Why Choose the Mersen NH0AM50V200 NH Motor Protection Fuse?
The Mersen NH0AM50V200 is a high-performance DIN NH aM fuse-link designed to provide short-circuit protection for motors, motor starters and associated switching equipment. With a 200 A rated current, a 500 V AC voltage rating and an aM utilisation category, it is suitable for demanding industrial motor circuits where high starting currents must be accommodated without unnecessary fuse operation.
Manufactured in the standard NH0 blade-contact format, the NH0AM50V200 installs into compatible NH fuse bases and switch-fuse assemblies. Its partial-range aM characteristic is specifically designed for motor circuit protection, delivering rapid interruption of short-circuit currents while allowing normal motor starting and acceleration currents.
The fuse incorporates live gripping tags, a double visual indicator and silver-plated copper blade terminals. Its robust ceramic construction and high 120 kA AC breaking capacity provide dependable fault interruption in motor control centres, industrial switchboards and machinery installations.
Key Advantages
- Designed specifically for motor circuit short-circuit protection.
- 200 A rated current for high-current motor applications.
- 500 V AC voltage rating for industrial electrical systems.
- aM characteristic accommodates normal motor starting currents.
- 120 kA AC breaking capacity for reliable fault interruption.
- Double visual indicator supports rapid identification of an operated fuse.
Key Features
- Mersen NH aM fuse-link range.
- NH0 fuse size.
- 200 A rated current.
- 500 V AC rated voltage.
- aM partial-range motor protection characteristic.
- 120 kA maximum AC breaking capacity.
- Double visual indication system.
- Live gripping tags.
- Silver-plated copper blade terminals.
- Durable ceramic insulating body.
Reliable Short-Circuit Protection for Motor Circuits
Industrial motors can draw several times their normal operating current during starting. The Mersen NH0AM50V200 uses an aM time-current characteristic that allows these temporary starting currents to pass while rapidly interrupting severe short-circuit currents that could damage motors, contactors, cables and switching equipment.
As an aM partial-range fuse-link, the NH0AM50V200 provides short-circuit protection rather than complete overload protection. It should therefore be coordinated with a suitable overload relay, motor protection circuit breaker or electronic motor protection device to provide comprehensive protection for the motor circuit.
Typical Applications
- Industrial motor starter circuits.
- Motor control centres.
- Contactors and switching equipment.
- Industrial pumps, fans and compressors.
- Manufacturing and processing machinery.
- OEM control panels and switchgear assemblies.
