ASI NDB2-63D4-3 Mini Circuit Breaker (MCB) | 3-Pole, 4A, 480V AC | DIN Rail Mount | D Trip Curve | UL1077 Recognized

The ASI NDB2-63D4-3 Miniature Circuit Breaker (MCB) is a high-performance, UL1077-recognized supplemental circuit protection device, designed for 480V AC electrical systems. With a 4A rating and 3-pole design, this thermal magnetic circuit breaker provides overload and short circuit protection, ensuring reliable and safe operation in industrial, commercial, and residential applications.

This DIN rail-mounted MCB features a D trip curve, making it ideal for highly inductive loads such as motors, transformers, and industrial equipment. Its compact 54mm wide footprint, along with screw clamp terminals, allows for easy installation and secure wiring in control panels, switchgear, and electrical distribution systems.

The NDB2-63D4-3 circuit breaker also includes a visual LED trip indicator, providing instant fault identification for quick maintenance and troubleshooting. With an interrupt capacity of 10kA, it meets rigorous UL1077, IEC60898-1, and GB 10963.1 safety standards, ensuring durability and compliance with industry regulations.
Key Features & Benefits:

🔹 4A, 480V AC Rating – Provides supplemental protection for industrial, commercial, and residential electrical systems.
🔹 3-Pole Configuration – Ensures balanced protection across circuits, making it suitable for various electrical loads.
🔹 Thermal Magnetic Protection – Offers dual overload and short circuit protection for enhanced safety.
🔹 D Trip Curve – Ideal for highly inductive loads, such as motors, transformers, and heavy machinery.
🔹 10kA Interrupt Capacity – High breaking capacity for fault current protection.
🔹 DIN Rail Mounted for Easy Installation – Compact 54mm-wide design for seamless panel integration.
🔹 Screw Clamp Wire Terminations – Provides secure, stable, and easy-to-wire electrical connections.
🔹 Visual LED Trip Indicator – Ensures fast fault detection for quick maintenance and troubleshooting.
🔹 RoHS Compliant & Certified – Meets UL1077, IEC60898-1, GB 10963.1, TUV, CE, and CCC safety standards.
Applications:

🔹 Industrial Control Panels & Automation Systems – Protects control circuits, PLCs, and HMIs from overloads and short circuits.
🔹 Power Distribution & Switchgear – Enhances system safety and reliability in electrical distribution networks.
🔹 Motor Protection & Heavy Equipment – Ideal for highly inductive loads, including motors, transformers, and electrical drives.
🔹 Renewable Energy Systems – Supports solar, wind, and battery energy storage protection.
🔹 Building & Facility Electrical Systems – Ensures safe and efficient operation in commercial buildings and residential applications.
Why Choose ASI?

🔹 High-Performance Circuit Protection – Delivers reliable short circuit and overload protection for electrical circuits.
🔹 Compact & Space-Saving Design – Designed for quick and secure DIN rail mounting.
🔹 Certified for Compliance & Safety – Meets global standards, including UL1077, IEC60898-1, and GB 10963.1.
🔹 Fast & Easy Fault Identification – Features LED trip indication for quick troubleshooting.
🔹 Trusted by Electrical Engineers, OEMs & System Integrators – Used in power distribution, industrial automation, and electrical control applications.
🔹 Bulk Pricing & OEM Customization Available – Contact us for special pricing on large orders.

Order Online Now or Contact Us for Bulk Pricing and Customization!