1SCA022660R8450 ABB 20 A aM Size 000 690 V Motor Fuse

Why Choose the ABB OFAA000AM20 20 A aM Fuse?

The ABB OFAA000AM20 is a 20 A aM low-voltage DIN fuse link designed specifically for short-circuit protection of motor circuits. Identified by ABB product ID 1SCA022660R8450, this size 000 fuse link is rated for operation at up to 690 V AC.

Its aM utilisation category means the fuse provides partial-range protection for motor circuits, primarily interrupting high fault and short-circuit currents while a separate overload protection device handles sustained motor overloads. This makes the OFAA000AM20 well suited to coordinated motor starter assemblies incorporating contactors and overload relays.

The OFAA000AM20 uses ABB's industrial NH/DIN fuse-link format and provides dependable current-limiting protection for machinery, motor control centres and power-distribution equipment. Its 20 A current rating and 690 V AC voltage capability support a broad range of industrial motor-protection applications.

Key Advantages

• 20 A aM motor fuse for short-circuit protection.
• Rated for systems up to 690 V AC.
• Compact DIN size 000 fuse-link format.
• Current-limiting operation helps reduce fault energy in motor circuits.
• Designed to coordinate with separate motor overload protection.
• Suitable for industrial motor starters, machinery and distribution systems.

Key Features

• ABB OFAA000AM20 fuse link.
• 20 A rated current.
• 690 V AC rated voltage.
• aM utilisation category for motor circuit protection.
• DIN size 000.
• Partial-range fuse protection for short-circuit conditions.
• Designed for use alongside dedicated motor overload protection.
• Industrial low-voltage fuse-link construction.
• Suitable for coordinated motor protection assemblies.

Short-Circuit Protection for Motor Circuits

An aM fuse is specifically intended for motor circuit protection and operates differently from a general-purpose full-range fuse. It provides protection against high fault currents but does not replace the overload relay or other overload-protection device required to protect a motor against prolonged overcurrent conditions.

The ABB OFAA000AM20 can therefore be combined with suitable contactors and motor overload protection to form a coordinated motor starter. Its current-limiting action helps interrupt severe fault currents rapidly, protecting downstream equipment and conductors from the damaging thermal and electrodynamic effects of short circuits.

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.