{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV846542","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV846542","canonicalUrl":"https://aoctrl.com/schneider/LV846542","factsUrl":"https://aoctrl.com/api/mcp/products/LV846542","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ2, LV846542, 3P fixed circuit breaker, 1250 A at 40 °C, 50 kA Icu at 1150 V AC, H10 performance, rear connections.","salesMarkdown":"## MasterPact MTZ2 12 H10 — 1250 A Fixed Circuit Breaker The Schneider Electric LV846542 is a MasterPact MTZ2 3-pole fixed circuit breaker rated for 1250 A at 40 °C, with a 50 kA ultimate breaking capacity (Icu) at 1150 V AC. It belongs to the H10 performance class, meaning it delivers 50 kA at the full rated voltage — the figure that governs fault interruption in a 1150 V distribution panel. Category B selectivity per IEC 60947-2 allows this breaker to coordinate with downstream devices, so a fault on a branch clears without taking the main bus off-line. The short-time withstand (Icw) holds 50 kA for up to 3 seconds, which matters for selective coordination schemes where the breaker must ride through a delayed trip on the feeder. Making capacity (Icm) is 105 kA at 1150 V — the peak let-through the contacts must close into without welding. It ships without a control unit, so the buyer specifies the trip unit separately based on the protection profile needed (LSIG, LSI, or electronic). The frame accepts sensor ratings from 630 A through 1250 A, giving some flexibility if the downstream load changes. ## Deployment and Integration Mounts on rails or a base plate in a fixed position — no draw-out cradle. Dimensions are 422 mm wide by 352 mm high by 300 mm deep, with a 115 mm connection pitch. Altitude derating applies above 2000 m — no derating needed below that. Power dissipation is 100 W at rated current, which must be factored into the enclosure ventilation design. Compliance documentation covers EN/IEC 60947-1, EN/IEC 60947-2, EN/IEC 60947-2 Annex H, and IEC 61557-12. No UL or CSA listing is stated in the evidence — verify with the local Schneider office if a UL 489 mark is required for the installation.","metaTitle":"Schneider Electric LV846542 MasterPact MTZ2 3P 1250 A Circui","metaDescription":"Schneider Electric LV846542 MasterPact MTZ2 3P fixed circuit breaker, 1250 A at 40 °C, 50 kA Icu at 1150 V AC. Sourced to order against RFQ. Current lifecycle stage.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Air Circuit Breakers"],"specifications":{"Depth":"300 mm","Range":"MasterPacT","Width":"422 mm","title":"LV846542","Height":"352 mm","Standards":"EN/IEC 60947-1 EN/IEC 60947-2 EN/IEC 60947-2 Annex H IEC 61557-12","description":"Circuit breaker frame, MasterPact MTZ2 12H10 fixed for MicroLogic X, 1250A, 50kA/1150VAC (Icu), 3P","Control type":"Push-button","Control unit":"Without control unit","Product name":"MasterPact MTZ2","Mounting mode":"Fixed","Sensor rating":"630 A 800 A 1000 A 1250 A","lifecycle_stage":"current","Connection pitch":"115 mm","Mounting support":"Rails Base plate","Performance type":"H10 50 kA 1150 V AC","Pollution degree":"3 conforming to IEC 60947-1","Device short name":"MTZ2 12 H10","Poles description":"3P","Upside connection":"Rear","Device application":"Power distribution protection","Operating altitude":"0...2000 m without derating 2000...5000 m with derating","[In] rated current":"1250 A at 40 °C","Downside connection":"Rear","Selectivity category":"Category B","Electrical durability":"500 cycles 1150 V AC 50/60 Hz conforming to EN/IEC 60947-2","Maximum breaking time":"25 ms","Mechanical durability":"25000 cycles with periodic preventive maintenance","Power dissipation in W":"100 W","IP degree of protection":"IP30 conforming to EN 60529","Product or component type":"Circuit breaker","Suitability for isolation":"Yes conforming to EN/IEC 60947-2","Maximum closing response time":"70 ms","[Ui] rated insulation voltage":"1250 V AC 50/60 Hz","[Ue] rated operational voltage":"1150 V AC 50/60 Hz","Ambient air temperature for storage":"-40...85 °C","Ambient air temperature for operation":"-25...70 °C","[Ics] rated service breaking capacity":"50 kA at 1150 V AC 50/60 Hz","[Uimp] rated impulse withstand voltage":"12 kV","[Icw] rated short-time withstand current":"50 kA 1 s 50 kA 0.5 s 50 kA 3 s","[Icm] rated short-circuit making capacity":"105 kA 1150 V AC at 50/60 Hz","[Icu] rated ultimate short-circuit breaking capacity":"50 kA at 1150 V AC 50/60 Hz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10,650.49 – $11,183.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f8780deddc79f804a32c4611446e98be.pdf","sourceUrl":"https://www.se.com/vn/en/product/LV846542/circuit-breaker-frame-masterpact-mtz2-12h10-fixed-for-micrologic-x-1250a-50ka-1150vac-icu-3p/"},"ai":{"faq":[{"question":"What is the closest alternative to LV846542 in the MasterPact MTZ2 family?","answer":"Within the MasterPact MTZ2 fixed-mount range, the closest alternative would be a different sensor rating (630 A, 800 A, or 1000 A) or a different performance class (H1, H2) — the frame and connections are shared. No pin-compatible drop-in exists with a different rating; the trip unit and sensor must match the load."},{"question":"What is LV846542's listed depth?","answer":"The LV846542 has a depth of 300 mm."},{"question":"What range does LV846542 belong to?","answer":"The LV846542 belongs to the MasterPacT range, specifically the MasterPact MTZ2 series."},{"question":"What compliance documentation does Schneider provide for LV846542?","answer":"The LV846542 complies with EN/IEC 60947-1, EN/IEC 60947-2, EN/IEC 60947-2 Annex H, and IEC 61557-12. It is suitable for isolation per EN/IEC 60947-2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV846542","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/LV846542 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}