NGT1 Semiconductor Fuse Overview
The GRL NGT1 Semiconductor Fuse is a high-performance protection component specifically designed for semiconductor devices and power electronics operating in 400V, 690V, and 1000V AC systems. With a rated current range of 63A to 250A and an impressive breaking capacity of 100kA, the NGT1 series provides fast, reliable protection against short-circuits and overload faults in demanding industrial environments.
Engineered for precision and durability, this aR-type fast-acting fuse is ideal for protecting IGBTs, SCRs, rectifiers, and other semiconductor components in motor drives, inverter systems, UPS units, and renewable energy converters. Its robust NH1 body design ensures mechanical strength and thermal stability, making it suitable for applications that demand high reliability and continuous operation.
Complying with IEC 60269-4 and GB/T 13539.4, and certified by CCC and CE, the GRL NGT1 fuse link delivers global compatibility and proven safety for industrial power systems worldwide.
NGT1 Semiconductor Fuse Features
The GRL NGT1 Semiconductor Fuse is built with a rectangular NH1-size body and uses a silver-plated fuse element enclosed within a high-strength ceramic casing filled with fine quartz sand. This structure ensures precise and rapid current interruption while maintaining excellent heat dissipation and mechanical integrity.
Key Features:
NGT1 Semiconductor Fuse Advantages
The GRL NGT1 fuse link combines fast response, high endurance, and versatile application compatibility — making it the preferred solution for industrial semiconductor protection.
1、Ultra-fast semiconductor protection
Rapid fault clearing prevents irreversible damage to IGBTs, rectifiers, and converters.
2、High thermal and mechanical strength
The ceramic housing withstands vibration and high operating temperatures typical of heavy-duty equipment.
3、International standard compliance
Certified under IEC and GB/T standards with CCC and CE approvals for worldwide use.
4、Low energy let-through (I²t)
Effectively limits peak current, minimizing energy impact on downstream circuits.
5、Energy-efficient design
Low-resistance element reduces power loss during normal operation, improving overall system efficiency.
6、Easy integration
Standard NH1 dimensions simplify installation in switchgear, inverter cabinets, and control panels.
7、Reliable under harsh conditions
Designed for long service life even under thermal cycling, vibration, and high humidity environments.
The NGT1 fuse is especially suitable for medium-current applications, such as industrial inverters, UPS modules, motor drives, and renewable energy converters, where precise protection and system uptime are crucial.
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NGT1 Semiconductor Fuse Applications
NGT1 Semiconductor Fuse FAQs
1、Can the NGT1 fuse be used in renewable energy systems?
Yes. The NGT1’s high breaking capacity (100kA) and wide voltage range (400V–1000V AC) make it perfectly suited for solar and wind inverter applications, where transient overcurrents must be cleared instantly to protect converters and grid interface equipment.
2、What does the protection category “aR” mean?
The “aR” designation indicates an auxiliary, current-limiting fuse for semiconductor device protection. In IEC terminology, aR fuses have a shorter range than gG fuses: they are intended only for semiconductor circuits. Practically, this means the NGT1 fuse is engineered to clear short-circuits rapidly (and with limited overload range), as required when protecting diodes and transistors. The NGT000’s aR rating also matches industry norms for semiconductor fuses used worldwide.
3、What are some typical installation tips?
The NGT1 should be mounted in a proper fuse holder or onto busbars using the specified torque (e.g, ~21 N·m for M10 studs). Ensure the holder or terminals are clean and the fuse is fully seated. Avoid mounting near sources of excessive vibration or heat. It’s recommended to replace a blown NGT1 only with the same type and rating to maintain protection integrity.
Need more help? For assistance with GRL semiconductor fuses or technical selection, please contact GRL support. The NGT series provides cost-effective, high-performance protection for a wide range of modern power-electronic applications.Get Quote
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