SMAJ130C Circuit Protection

The SMAJ130C is a transient voltage suppressor (TVS) diode device that helps protect against the damaging effect of transient voltage spikes and surges on sensitive electronic components. TVS diode devices are typically used in automotive, industrial, and communications applications, as they offer the capability to quickly clamp any over-voltage transients that may enter a circuit. The SMAJ130C is designed to protect devices subjected up to 130 volts. The device is offered in a surface mount configuration, providing a highly automated process in system assembly.

SMAJ130C devices are usually found in automotive and industrial mobile equipment, such as medical equipment and other consumer and power electronic applications that require transient protection. Additionally, the SMAJ130C may be used in telecom and datacom equipment in order to protect against over-voltage transients.

Application Areas

The SMAJ130C is useful in a variety of applications, most notably in automotive and industrial equipment, medical systems, consumer and power supply applications, telecommunication and datacom equipment, and other space-sensitive board-level applications.

In the event of an electrical spike or surge, the SMAJ130C can effectively clamp the voltage to safely manageable levels. This helps protect delicate electronic components from permanent damage due to over-voltage, and it also prevents the connected device from exhibiting erratic or unexpected behaviour.

Operation

The SMAJ130C works on the principle of avalanche breakdown. This phenomenon occurs when the electric field around an electrically charged particle exceeds the breakdown strength of the surrounding material, causing it to break down - allowing charge to pass through it. This breakdown is further aided by the presence of a physical defect in the material, known as an avalanche site. This serves to create an area of increased carrier concentration that can further migrate charge and sustain the breakdown.

When an applied voltage exceeds the breakdown voltage of the device, the breakdown occurs and this causes electric current to flow through it. The SMAJ130C is designed to quickly trigger the avalanche breakdown and hold the voltage quickly enough to protect connected components from any permanent damage due to transient over-voltage spikes.

Conclusion

The SMAJ130C is a useful device for protecting sensitive components from damaging transients and over-voltage. Its fast triggering times and small size make it ideal for board-level applications that require transient protection. The device is available in a surface mount package for easy integration into circuit boards, and can help ensure longer lasting performance for connected devices and components.