GRL NGT000 Semiconductor Fuse 690V AC Supplier for Semiconductor Equipment Protection

Model No.：

NGT000

Rated Voltage：

690V AC

Current Range：

10~315A

Breaking Capacity：

100KA

Protection Category：

Standards：

GB/T 13539.4 IEC 60269-4

Certifications：

CCC， CE, TUV

Certification Download PDF Contact Us

Description

NGT000 Semiconductor Fuse Overview

The GRL NGT000 is a fast-acting, high-capacity semiconductor fuse link designed for 690 V AC systems. It protects sensitive power-electronic equipment (IGBTs, SCRs, diodes, etc.) and their control circuits from overloads and short circuits by interrupting fault currents in milliseconds. The NGT000 series is rated for currents ranging from 10 A to 315 A, with a breaking capacity of 100 kA, meeting the IEC 60269-4 standards. It carries CCC, CE, and TUV approvals for industrial-grade reliability.

These specifications place the NGT000 among advanced “high rupturing capacity” fuses: it offers very high fault-clearing ability while keeping energy let-through (I²t) extremely low, so that connected semiconductors are protected first. The NGT000 fuse link is thus ideal for industrial power and control panels, inverter systems, UPS units, motor drives, renewable-energy inverters, and other applications involving power semiconductor devices.

NGT000 Semiconductor Fuse Technical Parameters

Model No.	Size	Rated Voltage V	Rated Current A	Rated Breaking Capacity kA
NGT000-10A	000	690	10	100
NGT000-16A	000	690	16	100
NGT000-20A	000	690	20	100
NGT000-25A	000	690	25	100
NGT000-32A	000	690	32	100
NGT000-40A	000	690	40	100
NGT000-50A	000	690	50	100
NGT000-63A	000	690	63	100
NGT000-80A	000	690	80	100
NGT000-100A	000	690	100	100
NGT000-125A	000	690	125	100
NGT000-160A	000	690	160	100
NGT000-200A	000	690	200	100
NGT000-250A	000	690	250	100
NGT000-315A	000	690	315	100

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

NGT000 Semiconductor Fuse Features

The NGT000 fuse link has a rectangular ceramic body containing a silver-alloy fuse element and quartz sand filler. The fuse element is a precision-engineered strip with “neck-down” sections that ensure very fast melting under fault conditions. The quartz filler provides excellent arc-quenching: when the element melts, it creates brief arcs that are quickly extinguished by the sand medium.
End caps and heavy-duty terminals are bolted onto the ceramic tube, forming a robust enclosure. In the standard NGT000 design, the fuse is mounted via threaded bolt studs (M10) at each end (a “bolted” connection).

Key design features include:

Ceramic housing: High-strength insulator that withstands heat and pressure.
Silver/Copper element: Low-melting, high-conductivity alloy ensures rapid fuse action and high energy absorption.
Quartz sand filler: Creates a stable extinguishing medium for the electric arc.
Compact bolt lugs: The wide, flat end lugs allow secure mounting to busbars or fuse holders.
Optional signal indicator: The NGT series can accommodate microswitch modules for blown-fuse indication.

NGT000 Semiconductor Fuse

Together, these selling points make the GRL NGT000 an excellent choice for protecting semiconductor equipment. It provides high-end, cost-effective protection in applications such as motor drives, power converters, renewable energy inverters, UPS systems, and other AC power electronics. By limiting short-circuit damage and preventing semiconductor failure, the NGT000 fuse helps maximize system uptime and reduce maintenance costs.

NGT000 Semiconductor Fuse Advantages

The GRL NGT000 fuse link offers several compelling advantages for system designers and end users:

1、Ultra-fast fault clearing

As a semiconductor-type fuse, the NGT000 interrupts short-circuits in just a few milliseconds. Its notched element and fast blow characteristic ensure that dangerous surge currents are cut off quickly, protecting thyristors, IGBTs, diodes, and other semiconductors from damage.

2、High breaking capacity

With a 100 kA interrupt rating, the fuse can safely clear very large fault currents. This high energy rating means the fuse absorbs fault energy and limits the peak current, shielding both the protected equipment and the upstream wiring.

3、Reliable performance

The engineered silver fuse element provides consistent, repeatable fusing. This high-precision design minimizes nuisance trips during normal operation while ensuring a predictable response in the event of a fault. (In other words, the fuse won’t pop from harmless surges, but will open precisely when a true overload or short occurs.)

4、Compact, rugged construction

The square cross-section and ceramic tube make the NGT000 very robust. It can withstand mechanical shocks and vibration common in industrial environments. The compact form factor saves space on busbars and in panels.

5、International compliance and safety

The NGT000 is manufactured to global standards IEC 60269-4 and carries CCC, CE, and TUV marks, giving system integrators confidence in its quality and allowing use in certified equipment. Meeting these standards also means the fuse has undergone rigorous testing for reliability and performance.

6、Easy installation and maintenance

The standard bolt-connection lugs (M10) and defined dimensions make the fuse simple to mount in holders or on busbars. During maintenance, the fuse can be quickly inspected or replaced. (A blown NGT000 fuse can be verified with a multimeter check for continuity.)

Together, these selling points make the GRL NGT000 an excellent choice for protecting semiconductor equipment. It provides high-end, cost-effective protection in applications such as motor drives, power converters, renewable energy inverters, UPS systems, and other AC power electronics. By limiting short-circuit damage and preventing semiconductor failure, the NGT000 fuse helps maximize system uptime and reduce maintenance costs.

NGT000 Semiconductor Fuse Applications

The NGT000 semiconductor fuse link is suited to a variety of industrial and commercial applications, including:

Power Electronics and Inverters: Protecting IGBTs and converters in solar/wind inverters, UPS inverters, frequency converters, and similar DC/AC systems.
Motor Control and Drives: Safeguarding variable-frequency drives and motor controllers from phase-to-phase or phase-to-ground shorts.
Industrial Distribution Panels: Used in control cabinets and panelboards for machines with sensitive electronics (robotics, automation lines, etc.).
Battery and Energy Storage: Employed in the AC side of battery chargers, inverters, and energy storage systems to interrupt faults.
Semiconductor Manufacturing: Protecting rectifiers and power supplies in wafer fab tools, CRT/semiconductor diffusers, etc.

In all these settings, the rapid action and high interrupt rating of the NGT000 enhance both safety and equipment longevity.

NGT000 Semiconductor Fuse FAQs

1、How does the NGT000 fuse protect my circuit?

Internally, the NGT000 acts like a specialized high-speed cartridge fuse. Its silver-based element has narrow, notched sections (fusing points) inside the ceramic body. Under a fault, the element heats and melts at those points, creating small arcs. The quartz sand quickly extinguishes these arcs, interrupting the current in just milliseconds.

This rapid action “blows” the fuse before downstream devices can be harmed by overcurrent.

2、How can I tell if the NGT000 fuse has blown?

First, de-energize the circuit. The simplest check is using a multimeter set to resistance: touch the probes to the fuse’s two terminals. A good fuse exhibits very low resistance (nearly 0 Ω). A blown fuse reads “OL” (open loop) or “infinite resistance,” indicating that the element is open. (Some panels may also use auxiliary microswitch indicators on the fuse base to signal a blown fuse.)

Need more help? For assistance with GRL semiconductor fuses or technical selection, please contact GRL support. The NGT000 series provides cost-effective, high-performance protection for a wide range of modern power-electronic applications.Get Quote

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