Schneider 18862 Miniature Circuit Breaker (MCB), Acti9 NG125L, 4P D40A 50kA

Schneider Electric 18862 is a 4-pole miniature circuit breaker (MCB) from the Acti 9 NG125L series, rated at 40 A with a D tripping curve. Designed for AC and DC electrical power distribution, it delivers an ultimate breaking capacity of up to 100 kA at 220-240 V AC, making it suitable for demanding industrial and commercial installations.

Technical specifications:

• Commercial reference: 18862
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Acti 9 NG125
• Device short name: NG125L
• Product type: Miniature circuit breaker (MCB)
• Number of poles: 4P
• Number of protected poles: 4
• Neutral conductor position: Left
• Rated current [In]: 40 A at 40°C
• Tripping curve: D
• Network type: AC / DC
• Protection technology: Thermomagnetic
• Rated voltage [Ue]: 220-240 V AC / 380-415 V AC / 440 V AC / 500 V AC / ≤500 V DC (50/60 Hz)
• Ultimate breaking capacity [Icu]: 100 kA at 220-240 V AC / 50 kA at 380-415 V AC / 40 kA at 440 V AC / 15 kA at 500 V AC / 36 kA at ≤500 V DC (EN/IEC 60947-2)
• Service breaking capacity [Ics]: 75 kA at 220-240 V AC / 37.5 kA at 380-415 V AC / 30 kA at 440 V AC / 11.25 kA at 500 V AC / 50 kA at 500 V DC
• Rated insulation voltage [Ui]: 690 V AC
• Rated impulse withstand voltage [Uimp]: 8 kV
• Overcurrent protection limit: 12 x In ±20%
• Usage category: Category A (IEC 60947-2)
• Suitable for isolation: Yes (IEC 60947-2)
• Mounting: Snap-on, 35 mm symmetrical DIN rail
• Handle mounting position: Vertical
• Busbar comb distribution block: Compatible (12 rows, 9 mm pitch)
• Dimensions (W x H x D): 108 x 103 x 81 mm
• Weight: 0.96 kg
• Connection terminals: Tunnel terminals 1.5-50 mm² rigid / 1-35 mm² flexible
• Wire stripping length: 20 mm
• Tightening torque: 3.5 N.m
• IP rating: IP20 (IEC 60529)
• IK rating: IK05 (EN/IEC 62262)
• Pollution degree: 3 (IEC 60947-2)
• Overvoltage category: IV
• Operating temperature: -30 to 70°C
• Storage temperature: -40 to 70°C
• Operating altitude: up to 2000 m
• Relative humidity: 95% at 55°C
• Mechanical durability: 20,000 cycles
• Electrical durability: 10,000 cycles
• Lockout provision: Integrated locking
• Standard: EN/IEC 60947-2
• Warranty: 18 months

Features and benefits:

• D tripping curve designed for loads with high inrush currents such as motors and transformers
• High ultimate breaking capacity up to 100 kA for use in high fault-current environments
• Dual network compatibility - suitable for both AC and DC systems up to 500 V
• Integrated lockout provision enables safe maintenance isolation
• Contact position indicator and trip indicator provide clear local status reading
• Busbar comb distribution block compatible for efficient panel wiring

Applications:

• Industrial and commercial electrical distribution boards requiring high breaking capacity
• Protection of motor feeders and transformer primaries with significant inrush currents
• Main incoming protection in switchboards operating at overvoltage category IV
• DC distribution systems up to 500 V
• Power distribution in demanding environments with wide operating temperature ranges

Compliant with EN/IEC 60947-2. Part of the Schneider Electric Acti 9 NG125 range.

Also known as: Schneider 18862, Schneider Electric 18862, NG125L 4P D40 MCB, Acti9 NG125L 40A D curve.