Schneider 18655 Acti9 NG125N 4P 50A C-Curve MCB 25kA

The Schneider Electric 18655 is an Acti9 NG125N miniature circuit breaker (MCB) delivering overload and short-circuit protection in power distribution circuits. This 4-pole, 50A device uses a Type C tripping curve and offers a 25kA breaking capacity (Icu at 380-415V AC, EN/IEC 60947-2), suiting demanding commercial and industrial installations.

• Range: Acti9 NG125; device short name NG125N
• Poles: 4P, 4 protected poles
• Rated current [In]: 50 A at 40 °C
• Tripping curve: Type C; magnetic trip limit 8 x In
• Breaking capacity (Icu): 25 kA at 380-415 V AC, 50 kA at 220-240 V AC, 20 kA at ≤500 V DC (EN/IEC 60947-2)
• Rated service breaking capacity (Ics): 18.75 kA at 380-415 V AC; 37.5 kA at 220-240 V AC
• Rated operational voltage [Ue]: 380-415 V AC, up to 500 V AC, ≤500 V DC
• Trip unit technology: thermal-magnetic
• Utilisation category A; suitable for isolation
• Rated insulation voltage [Ui]: 690 V AC; rated impulse withstand [Uimp]: 8 kV
• Mounting: clip-on, 35 mm symmetrical DIN rail; 12 x 9 mm pitches; width 108 mm
• Terminals: tunnel type, 1.5-50 mm² rigid / 1-35 mm² flexible; tightening torque 3.5 N.m
• Protection: IP20 / IK05; pollution degree 3; overvoltage category IV
• Operating temperature: -30 to 70 °C
• Mechanical durability 20,000 cycles; electrical durability 10,000 cycles
• Standards: EN/IEC 60947-2