MERSEN FUSE 250V SU 12,5 A 5.20 MI5SU25V12,5

Why Choose the Mersen S087508 5 x 20 mm Medium Time-Lag Miniature Fuse?

The Mersen S087508 is a compact and dependable 5 x 20 mm medium time-lag miniature fuse designed to protect industrial electrical equipment and electronic circuits against sustained overloads and short-circuit currents. Also identified by the catalogue reference MI5SU25V12.5, it provides reliable circuit protection in applications where temporary current surges may occur during normal operation.

Its semi-time-lag operating characteristic allows the fuse to tolerate brief inrush currents generated by equipment such as transformers, power supplies and inductive loads. This helps reduce unnecessary fuse operation during start-up while ensuring that prolonged excessive current is safely interrupted.

Rated at 12.5 A and 250 V AC, the Mersen S087508 is suitable for industrial control panels, electrical distribution equipment, automation systems and OEM machinery. Its standard 5 x 20 mm ceramic construction enables straightforward installation in a compatible miniature fuse holder or clip.

Key Advantages

• Medium time-lag characteristic withstands temporary inrush currents.
• 12.5 A current rating for industrial circuit protection.
• 250 V AC rated voltage for low-voltage electrical equipment.
• Compact 5 x 20 mm cylindrical fuse format.
• Ceramic construction provides dependable thermal and electrical performance.
• Helps minimise nuisance fuse operation during equipment start-up.

Key Features

• Mersen 5SU miniature fuse series.
• 12.5 A rated current.
• 250 V AC rated voltage.
• Medium time-lag or semi-time-delay operating characteristic.
• Standard 5 x 20 mm IEC miniature fuse format.
• Robust ceramic fuse body.
• Designed for overload and short-circuit protection.
• Compatible with suitable 5 x 20 mm fuse holders and clips.

Reliable Protection for Circuits with Start-Up Current

Medium time-lag miniature fuses are designed to tolerate short-duration current peaks that occur when transformers, power supplies and other inductive equipment are energised. These temporary surges may be part of normal operation and could cause nuisance interruption if a quick-acting fuse were installed.

The Mersen S087508 provides a controlled delay during acceptable start-up currents while disconnecting the circuit when excessive current persists. This balance helps protect wiring and connected components while supporting reliable equipment operation and reducing unnecessary maintenance.

Typical Applications

• Industrial control panels.
• Electrical distribution equipment.
• Automation systems.
• Electronic power supplies.
• Control transformers.
• Instrumentation equipment.
• OEM machinery.
• Commercial and industrial electrical equipment.