Why Choose the Mersen FR14AM69V40 Cylindrical Fuse Link?
The Mersen FR14AM69V40 is a dependable 14 × 51 mm aM cylindrical fuse link designed to protect motor circuits and associated industrial equipment against damaging short-circuit currents. Rated at 40 A and 690 V AC, it is suitable for demanding motor control, machinery and electrical distribution applications.
As an aM partial-range fuse, the FR14AM69V40 is specifically designed to withstand the temporary inrush currents produced when motors start. It provides rapid interruption of severe short-circuit faults while reducing the risk of nuisance operation during normal motor acceleration.
The fuse features a robust ceramic body and silver-plated contacts for reliable electrical performance and long service life. Its standard cylindrical dimensions allow straightforward installation in compatible 14 × 51 mm fuse holders and mounting clips within control panels, motor control centres and industrial machinery.
Key Advantages
- Reliable short-circuit protection for motor circuits.
- 40 A rated current for industrial motor applications.
- 690 V AC rated voltage for demanding electrical systems.
- High 120 kA AC breaking capacity for effective fault interruption.
- aM partial-range characteristic tolerates motor starting currents.
- Compact 14 × 51 mm cylindrical format for panel installation.
Key Features
- Mersen FR14 aM cylindrical fuse-link series.
- 40 A rated current.
- 690 V AC IEC rated voltage.
- aM motor protection characteristic.
- 120 kA AC breaking capacity.
- High current-limiting performance.
- Low thermal let-through during short-circuit faults.
- Durable ceramic insulating body.
- Silver-plated cylindrical contacts.
- Standard version supplied without a striker.
Reliable Protection for Industrial Motor Circuits
The Mersen FR14AM69V40 is engineered for circuits containing motors and other inductive loads that produce substantial starting currents. Its aM operating characteristic allows normal inrush current to pass while providing effective current limitation during serious short-circuit conditions.
Because an aM fuse provides partial-range protection, it should be coordinated with a suitable thermal overload relay, electronic overload relay or motor protection device. This combination helps protect motors, contactors, cables and associated switchgear against both overloads and short circuits.
Typical Applications
- Industrial motor starters.
- Motor control centres and switchboards.
- Direct-on-line and reversing starters.
- Pumps, fans, compressors and conveyors.
- Industrial machinery and production equipment.
- OEM control panels and automation systems.
- Transformers and other high-inrush loads.
