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.
