MERSEN FUSE 250V 5ST 12,5A 5X20 MI5ST25V12,5

Why Choose the Mersen Z233449 MI5ST25V12.5 Miniature Fuse?

The Mersen Z233449 MI5ST25V12.5 is a dependable time-delay miniature cartridge fuse designed to protect industrial equipment, control circuits and electrical assemblies against sustained overloads and short circuits. Part of the established Mersen 5ST IEC miniature fuse range, it is suitable for equipment that experiences temporary inrush currents during normal start-up.

Manufactured in the standard 5 × 20 mm glass cartridge format, the Z233449 can be installed in compatible miniature fuse holders and fuse clips. Its transparent glass body allows the internal fuse element to be inspected visually, supporting efficient fault diagnosis and routine electrical maintenance.

With a rated current of 12.5 A and a rated voltage of 250 V AC, this fuse is suitable for power supplies, transformers, control panels and industrial machinery. Its time-delay characteristic helps prevent nuisance operation caused by brief start-up surges while maintaining reliable protection against prolonged overcurrent conditions.

Key Advantages

• Time-delay operation withstands temporary start-up and inrush currents.
• 12.5 A current rating for industrial and electrical equipment.
• 250 V AC rated voltage for low-voltage circuit protection.
• Standard 5 × 20 mm miniature cartridge format.
• Transparent glass body allows convenient visual inspection.
• Reliable Mersen construction for maintenance and OEM applications.

Key Features

• Mersen MI5ST25V12.5 miniature cartridge fuse.
• 12.5 A rated current.
• 250 V AC rated voltage.
• Time-delay fuse characteristic.
• Standard 5 × 20 mm cartridge dimensions.
• Glass body with cylindrical metal end caps.
• Suitable for circuits with temporary inrush currents.
• Designed for installation in compatible fuse holders or fuse clips.

Time-Delay Protection for Electrical Equipment

Time-delay cartridge fuses are designed to tolerate brief current surges that occur when transformers, power supplies, motors and other inductive loads are energised. This allows normal start-up currents to pass without unnecessary fuse operation while maintaining protection against sustained overloads and short circuits.

The Mersen Z233449 combines a 12.5 A rating with compact 5 × 20 mm dimensions, making it suitable for original equipment and replacement applications. The current rating, voltage rating, operating characteristic and required breaking capacity should always be checked against the protected equipment before installation.

Typical Applications

• Industrial control panels.
• Power supplies and power conversion equipment.
• Transformers and inductive loads.
• Industrial machinery and automation systems.
• Instrumentation and monitoring equipment.
• OEM electrical and electronic assemblies.