MERSEN FUSE 690V CP 14X51 AM 25A S/I FR14AM69V25

Why Choose the Mersen FR14AM69V25 Cylindrical Fuse Link?

The Mersen FR14AM69V25 is a high-performance 14 × 51 mm aM cylindrical fuse link designed to provide reliable short-circuit protection for motor circuits, industrial switchgear and electrical equipment with high starting currents. Part of the established Mersen FR14 aM ferrule fuse series, it combines effective current limitation with dependable operation in demanding industrial environments.

Its aM operating characteristic allows normal motor starting currents to pass while interrupting unacceptable short-circuit currents before they can cause serious damage to contactors, cables and connected equipment. As an aM partial-range fuse, it should be coordinated with a suitable thermal or electronic overload relay to provide complete motor circuit protection.

With a rated current of 25 A, a rated voltage of 690 V AC and a high breaking capacity of 120 kA, the FR14AM69V25 is suitable for motor starters, machinery, control panels and industrial distribution systems. Its compact non-striker format fits compatible 14 × 51 mm cylindrical fuse holders.

Key Advantages

• Purpose-designed aM fuse link for motor circuit protection.
• 25 A rated current for industrial motors and inductive loads.
• 690 V AC IEC rating for demanding electrical systems.
• High 120 kA breaking capacity for dependable fault interruption.
• Allows normal motor starting and equipment inrush currents to pass.
• High current limitation and low thermal let-through during short circuits.

Key Features

• Mersen FR14 aM ferrule fuse series.
• 14 × 51 mm cylindrical fuse link.
• 25 A rated current.
• 690 V AC rated voltage.
• aM partial-range motor protection characteristic.
• Non-striker configuration.
• Ceramic insulating body.
• Silver-plated copper ferrule contacts.

Reliable Short-Circuit Protection for Motor Circuits

The Mersen FR14AM69V25 is engineered to protect motor circuits and associated switchgear against damaging short-circuit currents. Its aM time-current characteristic tolerates the temporary inrush current produced during motor starting while providing effective current limitation when a serious fault occurs.

Because the FR14AM69V25 is a partial-range fuse, it primarily protects against short circuits rather than sustained overloads. It should therefore be installed as part of a coordinated motor protection system incorporating a correctly selected overload relay or equivalent protective device.

Typical Applications

• Industrial motor starter circuits.
• Motor control centres.
• Three-phase motor circuits.
• Industrial machinery and production equipment.
• OEM electrical control panels.
• Switchgear and automation systems.