DC Circuit Breaker 1P 300V

Noark Ex9BD125-1P – 1-Pole High-Current PV DC Miniature Circuit Breaker

The Ex9BD125-1P series is a robust, high-current DC miniature circuit breaker engineered for photovoltaic (PV), battery storage and other direct-current power systems. Designed for reliable protection and safe isolation, it delivers strong performance in demanding DC environments where higher energy levels must be safely controlled.

Key Features

• High-current DC protection for PV arrays, battery systems and DC distribution circuits.
• 1-pole configuration suitable for single-conductor protection and dedicated DC feeds.
• Thermal-magnetic trip mechanism for precise overload and short-circuit protection.
• Enhanced arc-quenching design for safe interruption under heavy DC loads.
• Compact DIN-rail mount design for neat and efficient panel assembly.
• Durable, long-life construction engineered for harsh solar and off-grid environments.

Typical Applications

• PV string and sub-array protection.
• Battery banks and DC storage system distribution.
• Hybrid inverter DC circuits.
• Dedicated DC feeders and auxiliary circuits in energy systems.
• Telecom, off-grid cabins and industrial DC panels.

Installation Notes

• Mount on standard DIN rail inside a suitable enclosure.
• Follow correct polarity and wiring direction for DC installations.
• Ensure all upstream and downstream protective devices are properly coordinated.
• Install according to SANS/IEC guidelines for PV and DC installations.

The Ex9BD125-1P series provides compact, high-strength protection for DC systems, making it a trusted choice for solar professionals and installers working with higher-power PV and storage applications.