Why Choose the ABB OFAA2AM400 400A aM Motor DIN Fuse Link?
The ABB OFAA2AM400 is a high-performance 400 A HRC DIN fuse link designed for short-circuit protection of motors and associated industrial electrical equipment. Part of ABB’s OFAA range of DIN-type fuse links, it features an aM utilisation category specifically suited to motor circuits where starting currents must be accommodated without unnecessary fuse operation.
With a rated current of 400 A and a rated voltage of 690 V AC, the OFAA2AM400 is suitable for demanding motor-control and industrial power applications. Its aM characteristic provides short-circuit protection and is intended to be coordinated with a separate overload protection device for complete motor protection.
The NH2 / size 2 DIN format allows integration with compatible industrial fuse bases, fuse holders and switch-fuse equipment. The OFAA2AM400 also incorporates dual indication, helping provide clear fuse status indication in industrial installations.
Key Advantages
- Purpose-designed aM fuse link for motor circuit protection.
- 400 A rated current for high-current industrial motor applications.
- Rated for systems up to 690 V AC.
- NH2 / size 2 DIN-format construction.
- Designed to withstand normal motor starting currents while providing short-circuit protection.
- Dual indication for convenient fuse status identification.
Key Features
- ABB OFAA DIN-type HRC fuse link.
- 400 A rated current.
- 690 V AC rated voltage.
- aM utilisation category for motor circuit protection.
- NH2 / size 2 fuse format.
- 29.7 W power loss at rated current.
- Dual fuse indication.
- Robust industrial construction for demanding motor-control applications.
Reliable Protection for High-Current Motor Circuits
aM fuse links are specifically designed for motor circuits, where they provide protection against short-circuit currents while tolerating the temporary high currents associated with motor starting. They are normally coordinated with thermal overload relays, electronic motor protection devices or other suitable overload protection equipment.
The ABB OFAA range uses established DIN-type NH fuse construction for straightforward integration into industrial fusegear. With its 400 A current rating, 690 V AC capability and NH2 format, the OFAA2AM400 is particularly suitable for protecting high-power motor circuits in industrial installations.
Typical Applications
- High-current industrial motor circuits.
- Motor control centres and electrical switchboards.
- Large pumps, fans and compressor systems.
- Conveyors and material handling equipment.
- Industrial processing and manufacturing machinery.
- Fuse-base and switch-fuse assemblies for motor protection.
