Why Choose the ABB OFAA000AM25 25 A aM Fuse?
The ABB OFAA000AM25 is a 25 A aM HRC DIN fuse link designed specifically for short-circuit protection of motor circuits. Identified by ABB product ID 1SCA022660R8530, this compact NH000 / size 000 fuse link is rated for operation at up to 690 V AC.
Its aM utilisation category provides partial-range protection for motor circuits, allowing the fuse to interrupt high fault and short-circuit currents while a separate overload protection device protects the motor against sustained overload conditions. This makes the OFAA000AM25 suitable for coordinated motor starter assemblies incorporating contactors and overload relays.
The OFAA000AM25 has a rated breaking capacity of 80 kA and a power loss of approximately 1.2 W at rated current. ABB's OFAA fuse-link construction also incorporates dual indication, helping provide clear fuse-status indication in industrial motor-control and distribution equipment.
Key Advantages
- 25 A aM motor fuse for short-circuit protection.
- Rated for systems up to 690 V AC.
- High 80 kA breaking capacity.
- Compact NH000 / DIN size 000 construction.
- Current-limiting operation helps reduce fault energy in motor circuits.
- Dual indication assists with fuse-status identification.
- Designed to coordinate with separate motor overload protection.
- Suitable for industrial motor starters, machinery and distribution systems.
Key Features
- ABB OFAA000AM25 HRC fuse link.
- 25 A rated current.
- 690 V AC rated voltage.
- aM utilisation category for motor circuit protection.
- NH000 / DIN size 000.
- 80 kA rated breaking capacity.
- 1.2 W power loss at rated current.
- Partial-range protection against short-circuit currents.
- Dual fuse-status indication.
- Designed for use alongside dedicated motor overload protection.
High-Capacity Short-Circuit Protection for Motor Circuits
An aM fuse is specifically designed for motor circuits and provides partial-range protection rather than the complete overload and short-circuit protection associated with general-purpose fuse links. The OFAA000AM25 is therefore normally coordinated with a suitable overload relay, manual motor starter or other overload protection device.
With its 80 kA breaking capacity, the ABB OFAA000AM25 can safely interrupt substantial prospective short-circuit currents within its specified operating conditions. Its current-limiting characteristics help reduce the thermal and electrodynamic stresses imposed on downstream equipment, supporting reliable protection of contactors, conductors and other motor-control components.
Typical Applications
- Industrial motor starter circuits.
- Motor control centres.
- Pumps, fans and compressors.
- Conveyors and material handling equipment.
- Machine control and automation panels.
- Industrial power distribution systems.
