3KASMC36HE3/57T

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TVS (transient voltage suppressors) diodes are widely used in low power electronics industry for protecting an electronic system from high voltage transients. These devices come in many different designs and their working principle depends on their design. In this article, we will be looking at the working principle and the application field of the 3KASMC36HE3/57T transient voltage suppressor device.

Design and Structure

The 3KASMC36HE3/57T device is a unidirectional uni-polar transient voltage suppressor that works on both AC and DC sources. The device has a three-lead flat lead package and an integrated metal heat sink package, as well as an integrated EMI/RFI filter. Its structure is based on a zener diode die system, with two metal layers that provide a high-voltage, low-impedance path, and an active region at the top layer of the die system.

Working Principle

The working principle of the 3KASMC36HE3/57T device is based on the Zener diode system. When the voltage across the device exceeds the Zener voltage, the device conducts from internal to external paths, and the current is limited by the Zener diode resistance. This operation is known as Zener breakdown. The current is limited by the junction impedance of the Zener diode and the parasitic stray capacitance of the device. The device operates in the avalanche breakdown mode above the Zener voltage, with a second amplification of the current.

In the overload mode, when the voltage input exceeds the device’s rating, the path is quickly clamped. The Zener diode is then shorted and the current is limited by a Zener resistance. If the overcurrent continues, the device will be clamped to a voltage, which is far lower than its Zener voltage, thus limiting the level of transient current.

Application Field

The 3KASMC36HE3/57T device is widely used in low power applications, such as low voltage power supplies, battery systems, personal computers, and communication systems. The device is also used in high voltage applications, including industrial control, automotive, and medical equipment. The device is highly reliable and offers good surge power capabilities. The device also provides EMI/RFI filtering capabilities making it suitable for use in noisy environments.

Conclusion

The 3KASMC36HE3/57T transient voltage suppressor device is widely used in low power electronics. Its working principle is based on a Zener diode system. This device is suitable for use in low voltage power supplies, battery systems, and communication systems, as well as in high voltage industrial, automotive, and medical equipment.

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