What are PROTEK Single Pole D Type MCBs?

PROTEK Single Pole D Type MCBs (Miniature Circuit Breakers) are heavy-duty electrical protection devices designed to protect individual electrical circuits from overloads and short circuits while accommodating equipment with very high inrush currents. These high-performance single pole circuit breakers are ideal for demanding industrial electrical installations, providing reliable circuit protection without nuisance tripping during equipment start-up.

D Type MCBs are designed to trip when the current reaches between 10 and 20 times their rated current. This higher tripping threshold makes them suitable for circuits supplying equipment that generates substantial starting currents, such as large electric motors, transformers, welding equipment, X-ray machines, compressors, industrial pumps, and specialist machinery.

Key Features of PROTEK Single Pole D Type MCBs

• Reliable protection against overloads and short circuits.
• D Type tripping characteristic (10-20 x rated current).
• Designed for circuits with very high inrush currents.
• Single pole protection for individual live conductors.
• Suitable for industrial and specialist commercial applications.
• Compatible with PROTEK distribution boards and consumer units.
• Available in a wide range of current ratings.
• DIN rail mounted for quick and professional installation.
• High breaking capacity for dependable fault protection.
• Manufactured to comply with relevant UK and IEC electrical standards.

Common Applications

PROTEK Single Pole D Type MCBs are widely used in circuits supplying equipment with exceptionally high starting currents, including:

• Large electric motors.
• Industrial machinery.
• Transformers.
• Welding equipment.
• X-ray equipment.
• Compressors and heavy-duty pumps.
• Manufacturing plants.
• Engineering workshops.
• Industrial control panels.
• Three-phase electrical installations.

Why Choose a D Type MCB?

A D Type Miniature Circuit Breaker is specifically designed for applications where electrical equipment produces very high inrush currents during start-up. Unlike B Type MCBs and C Type MCBs, which are intended for domestic and standard commercial loads, D Type MCBs minimise nuisance tripping while still providing rapid disconnection under genuine fault conditions. This makes them the preferred choice for heavy-duty industrial electrical systems and specialist equipment.

Benefits of PROTEK Single Pole D Type MCBs

PROTEK Single Pole D Type MCBs provide dependable electrical circuit protection, long service life, and outstanding performance in demanding environments. They help safeguard expensive industrial equipment from overloads and short circuits while ensuring uninterrupted operation during normal equipment start-up.

Designed for professional electricians, electrical contractors, panel builders, and industrial maintenance engineers, these Miniature Circuit Breakers offer fast installation, reliable operation, and excellent protection for distribution boards, industrial control panels, switchgear, and low-voltage electrical systems. Whether installed in factories, manufacturing facilities, engineering workshops, or commercial premises, PROTEK Single Pole D Type MCBs deliver trusted circuit protection, electrical safety, and reliable performance for demanding industrial applications.