MERSEN FUSE CC6,621 CP GRB 27.60 20 C077006

Why Choose the Mersen C077006 Protistor High-Speed Fuse?

The Mersen C077006 is a high-performance DC semiconductor fuse designed to protect sensitive power electronic components and critical direct-current equipment against damaging overload and short-circuit currents. Part of Mersen's Protistor 27 × 60 mm fuse range, it provides rapid fault interruption for demanding railway, industrial and power conversion applications.

The C077006 is engineered for modern DC equipment operating at elevated temperatures and requiring precise current limitation. Its low pre-arcing I²t helps minimise the electrical and thermal energy transferred to protected components during a fault, while reduced power losses support reliable operation and extended fuse service life.

With a rated current of 20 A, a rated voltage of 660 V DC and a compact cylindrical 27 × 60 mm format, the Mersen C077006 is suitable for protecting semiconductor devices in railway power circuits, auxiliary systems, converters and industrial DC installations. An integrated striker provides clear fuse operation indication and can support compatible signalling arrangements.

Key Advantages

• High-speed protection for semiconductor devices and DC power equipment.
• 20 A rated current for compatible power electronic circuits.
• 660 V DC voltage rating for demanding direct-current applications.
• Low I²t performance helps limit short-circuit damage.
• Reduced power losses support efficient system operation.
• Integrated striker provides fuse operation indication.

Key Features

• Mersen Protistor high-speed cylindrical fuse series.
• 20 A rated current.
• 660 V DC rated voltage.
• gR utilisation category for full-range semiconductor protection.
• gRB design classification for DC power applications.
• Compact 27 × 60 mm cylindrical fuse format.
• Integrated striker for indication or signalling.
• Clip-mounted construction for compatible fuse holders.

Reliable Protection for DC Semiconductor Equipment

Power semiconductor components can be damaged by fault currents that develop too quickly for conventional general-purpose fuses to interrupt safely. High-speed semiconductor fuses limit the energy passed into connected equipment, helping protect converters, rectifiers, traction systems and other valuable electronic components.

The Mersen C077006 combines rapid fault interruption with low power losses and a compact cylindrical construction. Its gR characteristic provides full-range semiconductor protection against overload and short-circuit currents when correctly selected and installed within a coordinated electrical protection system.

Typical Applications

• Railway main power circuits.
• Railway auxiliary electrical systems.
• DC converters and rectifiers.
• Industrial traction equipment.
• Power semiconductor protection.
• DC control and distribution systems.