MERSEN FUSE 250V SU 4 A 5.20 MI5SU25V4

Why Choose the Mersen M087503 5 x 20 mm Medium Time-Lag Fuse?

The Mersen M087503, catalogue reference MI5SU25V4, is a compact 5 x 20 mm medium time-lag cartridge fuse designed to provide reliable overcurrent protection for electrical equipment, control systems and industrial electronic circuits. Rated at 4 A and 250 V AC, it helps protect components and wiring against sustained overloads and short-circuit conditions.

The fuse uses Mersen's SU medium time-lag operating characteristic, allowing it to tolerate brief current surges that may occur when transformers, motors, power supplies or other inductive loads are energised. This controlled response helps reduce nuisance fuse operation while maintaining effective protection against damaging overcurrents.

With its standard 5 x 20 mm cartridge format and high interrupting capability, the M087503 is suitable for compatible fuse clips and holders used in industrial machinery, automation equipment and OEM electrical assemblies. Its compact dimensions make it an effective circuit protection solution where panel space is limited.

Key Advantages

• Compact 5 x 20 mm cartridge fuse for industrial and electronic equipment.
• 4 A rated current for dependable branch and component protection.
• 250 V AC voltage rating for common control and power circuits.
• Medium time-lag response tolerates short-duration starting currents.
• High breaking capacity supports reliable fault interruption.
• Standard cartridge dimensions simplify replacement and maintenance.

Key Features

• Mersen SU miniature fuse series.
• Catalogue number: MI5SU25V4.
• Rated current: 4 A.
• Rated voltage: 250 V AC.
• Operating characteristic: Medium time-lag.
• Fuse size: 5 x 20 mm.
• Interrupting rating: Up to 10 kA.
• Suitable for inline, clip and fuse holder mounting.
• Designed for industrial and electronic circuit protection.

Reliable Protection for Electrical Equipment

Medium time-lag fuses are designed to withstand temporary inrush currents without opening unnecessarily. This makes them suitable for circuits containing transformers, motors, capacitive power supplies and other loads that draw a brief surge of current during start-up.

When an overload continues beyond the permitted time-current profile, or when a short circuit occurs, the Mersen M087503 interrupts the circuit to help prevent damage to wiring and electrical components. Its compact format and defined electrical ratings make it suitable for equipment manufacture, panel building and replacement maintenance.

Typical Applications

• Industrial control panels.
• Automation and process control equipment.
• Power supplies and control transformers.
• Motor and solenoid control circuits.
• Instrumentation and electronic equipment.
• Industrial machinery.
• OEM electrical assemblies.
• Maintenance and replacement applications.