What this MasterPact MTZ2 does on the line
The Schneider Electric LV846193 is a MasterPact MTZ2 drawout circuit breaker rated 1600 A at 40 °C, with a H2V performance class delivering 100 kA interrupting capacity at 415 V AC. Four poles, category B selectivity — meaning it coordinates with downstream breakers to isolate only the faulted branch, keeping the rest of the distribution live. This is the part you spec into a main or tie breaker position in a low-voltage switchboard where fault current runs high and uptime matters.
Rated 1600 A continuous at 40 °C — that's the full-frame current, not a derated summer number. If your switchgear ambient runs higher, you'll need to consult the thermal derating curve, but for a typical 40 °C panel this breaker carries its nameplate all day. Icw is 100 kA for 1 second, so it holds in through delayed-tripping coordination schemes. Rated insulation voltage 1000 V AC, impulse withstand 12 kV — this breaker is built for 690 V switchgear applications even though the operational voltage here is listed at 440 V AC. The 12 kV impulse rating means it survives lightning surges and switching transients on industrial networks.
Drawout mounting and panel integration
Drawout chassis — the breaker cassette slides into a fixed cradle, so you can rack it out for maintenance or replacement without disconnecting power cables. Mounts on rails or a base plate; connection pitch is 115 mm. Front and rear connection options on both upside and downside give flexibility for cable or busbar entry in a switchboard lineup. Dimensions: 556 mm wide, 439 mm high, 403 mm deep. That depth matters when you're laying out a cubicle — make sure the door clearance and rear cable space accommodate the drawout travel.