MasterPact MTZ2 20 H1 — 2000 A fixed breaker, Category B selectivity
The Schneider Electric LV848060 is a MasterPact MTZ2 20 H1 fixed-mount circuit breaker, 4-pole, rated 2000 A continuous at 40 °C. This is the H1 performance variant, delivering 66 kA rated service breaking capacity (Ics) at 415 V AC — the same figure holds across 440 V, 500/525 V, and 660/690 V AC, so you don't lose headroom at higher voltages. Category B selectivity (per EN/IEC 60947-2) means it's designed for full discrimination with downstream breakers, critical for minimizing outage scope in a distribution board. Rated short-time withstand (Icw) is 66 kA for 0.5 s and 1 s, dropping to 36 kA at 3 s — that 1-second window covers most delayed-tripping coordination schemes. Making capacity (Icm) hits 145 kA at 415 V, confirming the breaker can close into a full fault without contact welding. Mechanical durability is 20,000 cycles with periodic preventive maintenance; electrical endurance under AC-3 motor-switching duty is 6,000 cycles at 690 V.
Fixed-mount chassis, 352 mm high × 537 mm wide × 300 mm deep. Connection pitch is 115 mm. Upside and downside connections accept both front and rear terminations, giving flexibility for busbar or cable entry in a switchboard. Mounts on rails or a base plate — typical for a dedicated MCC or distribution section.
Also complies with IEC 61557-12 for insulation monitoring. Rated insulation voltage (Ui) 1000 V AC, rated impulse withstand (Uimp) 12 kV.