SMC3K51CAHM3/57

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

TVS diodes are a class of devices used for protection from electrical transients, most commonly caused by lightning and electrostatic discharge. The SMC3K51CAHM3/57 is a Transient Voltage Suppressor (TVS) diode, designed for transient protection in power and data detection circuits. It is a mono-directional, unidirectional SMC-package assembly with a breakdown voltage of 51 volts.

Application Field

SMC3K51CAHM3/57 TVS diodes are commonly used in application such as the protection of integrated circuits (ICs) in computer and electronic devices from Electrostatic Discharge (ESD) and other destructive transients. These diodes serve to protect against voltage spikes which are capable of jeopardizing the functionality of the device. The SMC3K51CAHM3/57 is most commonly used in automotive circuits and other devices such as PCMCIA cards, modems and ADSL, USB ports, PCs, laptops, cell phones, iPods, DVD players, satellite receivers, and HDTVs.

Working Principle

A TVS diode is a form of transient suppression device that protects against over-voltage transients through the application of a zener-like voltage reference. The device utilizes the principle of avalanche breakdown, allowing the TVS to clamp transient voltages and thus protect the circuit from over-voltage spikes created by electrical transients, such as lightning. The SMC3K51CAHM3/57 has two diodes, allowing the device to be used in a bi-directional configuration. The intrinsic breakdown voltage of the SMC3K51CAHM3/57 is 51V, and its peak pulse power is 57W.

The working principle of the SMC3K51CAHM3/57 is straightforward. When the transient voltage reaches the breakdown voltage of the diode (51V in this device), the external circuit modulates the current flow in such a way that it efficiently dissipates the transient energy, clamps the voltage at the breakdown level, and almost instantaneously restores circuit conditions. This protective mechanism largely depends on the device’s dynamic resistance (also known as clamping impedance). The dynamic resistance is the ratio between the overvoltage and the forward current of the diode, and it dictates the effectiveness of the device in controlling the clamping voltage.

The SMC3K51CAHM3/57 TVS diode is designed to clamp transient events with an amplifying level of 100A. This provides efficient protection against destructive damaging currents, making the device an excellent choice for transient voltage suppression. The SMC3K51CAHM3/57 has a peak pulse power of 57W and a typical thermal resistance junction-to-case of 200°C/W.

Conclusion

The SMC3K51CAHM3/57 TVS diode is an effective and reliable device, designed to protect circuits from destructive transient events. The device is commonly found in automotive, PCMCIA, USB, laptop, cell phone, and HDTV applications, and its amplifying clamping at 100A makes it a reliable choice for voltage suppression. The SMC3K51CAHM3/57 has a breakdown voltage of 51V and a peak pulse power of 57W, making it an ideal choice for the protection of sensitive circuits in an ever-increasingly electrically hostile environment.

The specific data is subject to PDF, and the above content is for reference