The Schneider Electric LV848354 is a MasterPact MTZ2 drawout circuit breaker, 4-pole, rated 4000 A at 40 °C. This is a Category B breaker, meaning it provides selectivity with upstream devices during a fault, so only the downstream section clears. The drawout mounting means the breaker slides into a chassis on rails or a base plate, making it serviceable without disconnecting main power cables — a real advantage when you're swapping a unit in a live panel. The chassis adds 403 mm depth and 556 mm width; without it, the breaker alone is 300 mm deep and 493 mm wide. Connection pitch is 150 mm, and both front and rear connections are available.
Electrical performance and ratings
The LV848354 is rated for 690 V AC operational voltage with an insulation voltage of 1000 V AC. Its service breaking capacity (Ics) is 100 kA at 220/415 V and 440 V, 85 kA at 500/525 V and 660/690 V. Making capacity (Icm) reaches 220 kA at 415/440 V. Short-time withstand (Icw) is 85 kA for 0.5 s and 1 s, 75 kA for 3 s — important for coordinating with downstream breakers in a selective system. Electrical durability is rated at 6000 cycles under AC-3 duty at 440/690 V, and 5000 cycles at 440 V under EN/IEC 60947-2. Maximum breaking time is 25 ms; closing response time is 70 ms. Power dissipation is 900 W — factor that into panel cooling.
Standards and environmental limits
The breaker complies with EN/IEC 60947-1, EN/IEC 60947-2, EN/IEC 60947-2 Annex H, and IEC 61557-12. IP30 protection — fine for enclosed switchgear, not for washdown areas.
Sensor ratings and control
The breaker supports sensor ratings of 2000 A, 2500 A, 3200 A, and 4000 A — the 4000 A rating matches the breaker's own In. It ships without a control unit; control is via push-button. Neutral position is right. Impulse withstand voltage is 12 kV.