"IP40","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"I","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","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/2fcf936986e24927fb0eb5d15c927e52.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=752542&mlfb=3VA1108-5MG32-0AA0"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3VA1108-5MG32-0AA0?","answer":"The evidence lists 5SQ2370-2YA05, 5SQ2370-2YA04, and 5SQ2370-2YA01 as peer MPNs, but no official cross-reference or direct footprint/electrical equivalence is documented. You would need to compare the physical dimensions and trip curves against your panel layout before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1108-5MG32-0AA0","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/3VA1108-5MG32-0AA0 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}}