SG450

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Gas Discharge Tube Arresters (GDT), also known as spark gap arresters, are devices for the protection of valuable electronic equipment from high voltage transients or surges. These surges can arise from a variety of sources, ranging from power mains transients and lightning strikes to electrostatic discharges. SG450 is one of these types of arrester preventively discharges electrical surge from the protected equipment to ground.

The SG450 gas discharge tube arrester consists of a metallic tube containing an insulating gas held at a low-pressure, the arrester has two electrodes, a positive and a negative, with a spark gap between them. When a fault is created through the application of an excess of electricity, the spark gap starts to break down, releasing ionized particles which form a conductive path. When the path is complete, the excess electricity is grounded through the ground potential of the equipment.

The SG450 is an unidirectional, unequally-charged gas discharge tube, providing surge protection for low energy electronic equipment. Its working voltage is approximately 450V DC and its working current is 0.5A. The SG450 is designed to provide protection against low voltage, low energy transients and can be mounted in any orientation. The device is relatively small and measures in at approximately 20mm x 15mm with the capacitors and spark gap combustible mechanism located inside the tube.

The SG450 gas discharge tube arrester works by limiting the level of current and voltage that is allowed to flow within the system it is protecting. When an over-voltage occurs, the SG450’s spark gap breaks down and conducts current, creating a discharge path. Once the voltage of the over-voltage has been limited, the current is allowed to safely dissipate within the system.

The applications that require SG450 type of arrester include surge protection for low voltage and low energy electronic equipment from lightning, power mains transients, ESD electrostatic discharges, and other overvoltage transients. SG450 is widely used in home and commercial applications, including computers, modems, security and fire alarm systems, telecommunications systems, solar panels, electrical and automotive systems, and UPS systems.

The SG450 arresters can also be used to protect high-value equipment such as medical imaging systems, critical communication equipment, industrial control systems, and power delivery systems. These systems are extremely reliable and are designed for years of trouble-free operation, providing a much higher level of protection than regular surge protectors. It also provides superior isolation from ground noise and RF (radio frequency) sources.

The design of the SG450 gas discharge tube arrester is simple and extremely reliable. It is capable of handling overcurrent surges up to 450V DC, allowing the device to provide a very high level of protection for low voltage and low energy electrical systems. The device also ensures degradation-free performance which is important for high-end systems that require continuous protection.

In conclusion, SG450 arresters are designed to protect valuable electronic equipment from high voltage and transient surges that can occur due to various sources. They are suitable for a wide range of applications and provide a very high level of protection for low energy electrical systems. Their simple and reliable design, coupled with superior isolation from noise and RF sources, makes SG450 arresters an attractive and cost-effective solution for providing surge protection.

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