GRL NGT3 Ultra-Rapid Power Semiconductor Protection Fuse AC 400V 690V 1000V 200-800A Supplier

Model No.：

NGT3

Rated Voltage：

400V / 690V / 1000V

Current Range：

200-800A

Breaking Capacity：

100kA

Protection Category：

aR (Semiconductor Fuse)

Standards：

IEC 60269-4, GB/T 13539.4

Certifications：

CCC, CE, TUV

Certification Contact Us

Description

NGT3 Semiconductor Protection Fuse Overview

The GRL NGT3 High-Speed Semiconductor Fuse is an industrial-grade, ultra-rapid protection device engineered for semiconductor applications in 400V, 690V, and 1000V AC systems. With a rated current range of 200A to 800A and a breaking capacity up to 100kA, the NGT3 ensures fast, dependable fault interruption in high-power converters, wind turbine inverters, and energy storage systems.

Belonging to the aR fuse category, this Power Semiconductor Protection Fuse reacts in microseconds to overcurrents, safeguarding sensitive semiconductor components like IGBTs, SCRs, and diodes from catastrophic failure. It conforms to IEC 60269-4 and GB/T 13539.4 standards and carries CCC, CE, and TUV certifications, making it a trusted choice for global power electronics and renewable energy applications.

NGT3 Semiconductor Protection Fuse Technical Parameters

Model No.	Size	Rated Voltage (V)	Rated Current (A)	Rated Breaking Capacity (kA)
NGT3-400/200A	3	400	200	100
NGT3-400/250A	3	400	250	100
NGT3-400/280A	3	400	280	100
NGT3-400/315A	3	400	315	100
NGT3-400/355A	3	400	355	100
NGT3-400/400A	3	400	400	100
NGT3-400/450A	3	400	450	100
NGT3-400/500A	3	400	500	100
NGT3-400/560A	3	400	560	100
NGT3-400/630A	3	400	630	100
NGT3-400/710A	3	400	710	100
NGT3-400/800A	3	400	800	100
NGT3-690/400A	3	690	400	100
NGT3-690/450A	3	690	450	100
NGT3-690/500A	3	690	500	100
NGT3-690/560A	3	690	560	100
NGT3-690/630A	3	690	630	100
NGT3-690/710A	3	690	710	100
NGT3-690/800A	3	690	800	100
NGT3-1000/200A	3	1,000	200	100
NGT3-1000/250A	3	1,000	250	100
NGT3-1000/280A	3	1,000	280	100
NGT3-1000/315A	3	1,000	315	100
NGT3-1000/355A	3	1,000	355	100
NGT3-1000/400A	3	1,000	400	100
NGT3-1000/450A	3	1,000	450	100
NGT3-1000/500A	3	1,000	500	100
NGT3-1000/560A	3	1,000	560	100
NGT3-1000/630A	3	1,000	630	100

Click to read： How do semiconductor fuse links protect against short-circuit conditions?

NGT3 Semiconductor Protection Fuse Features

The NGT3 Ultra-Rapid Semiconductor Fuse adopts the NH3-size standard for high-current applications. It features a ceramic body with a silver fuse element surrounded by high-purity quartz sand to deliver superior arc-quenching and current-limiting performance.

Key Structural Features:

NH3 Standardized Dimensions: Compatible with NH fuse bases and isolator switches.
Silver-Plated Element: Provides fast, stable fusing with low resistance.
Quartz Sand Arc Quenching: Rapidly extinguishes arcs under short-circuit conditions.
Ceramic Housing: Offers excellent thermal endurance and mechanical robustness.
Bolt Terminals: Ensure reliable, low-loss electrical connections.
Heat-Resistant Design: Withstands repetitive surge currents in high-power systems.

Together, these features ensure reliable performance and long-term stability in demanding industrial, renewable, and storage energy applications.

GRL NGT3 Ultra-Rapid Power Semiconductor Protection Fuse

GRL Group

NGT3 Semiconductor Protection Fuse Advantages

Ultra-Rapid Semiconductor Protection: Clears short-circuit faults in milliseconds, minimizing I²t energy and semiconductor stress.
High-Speed Fault Interruption: Engineered for IGBT, SCR, and diode protection in modern inverter systems.
100kA High Breaking Capacity: Safe fault clearing even under extreme current conditions.
Global Compliance: Certified by CCC, CE, and TUV, meeting international performance and safety standards.
Optimized for Power Electronics: Ideal for converters, drives, and DC/AC energy storage inverters.
Durable and Reliable: Maintains stability under heat, vibration, and mechanical stress.
Easy Maintenance: NH3 size design simplifies installation and replacement.
Low Power Loss: Energy-efficient element design reduces heat and improves lifespan.

The NGT3 series, combined with the NH fuse platform, offers comprehensive protection coverage for industrial power distribution, renewable conversion systems, and semiconductor equipment.

NGT3 Semiconductor Protection Fuse Applications

The GRL NGT3 fuse is designed for high-current, high-power electrical systems, providing unmatched protection in the following areas:

Renewable Energy Systems: Solar and wind turbine inverters, hybrid converters.
Energy Storage Systems (ESS): Battery inverter and DC link protection.
Industrial Drives and Converters: High-current motor drives and control cabinets.
UPS and Power Backup Systems: Rapid fault isolation for uninterruptible power supplies.
Power Semiconductor Devices: Protection for IGBTs, SCRs, and rectifiers in power modules.

In combination with GRL’s NH fuse technology, the NGT3 ensures both fast-acting performance and safe isolation across a broad spectrum of power electronics.

NGT3 Semiconductor Protection Fuse FAQs

1、What is the difference between a semiconductor fuse and an HRC fuse?

A semiconductor fuse (like GRL NGT3) is a high-speed, ultra-rapid fuse designed to protect semiconductor devices such as IGBTs and diodes. It interrupts the current in microseconds to prevent damage to sensitive components. In contrast, HRC (High Rupturing Capacity) fuses are general-purpose protection devices that operate more slowly and are used in broader electrical circuits.

2、What is an IGBT protection fuse, and how does it work?

An IGBT protection fuse like the NGT3 is designed to clear overcurrents before the IGBT’s junction overheats. The NGT3’s ultra-rapid fuse element and low I²t design interrupt short circuits instantly, preserving semiconductor integrity and ensuring long equipment life.

Download Datasheet

For detailed time-current curves, electrical characteristics, and dimensional drawings, please download the GRL NGT Semiconductor Fuse Datasheet.
For OEM inquiries or technical support, contact GRL Electric — your partner in high-performance electrical protection.

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