Schneider 18840 Miniature Circuit Breaker (MCB), Acti9 NG125L, 2P D16A 50kA

The Schneider Electric 18840 is a 2-pole miniature circuit breaker (MCB) from the Acti9 NG125L series, rated at 16A with a D tripping curve. Designed for distribution applications, it delivers a high breaking capacity of 50kA at 380-415V AC, making it suitable for demanding industrial and commercial installations.

Technical specifications:

• Commercial reference: 18840
• Manufacturer: Schneider Electric
• EAN:
• Series / range: Acti9 NG125
• Product type: Miniature circuit breaker (MCB)
• Device short name: NG125L
• Application: Distribution
• Number of poles: 2P
• Number of protected poles: 2
• Neutral position: Left
• Rated current [In]: 16A at 40°C
• Tripping curve: D
• Trip unit technology: Thermal-magnetic
• Magnetic tripping limit: 12 x In +/- 20%
• Network type: AC / DC
• Rated operational voltage [Ue]: 220-240V AC / 380-415V AC / 440V AC / 500V AC / 250V DC
• Breaking capacity [Icu]: 100kA at 220-240V AC - 50kA at 380-415V AC - 40kA at 440V AC - 15kA at 500V AC - 36kA at 250V DC (EN/IEC 60947-2)
• Rated service breaking capacity [Ics]: 75kA at 220-240V AC - 37.5kA at 380-415V AC - 30kA at 440V AC - 11.25kA at 500V AC - 50kA at 250V DC
• Rated insulation voltage [Ui]: 690V AC
• Rated impulse withstand voltage [Uimp]: 8kV
• Utilisation category: Category A
• Suitable for isolation: Yes
• Mounting: Clip-on, 35mm symmetrical DIN rail
• Mounting position: Vertical
• Width: 54mm
• Height: 103mm
• Depth: 81mm
• Weight: 0.48kg
• Connection terminals: Tunnel type, 1.5-50mm² rigid / 1-35mm² flexible
• Tightening torque: 3.5 N.m
• Wire stripping length: 20mm
• IP protection rating: IP20 (IEC 60529)
• IK protection: IK05 (EN/IEC 62262)
• Operating temperature: -30 to 70°C
• Storage temperature: -40 to 70°C
• Operating altitude: 2000m
• Pollution degree: 3
• Mechanical durability: 20000 cycles
• Electrical durability: 10000 cycles
• Standard: EN/IEC 60947-2

Features and benefits:

• High breaking capacity of 50kA at 380-415V AC provides robust short-circuit protection in demanding distribution networks
• D tripping curve suits loads with high inrush currents, offering delayed magnetic tripping at 12 x In
• Compatible with both AC and DC networks up to 250V DC, increasing installation flexibility
• Integrated padlocking feature allows the breaker to be locked in open or closed position for safety
• Comb busbar and distribution block compatible for streamlined panel wiring
• Contact position indicator and trip indicator provide clear local signalling of device status

Applications:

• Industrial distribution boards requiring high breaking capacity protection
• Commercial electrical panels with high inrush current loads such as motors and transformers
• DC distribution systems up to 250V in renewable energy or telecom installations
• Main circuit protection in switchgear assemblies and control panels

Compliant with EN/IEC 60947-2. Part of the Schneider Electric Acti9 NG125 range.

Also known as: Schneider 18840, Schneider Electric 18840, Acti9 NG125L 2P D16A MCB, NG125L 16A D curve circuit breaker.