{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LV846443","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LV846443","canonicalUrl":"https://aoctrl.com/schneider/LV846443","factsUrl":"https://aoctrl.com/api/mcp/products/LV846443","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric MasterPact MTZ1, LV846443, 4P circuit breaker, 630 A at 40 °C, H3 66 kA at 415 V AC, fixed mount, IP30.","salesMarkdown":"The Schneider Electric LV846443 is a fixed-mount MasterPact MTZ1 circuit breaker, 4 poles, rated 630 A at 40 °C. Category B selectivity (per IEC 60947-2) confirms full discrimination with downstream devices, so a fault on a branch feeder clears without tripping this main breaker. ## Breaking capacity and coordination headroom Rated short-time withstand (Icw) is 30 kA for 3 seconds — that is the thermal and mechanical stress the breaker can handle during a delayed trip coordination scheme. Short-circuit making capacity (Icm) is 145 kA at 415 V AC, which covers the peak asymmetrical current on a faulted 400 V transformer secondary. The 12 kV impulse withstand (Uimp) and 1000 V rated insulation voltage (Ui) give headroom for 690 V operational voltage (Ue) applications, common in industrial motor control centers. ## Mounting and integration in the switchboard Fixed mounting on rails or a base plate. The 346 mm width, 301 mm height, and 209 mm depth fit standard MasterPact MTZ1 cutouts. Connection pitch is 70 mm; both front and rear connections are available on the upside and downside. Neutral is on the left. IP30 protection covers the front face against tools and wires. ## Environmental and operational limits Altitude derating applies above 2000 m — no derating needed up to 2000 m. Power dissipation at rated current is 30 W, which should be factored into enclosure thermal calculations. Electrical durability is 6000 cycles at 440 V AC under AC-23A and AC-3 duty; mechanical durability is 10,000 cycles with periodic preventive maintenance. Maximum breaking time is 25 ms; closing response is 50 ms.","metaTitle":"Schneider Electric LV846443 MasterPact MTZ1 630A 4P Circuit","metaDescription":"Schneider Electric LV846443 MasterPact MTZ1 circuit breaker, 630 A rated, 4 poles, H3 66 kA at 415 V AC. Active production, sourced to order. EN/IEC 60947-2.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Air Circuit Breakers"],"specifications":{"Depth":"209 mm","Range":"MasterPacT","Width":"346 mm","title":"LV846443","Height":"301 mm","Standards":"EN/IEC 60947-1 EN/IEC 60947-2 EN/IEC 60947-2 Annex H IEC 61557-12","description":"Circuit breaker frame, MasterPact MTZ1 06H3 fixed for MicroLogic X, 630A, 66kA/415VAC (Icu), 4P","Control type":"Push-button","Control unit":"Without control unit","Product name":"MasterPact MTZ1","Mounting mode":"Fixed","Sensor rating":"400 A 630 A","lifecycle_stage":"current","Connection pitch":"70 mm","Mounting support":"Rails Base plate","Neutral position":"Left","Performance type":"H3 66 kA 415 V AC","Pollution degree":"3 conforming to IEC 60947-1","Device short name":"MTZ1 06 H3","Poles description":"4P","Upside connection":"Front Rear","Device application":"Power distribution protection","Operating altitude":"0...2000 m without derating 2000...5000 m with derating","[In] rated current":"630 A at 40 °C","Downside connection":"Front Rear","Selectivity category":"Category B","Electrical durability":"6000 cycles 440 V AC 50/60 Hz at In conforming to EN/IEC 60947-2 AC-23A: 6000 cycles 440 V AC 50/60 Hz at In conforming to EN/IEC 60947-3 AC-3: 6000 cycles 440 V AC 50/60 Hz at In conforming to EN/IEC 60947-3","Maximum breaking time":"25 ms","Mechanical durability":"10000 cycles with periodic preventive maintenance","Power dissipation in W":"30 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":"50 ms","[Ui] rated insulation voltage":"1000 V AC 50/60 Hz","[Ue] rated operational voltage":"690 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 440 V AC 50/60 Hz 50 kA at 220/415 V AC 50/60 Hz","[Uimp] rated impulse withstand voltage":"12 kV","[Icw] rated short-time withstand current":"30 kA 3 s 50 kA 1 s 50 kA 0.5 s","[Icm] rated short-circuit making capacity":"145 kA 220/415 V AC at 50/60 Hz 145 kA 440 V AC at 50/60 Hz","Integrated instantaneous protection (DIN in kA peak)":"99...121 kA","[Icu] rated ultimate short-circuit breaking capacity":"66 kA at 220/415 V AC 50/60 Hz 66 kA at 440 V AC 50/60 Hz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3,930.99","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/754ce1d51f3f8919ac3d206b564e4207.pdf","sourceUrl":"https://www.se.com/th/en/product/LV846443/circuit-breaker-frame-masterpact-mtz1-06h3-fixed-for-micrologic-x-630a-66ka-415vac-icu-4p/"},"ai":{"faq":[{"question":"How do I get current pricing and availability for LV846443?","answer":"The LV846443 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm quote."},{"question":"What is the closest alternative to LV846443 in the MasterPact family?","answer":"Within the MasterPact MTZ1 range, the closest alternative would be a different performance class (H1, H2) or current rating (400 A, 800 A) variant. The LV846443 is the 630 A, 4-pole, H3 (66 kA) fixed-mount version. A lower-breaking-capacity variant (e.g., H1 at 42 kA) could be considered if fault levels permit, but the footprint and mounting are identical."},{"question":"What compliance documentation does LV846443 carry?","answer":"The LV846443 is certified to EN/IEC 60947-1, EN/IEC 60947-2, and EN/IEC 60947-2 Annex H, plus IEC 61557-12. It is suitable for isolation per EN/IEC 60947-2. Specific RoHS/REACH/UL documentation should be confirmed at quote time, as the evidence does not list those marks."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LV846443","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/LV846443 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}}