MERSEN FUSE 1551 CP GLB 20.127 25 20GB15V25P

Why Choose the Mersen S209983 High-Speed Cylindrical Fuse?

The Mersen S209983, also identified as FR20GB15C25P and 20GB15V25P, is a high-performance ultra-rapid cylindrical fuse designed to protect sensitive semiconductor devices, transformers and power electronic equipment against damaging overcurrent and short-circuit conditions. Its fast current-limiting operation helps reduce the fault energy passed into critical electrical components.

Featuring a gLB operating class, the S209983 provides dependable protection for specialised industrial circuits operating at elevated voltages. Its robust cylindrical construction supports reliable service in demanding environments, while the integrated striker provides a clear indication when the fuse has operated and may interface with compatible signalling or tripping accessories.

With a rated current of 25 A, a rated voltage of 1500 V AC and a compact 20 × 127 mm cylindrical body, the Mersen S209983 is suitable for power conversion equipment, industrial drives, rectifiers, transformers and other systems requiring rapid and effective electrical protection.

Key Advantages

• Ultra-rapid current-limiting fuse for sensitive electrical equipment.
• 25 A rated current for industrial power circuits.
• 1500 V AC voltage rating for high-voltage applications.
• gLB operating class for dependable circuit protection.
• Fast fault interruption helps minimise thermal and mechanical damage.
• Integrated striker provides clear fuse operation indication.

Key Features

• Mersen Ferraz Shawmut ultra-rapid fuse technology.
• Manufacturer part number: S209983.
• Product reference: FR20GB15C25P.
• Alternative reference: 20GB15V25P.
• Product designation: 1551 CP GLB 20.127 25.
• Rated current: 25 A.
• Rated voltage: 1500 V AC.
• Fuse dimensions: 20 × 127 mm.
• Operating class: gLB.
• Cylindrical construction with integrated striker.

Reliable Protection for Power Electronic Equipment

Ultra-rapid fuses interrupt excessive fault currents considerably faster than conventional industrial fuse links. This reduces peak current and let-through energy, helping protect sensitive components such as diodes, thyristors, rectifiers, semiconductor modules and power conversion equipment.

The Mersen S209983 combines rapid operation with a high voltage rating and compact cylindrical format. Correct coordination with the system voltage, normal operating current, prospective short-circuit current and compatible fuse holder is essential for safe and dependable protection.

Typical Applications

• Industrial rectifiers and converters.
• Variable speed drives and motor control equipment.
• Power semiconductor protection.
• Transformer protection circuits.
• High-voltage industrial power supplies.
• Industrial control and power distribution panels.