1.5KA47HE3/54

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TVS (Transient Voltage Suppressor) diodes are popular parts in the electronics industry because of their ability to adsorb overvoltage surges, effectively protecting a sensitive circuit from harmful electrostatic discharges (ESD). The 1.5KA47HE3/54 is a widely-used TVS component, specifically designed to effectively suppress ESD and electrical overstress (EOS) over a wide range of operating frequencies. This article provides an overview of the 1.5KA47HE3/54 application field and working principle.

The 1.5KA47HE3/54 is typically used in automotive ESD testing, as it can absorb up to 1.5kV. It is also commonly employed in many industrial and military applications. The device comes in a hermetically sealed three-lead package, with the device acting as a rectifier bridge when a surge is detected. The 1.5KA47HE3/54 is extremely reliable, with a Very Low Leakage current of less than 5 nA at room temperature and an Insulation Resistance of 80 Megaohms.

The working principle of the 1.5KA47HE3/54 is based on the Rectifier Bridge Principle. When ESD or EOS events occur, an electrical surge is sent to the device, causing the bridge to conduct high current in one direction. This direction is determined by an internal diode’s junction capacitance, which acts as a rectifier and prevents current flow in the opposite direction. The device then acts as a Zener diode and dissipates the excess energy by clamping the voltage.

The 1.5KA47HE3/54 features a Low Insertion Loss characteristic, meaning the device has a very low resistance to the current flowing through it. This ensures the surge is dissipated quickly, protecting the circuit from damage. Furthermore, it has Low Clamping Voltage, keeping the voltage between the two pins under the rated protection voltage of 14.5 V. This helps protect the circuit from ESD and EOS events.

The 1.5KA47HE3/54 also features excellent pulse waveform capability. This means it can effectively absorb ESD and EOS events with a peak power rating of 320 per line. The device is self-protecting and can handle continuous high surge or wide voltage spikes without being damaged. Furthermore, it is highly reliable and can withstand over 50,000 surges without any signs of significant wear.

In conclusion, the 1.5KA47HE3/54 is a popular TVS diode due to its high-reliability, wide frequency range, and excellent surge protection capabilities. It is ideal for automotive ESD testing, industrial applications, and military applications, as it can effectively absorb overvoltage and protect sensitive circuits from ESD and EOS events.

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