MERSEN FUSE 400V FA 0,63 A 5.20 MI5FA40V0,63

Why Choose the Mersen J093319 High-Speed Miniature Fuse?

The Mersen J093319, also identified by the catalogue number MI5FA40V0.63, is a compact high-speed semiconductor miniature fuse designed to protect sensitive electronic components against damaging overcurrents and short circuits. It forms part of Mersen’s FA range of 5 × 20 mm semiconductor protection fuses.

Its very fast-acting FA characteristic enables the fuse to interrupt excessive current rapidly, helping to limit the electrical energy transferred to semiconductor devices and associated circuitry. This fast response makes the J093319 suitable for applications where conventional general-purpose fuses may not operate quickly enough to protect sensitive electronic components.

With a rated current of 0.63 A, a rated voltage of 400 V AC and a compact 5 × 20 mm cartridge format, the J093319 provides dependable protection while occupying minimal installation space. Its ferrule terminals allow straightforward clip mounting in compatible fuse holders.

Key Advantages

• Very fast-acting FA characteristic for semiconductor protection.
• 0.63 A rated current for sensitive low-current circuits.
• 400 V AC voltage rating for compatible electronic equipment.
• Compact 5 × 20 mm cylindrical cartridge format.
• Very high breaking capacity supports dependable fault interruption.
• Clip-mounted construction enables straightforward replacement.

Key Features

• Mersen FA semiconductor miniature fuse series.
• Catalogue number: MI5FA40V0.63.
• 0.63 A rated current.
• 400 V AC rated voltage.
• High-speed, very fast-acting operating characteristic.
• Compact 5 × 20 mm cartridge design.
• Ferrule terminals for compatible fuse clips and holders.
• Designed for overcurrent and short-circuit protection.

Fast Protection for Sensitive Electronic Components

Semiconductor devices can be damaged rapidly when exposed to excessive fault current. The Mersen J093319 uses a very fast-acting fuse element to disconnect the circuit quickly, helping to reduce the fault energy reaching protected components and minimise the risk of equipment damage.

Its compact 5 × 20 mm cartridge fits compatible fuse clips and holders, making it suitable for industrial control equipment, electronic assemblies and power conversion systems. The replaceable clip-mounted format also supports straightforward inspection and maintenance.

Typical Applications

• Semiconductor device protection.
• Industrial control and automation equipment.
• Electronic power supplies and control modules.
• Power conversion and rectifier circuits.
• Instrumentation and measurement equipment.
• Printed circuit and electronic assemblies.