1SMA4761-GT3TR

The 1SMA4761-GT3TR Zener diode is a single diode that works on a voltage regulation principle. In electronics, a Zener diode is a diode that allows electric current to flow in either direction, but it will maintain a specific voltage level, regardless of the current passing through it. This regulated voltage or “Zener voltage” determines the operation of the diode and consequently its application field.

The 1SMA4761-GT3TR is designed specifically to provide a stable voltage as a power supply for Sensors, Transceivers, Radio Frequency (RF) modules, automotive electronics and other integrated circuits. The Zener voltage rating of this diode is 1.8V and its power rating is 500mW. Its nominal current is 100mA and its maximum maximum peak reverse voltage is 2.4V. It is a SOT23 package Zener diode.

1SMA4761-GT3TR Working Principle

The working principle of the 1SMA4761-GT3TR is based on the “Zener Triple Threshold Voltage Regulation”, that is, the diode regulates an input voltage to a predetermined, stable output voltage of 1.8 Volts. The control and regulation of voltage take place at three separate threshold levels – the first, second and third.

In the first stage, when the input voltage is below the first threshold the diode will not conduct. This is known as a reverse-blocking state. In the second stage, when the input voltage reaches the first threshold, the diode will begin to pass current in the reverse direction; but it is limited by the second threshold, known as the Zener voltage. When the input voltage reaches the second threshold, the diode begins to conduct at a limited rate. In the third stage, when the input voltage reaches the third threshold, it will reach the maximum conducted current or “Zener characteristics”.

Once the input voltage reaches the maximum current or the “Zener Characteristics”, it will remain there is long as the current does not exceed the maximum current. The Zener diode will act as a regulator and prevent further current from flowing unless the input voltage is increased further. This is the basis for the Zener diode’s voltage regulation.

Conclusion

The 1SMA4761-GT3TR is a single Zener diode specifically designed to regulate a specific voltage, regardless of the input voltage. The Zener voltage of this diode is 1.8 Volts and its power rating is 500mW. Its typical current is 100mA and its maximum peak reverse voltage is 2.4V. In addition, the diode operates on the Zener Triple Threshold Voltage Regulation, meaning it will regulate a voltage to a stable level at three distinct thresholds. These features make the 1SMA4761-GT3TR an ideal choice when powering circuits such as sensors, transceivers, RF modules, automotive circuits and other integrated circuits that require a regulated and stable power supply.