{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VM1108-5MG32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VM1108-5MG32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VM1108-5MG32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VM1108-5MG32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VM1108-5MG32-0AA0, 3-pole molded case circuit breaker, 128 A maximum, TM110M thermal-magnetic release, 187 kA interrupting at 240 V AC.","salesMarkdown":"The Siemens SENTRON 3VM1108-5MG32-0AA0 is a 3-pole molded case circuit breaker rated for 128 A maximum with a TM110M thermal-magnetic release — the thermal element handles overloads, the magnetic element catches short-circuit events. The interrupting ratings are what make this part interesting: 187 kA at 240 V AC, 121 kA at 415 V, 75 kA at 440 V, and 17 kA at 500 V. The 800 V rated insulation voltage tells you the internal clearances are built for 480/600 V class systems, not just 240 V residential. Thermal derating is on the datasheet and it matters for panel fill: at 40 °C it carries the full 8 A continuous, but at 55 °C it's down to 7.76 A, and at 70 °C it's 7 A (–). The 2 W maximum power loss is low enough that it won't drive internal cabinet temperature up by itself. The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep (–). That 76.2 mm width is three inches — it fits a standard 3-pole MCCB footprint on DIN rail or a panel-mount base.","metaTitle":"Siemens 3VM1108-5MG32-0AA0 SENTRON MCCB, 128A, 187kA at 240V","metaDescription":"Siemens SENTRON 3VM1108-5MG32-0AA0 molded case circuit breaker, 3-pole, 128A max, TM110M release. Rated 187kA at 240V AC. 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","Height":"130 mm","Maximum":"128 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75 kA","at 500 V":"17 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":"7.4 A","at 70 °C":"7 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","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":"Startetptotection","Communication Function":"No","Phase Failure Detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"2 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 capacity values in DC power systems, see the 3VA Molded Case Circuit Breaker Manual; link available 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","operating voltage / at DC / rated value":"500 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":"15 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front connection"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/25ab1ec2f04ffb04d4e4fd8818efbfa8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=646021&mlfb=3VM1108-5MG32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VM1108-5MG32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of 3VM1108-5MG32-0AA0 at 240 V?","answer":"The interrupting rating at 240 V AC is 187 kA. At 415 V it is 121 kA, at 440 V it is 75 kA, and at 500 V it is 17 kA (–)."},{"question":"Where can I buy 3VM1108-5MG32-0AA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Does 3VM1108-5MG32-0AA0 have a ground-fault monitoring function?","answer":"No, this variant is without ground-fault monitoring. It is a straight thermal-magnetic breaker with no undervoltage release or communication function."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VM1108-5MG32-0AA0","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/3VM1108-5MG32-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}