The LV846211 is a 4-pole MasterPact MTZ2 drawout circuit breaker rated 1000 A at 40 °C, with an H2V performance class delivering 100 kA Ics at 440 V AC. That Ics figure — 100 kA at both 220/415 V and 440 V — means it clears a bolted fault at full rated voltage without losing the ability to carry rated current afterward, which is the difference between a one-time fuse and a reusable breaker in a main or tie position. The 12 kV Uimp impulse withstand and 100 kA Icw for 1 second confirm it holds through delayed trips on downstream faults, essential for selective coordination in a Category B installation. Drawout mounting means the breaker chassis stays wired to the bus; the removable cradle pulls for maintenance or swap without disturbing power connections.
Suitability for isolation per EN/IEC 60947-2 is confirmed, meaning the open breaker provides a visible disconnect gap for safe maintenance access.
Deployment context
Intended for power distribution protection in main switchboards, distribution panels, and generator or UPS tie points. The drawout form factor suits installations where uptime matters — a spare cradle can be pre-wired and swapped in during a fault event without de-energizing the bus. Ambient operating range of -25 to 70 °C covers most conditioned electrical rooms; storage down to -40 °C is fine for unheated warehouses.