Schneider 18658 NG125N Circuit Breaker 80A 4P 25kA

The Schneider Electric 18658 is a 4-pole miniature circuit breaker from the Acti 9 NG125N range, rated at 80 A at 40°C with a C tripping curve. Designed for electrical energy distribution in AC and DC networks, it delivers a breaking capacity of up to 25 kA at 380-415 V AC and up to 50 kA at 220-240 V AC per EN/IEC 60947-2.

Technical specifications:

• Commercial reference: 18658
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Acti 9 NG125
• Product type: Miniature circuit breaker (MCB)
• Device designation: NG125N
• Number of poles: 4P (4 protected poles)
• Rated current [In]: 80 A at 40°C
• Tripping curve: C
• Network type: AC and DC
• Protection technology: Thermomagnetic
• Rated voltage [Ue]: 220-240 V / 380-415 V / 440 V / 500 V AC 50/60 Hz; up to 500 V DC
• Breaking capacity [Icu]: 50 kA at 220-240 V AC / 25 kA at 380-415 V AC / 20 kA at 440 V AC / 10 kA at 500 V AC / 20 kA at up to 500 V DC, per EN/IEC 60947-2
• Rated insulation voltage [Ui]: 690 V AC per EN/IEC 60947-2
• Rated impulse withstand voltage [Uimp]: 8 kV per EN/IEC 60947-2
• Usage category: A per IEC 60947-2
• Overcurrent protection limit: 8 x In
• Mounting: Clip-on, 35 mm symmetrical DIN rail
• Dimensions (WxHxD): 108 x 103 x 81 mm
• Weight: 0.96 kg
• IP rating: IP20 per IEC 60529
• IK rating: IK05 per EN/IEC 62262
• Operating temperature: -30 to 70°C
• Connection terminals: Tunnel type, 16-70 mm² rigid / 10-50 mm² flexible; tightening torque 6 N.m
• Mechanical durability: 20,000 cycles; electrical durability: 5,000 cycles

Features and benefits:

• Suitable for use as an isolator per IEC 60947-2, enabling safe circuit isolation
• Integrated locking capability supports lockout-tagout safety procedures
• Trip indicator and ON/OFF readout provide fast visual status confirmation
• Wide conductor acceptance range: 16-70 mm² rigid or 10-50 mm² flexible cables
• Rated for pollution degree 3 and overvoltage category IV for demanding environments

Applications:

• Main circuit protection in industrial and commercial distribution boards
• Protection of outgoing circuits in low-voltage switchgear and controlgear assemblies
• AC and DC power distribution networks up to 500 V
• Installations with high short-circuit levels requiring robust 25 kA protection at 400 V

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

Also known as: Schneider 18658, Schneider Electric 18658, NG125N 80A 4P MCB.