{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1108-5MG36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1108-5MG36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1108-5MG36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1108-5MG36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1108-5MG36-0AA0, molded case circuit breaker, 3-pole, 8 A, 187 kA at 240 V, 121 kA at 415 V, TM110M release, starter protection.","salesMarkdown":"That 8 A holds at 45 °C and 50 °C; derate to 7.04 A at 70 °C if the panel runs hot. Interrupting capacity is the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, dropping to 7.5 kA at 500 V and 690 V. That's a lot of fault current headroom for a 8 A frame — it'll clear a high-energy arc flash without the breaker venting into the enclosure. ## TM110M release — what the li setting means The overcurrent release is a TM110M — a thermal-magnetic unit with a fixed short-circuit pickup (li) at 128 A, both minimum and maximum. That's 16× the 8 A continuous rating, so it's a magnetic-only instantaneous trip at that level; the thermal bimetal handles overloads on the inverse-time curve. ## Panel fit and physical constraints Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a compact 3-pole footprint. IP40 on the front face only. Insulation voltage rated 800 V. Power loss is 2.4 W max. Lifecycle status is current — no discontinuation notice. It's a standard catalog item, not a last-time-buy or NRND part.","metaTitle":"Siemens 3VA1108-5MG36-0AA0 SENTRON MCCB, 8 A, 187 kA at 240","metaDescription":"Siemens SENTRON 3VA1108-5MG36-0AA0 molded case circuit breaker, 3-pole, 8 A rated, 187 kA interrupting at 240 V. Starter protection with TM110M release. Sourced 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":"3VA1108-5MG36-0AA0","Height":"130 mm","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 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 clamp connection","Number Of Poles":"3","Product version":"Starter protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","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","Courant permanent assigné Iu":"8 A","Ground-Fault Monitoring Version":"Without","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"TM110M","protection class IP / on the front":"IP40","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"128 A","Adjustable response value current / li min.":"128 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"I","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Max. rated operational current of the frame size":"160 A","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (1.5 - 70 mm²)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c7d32de5e599882c4de8fc0d7518d6e4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=752543&mlfb=3VA1108-5MG36-0AA0"},"ai":{"faq":[{"question":"Will 3VA1108-5MG36-0AA0 drop into a panel specified for 3VA1110-5MH36-0AA0 without rewiring?","answer":"Same SENTRON 3VA frame family, so the physical footprint (130 mm × 76.2 mm × 70 mm) and mounting pattern are identical — no rewiring needed for the enclosure fit. The difference is the continuous current rating: 8 A on this unit versus the higher rating on the 3VA1110 variant, so verify the load current before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1108-5MG36-0AA0","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/3VA1108-5MG36-0AA0 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}}