Protecting Your DC Systems Just Got Easier - Here’s How

Whether you’re building switchboards, integrating solar PV systems, or working on industrial control panels, reliable DC circuit protection is critical.

DC systems behave differently from AC - and when faults occur, the risks are higher and harder to control.

NOARK’s DC Circuit Breakers, available and in stock at Switches Plus Components, are purpose-built to provide safe, reliable, and standards-compliant protection in DC installations ranging from compact photovoltaic setups to large-scale industrial and energy systems.

Why DC Protection Demands a Different Approach

DC fault currents don’t behave like AC, they can maintain an arc longer and are more difficult to interrupt. In applications such as solar power, energy storage, mining, and automation, this makes effective circuit protection essential not just for safety, but for system reliability and compliance.

Whether you’re an electrical contractor or an engineer specifying components, NOARK’s specialised DC breakers offer the performance and flexibility to meet the electrical demands of your high-efficiency systems.

NOARK Ex9BP DC MCBs - Compact, Flexible Protection for Low to Mid-Range Applications

The Ex9BP DC Miniature Circuit Breakers (MCBs) are engineered for use in photovoltaic and other low-voltage DC systems where space, modularity, and high interrupting capacity are essential.

Why these MCBs are a smart choice:

• Non-polarised – install in either direction, simplifying layout and reducing installation errors

• Rated 160 - 250 V DC per pole, with versions from 1 to 4 modules wide

• Short-circuit breaking capacity up to 10 kA

• Available in K tripping characteristics

• Designed and tested to IEC/EN 60947-2

• Accepts a full range of modular accessories - up to 3 signal or auxiliary contacts and 2 trip release units

This makes them ideal for residential and commercial PV installations, energy storage systems, and compact control panels where performance and ease of integration are key.

NOARK Ex9MD DC MCCBs - High Capacity Protection for Demanding Installations

When your project involves higher voltage, higher current, or more complex systems, the Ex9MD DC Moulded Case Circuit Breakers (MCCBs) offer robust protection and flexibility.

Commonly used in solar farms, industrial control systems, battery storage, and defence/military infrastructure, these breakers deliver reliable performance under challenging conditions.

Technical highlights:

• Rated current up to 800 A

• Breaking capacity up to 100 kA

• Voltage rating up to 1000 V DC (4-pole)

• Impulse withstand voltage: 8 kV – protects against transient over voltages

• Thermomagnetic trip units for overload and short-circuit protection

• Frame sizes M1 to M5, fixed version

• Fully customisable with accessories like rotary handles, undervoltage releases, and motor actuators

Engineered for DC performance and fully compliant with IEC/EN 60947-2, these breakers are suitable for high-capacity systems requiring stable operation and service continuity.

Where These Products Fit: Industry Specific Applications

NOARK’s DC breakers are used across a wide range of industries that demand dependable and standards-compliant protection:

• Solar PV systems

• Battery energy storage

• Industrial automation and control

• Switchboard construction

• Mining and resource processing

• Defence and aviation power systems

If your installation involves managing DC power safely and efficiently, whether in remote field systems or mission critical industrial environments, NOARK’s circuit breakers provide the protection and adaptability required.

In Stock Now - Ready When You Are

At Switches Plus Components, we understand how important lead times are to your project timelines. That’s why we stock NOARK’s DC breakers - including both Ex9BP MCBs and Ex9MD MCCBs - and make them available for immediate supply.

By choosing NOARK, you’re getting:

• Certified protection for DC applications

• Modular accessories for easy configuration

• Support for a wide range of industries

• Readily available stock, no delays

Secure the Right Protection for Your DC Systems

Our sales team is ready to help you select the right breaker for your application - whether you’re designing a PV combiner box, battery storage cabinet, or high-current industrial board.

Contact us today to ensure your next DC installation is protected by reliable, fully compliant circuit breakers from NOARK - available now at Switches Plus Components.