A5KP90A-G Circuit Protection

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Transient Voltage Suppressors (TVS) Diodes provide a rugged protection against transients voltage that may occur in a system due to electrostatic discharges, voltage surges and other causes. They are typically used as a protective device in telecommunications, consumer electronics, automotive applications, and aerospace applications.

The A5KP90A-G is a 600W, 5.0V unidirectional TVS diode with an ultra-low capacitance, 40ns unidirectional ESD protection. It features a low 13pF maximum capacitance, which makes it well suited for high-speed applications with low electromagnetic radiation. It complies with Class 4 of IEC 61000-4-2 international standard.

The A5KP90A-G is available in SOD-323 and SMA packages. The SOD-323 package provides a low-profile solution for space-constrained applications, while the SMA package offers superior EMI/RFI shielding.

In terms of its application field, the A5KP90A-G is suitable for ultra-high-speed data communication up to 8 Gbps, offering I/O port ESD protection for Gigabit Ethernet, InfiniBrand®, QSFP+, Mini SAS, USB data lines and more. It can also be used in automotive vehicles, power transition motors, stage lighting equipment, computer peripherals and other devices.

The working principle of the A5KP90A-G relies on a zener diode structure. When a transient voltage is applied to the diode, the reverse breakdown voltage is exceeded and the device gets triggered. This causes an avalanche current to flow that will allow the device to absorb the transient energy safely. The device can then return to its original, non-conductive state once the transient has ended.

Once activated, the A5KP90A-G will not conduct any further current until the voltage drops below the breakdown voltage. This feature allows it to protect a system from repeated transients without suffering any damage. Moreover, the low capacitance of the device ensures that it can reliably handle high-speed edges, making it an ideal solution for high-speed data lines.

In summary, the A5KP90A-G is a unidirectional TVS diode with an ultra-low capacitance suitable for applications up to 8 Gbps. It features a low 13pF maximum capacitance and offers I/O port ESD protection for a wide range of applications. The device is based on a zener diode structure and works by triggering an avalanche current to absorb transient energy safely.

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