MERSEN FUSE 500V CP 14X51 AM 40A S/I FR14AM50V40

Why Choose the Mersen FR14AM50V40 Cylindrical Fuse-Link?

The Mersen FR14AM50V40 is a high-performance aM cylindrical fuse-link designed to provide dependable short-circuit protection for motors, motor starters and associated industrial electrical equipment. Part of the Mersen 14 × 51 mm ferrule fuse-link range, it is rated for circuits operating at up to 500 V AC.

Its aM partial-range operating characteristic enables the fuse-link to withstand the temporary inrush currents produced during motor starting while responding rapidly to damaging short-circuit currents. As an aM fuse does not provide full overload protection, it should be coordinated with a suitable thermal overload relay, electronic motor protection device or equivalent protective component.

With a rated current of 40 A, a standard 14 × 51 mm cylindrical format and a high breaking capacity of 120 kA, the FR14AM50V40 is well suited to motor control panels, industrial machinery and automation systems. Its ceramic body and silver-plated contacts provide reliable electrical performance in demanding operating environments.

Key Advantages

• Designed specifically for motor circuit short-circuit protection.
• 40 A rated current for industrial motor applications.
• 500 V AC rated voltage.
• aM partial-range characteristic accommodates normal motor starting currents.
• High 120 kA breaking capacity for effective fault interruption.
• Standard 14 × 51 mm cylindrical format.
• Current-limiting performance helps reduce thermal and mechanical fault stress.
• Ceramic body and silver-plated contacts support long-term reliability.

Key Features

• Mersen FR14AM50V40 cylindrical fuse-link.
• aM utilisation category.
• 40 A rated current.
• 500 V AC rated voltage.
• 14 × 51 mm fuse size.
• 120 kA AC breaking capacity.
• Partial-range protection against short-circuit currents.
• Designed to tolerate normal motor starting current.
• Ceramic fuse body construction.
• Silver-plated ferrule contacts.

Reliable Short-Circuit Protection for Motor Circuits

The Mersen FR14AM50V40 limits and interrupts high fault currents before they can cause severe damage to motors, contactors, cables and associated control equipment. Its current-limiting design reduces the electrical energy passed through the circuit during a short circuit, helping minimise damage and equipment downtime.

Because the FR14AM50V40 is an aM partial-range fuse-link, it must be used with a separate overload protection device. When correctly coordinated, this arrangement provides effective motor protection while allowing the elevated current required during normal starting conditions.

Typical Applications

• Motor starters and contactor assemblies.
• Industrial motor control panels.
• Motor control centres.
• Pumps, fans and conveyor systems.
• Manufacturing and processing machinery.
• Industrial automation equipment.
• OEM machine-building applications.
• Electrical switchgear and control systems.