SMA6L15A Circuit Protection

TVS - Diodes

TVS diodes are an active component used in electronic circuits for protecting other components from transients or voltage surges. They are also able to conduct current in cases where traditional zener diodes may fail. The SMA6L15A is an SMD type of TVS diode.

SMA6L15A Application Field

The SMA6L15A is designed to protect data and power lines used in communication, automotive, and industrial equipment. It can protect up to 3A of continuous current, and up to 6A when the surge is brief. The diode is able to protect circuit components from voltage surges in both directions—negative and positive. It has an operating voltage range of 5 to 30 volts, and can withstand breakdown voltages up to 40 volts.

SMA6L15A Working Principle

The SMA6L15A is a diode, the working principle of which is based on the p-n junctions of two semiconductor materials. In the absence of a voltage, the junctions are isolated and no current can flow, meaning that the semiconductor has a high resistance to the current. However, when a positive voltage is applied, the junctions are closed and current can flow. The SMA6L15A has two junctions, one of which is designed to open when an overvoltage is detected.

When an overvoltage is detected, the junction opens and the current is diverted away from the circuit’s devices, preventing them from being damaged. The SMA6L15A is designed with a reverse-biased voltage clamping, meaning that the diode blocks the current in both directions, preventing it from entering or leaving the circuit. This prevents the circuit components from being damaged by other components connected to the same supply line.

Conclusion

The SMA6L15A is a TVS diode designed to protect circuits from voltage surges and transients. It has an operating voltage range of 5-30 volts and can protect up to 3A of continuous current, and 6A during surge. The SMA6L15A is reversible biased and can protect circuits in both directions. Thus it is ideal for applications in communication, automotive and industrial equipment.