1N755A BK

Introduction

1N755A BK is a single zener diode primarily used in applications requiring a low power, low current noise and low voltage drop. The diode can also be used as a reverse protection device, when the voltage across the diode exceeds the zener voltage.
This diode is a single line of 1N755A BK multi-stripe Zener Diodes. The one-piece part offers a compact footprint for the user and its zener characteristics, low electricity noise and low voltage drop are beneficial in a variety of applications.

Applications

1N755A BK is most commonly used as a low power, low current noise, low voltage drop diode. It is an excellent choice for applications requiring a reverse protection device. It is utilized in the communications, consumer electronics, industrial and medical markets.

• Low Voltage Drop – 1N755A BK has a low voltage drop of approximately 82 mV at 1.5 mA maximum.
• Power Dissipation – The diode’s power dissipation is 3.2 mW at a maximum of 1.5 mA.
• Reverse Protection – The diode is highly suitable for reverse protection over a wide current range.
• Low Current Drain – The diode has a low current drain of <200µA.

These features make 1N755A BK particularly suitable for a variety of applications, such as interface protection, current-limiting resistor replacement, switching power supplies, overvoltage protection, motor control and more.

Working Principle

The 1N755A BK is a standard Zener diode. A Zener diode is a special type of diode designed to operate in the reverse bias voltage. Unlike a normal diode that blocks current in reverse bias, the Zener diode allows a small amount of current to flow in reverse bias. The Zener diode works on the principle of avalanche breakdown.

In an uncharged condition, the junction barrier of a Zener diode is thick and has a large barrier potential. As voltage is applied in the reverse direction, electrons gain more energy and start to break the neighbouring covalent bonds. This phenomenon is known as the avalanche breakdown. When the Zener diode reaches its ‘Zener voltage’, a narrow region of the junction is abruptly heavily doped known as a Zener breakdown. This breakdown causes a small portion of current to flow across the junction in the reverse bias. The Zener voltage is usually less than 5V and it is a fixed value.

Conclusion

Overall, 1N755A BK is an ideal choice for applications requiring a low power, low current noise, and low voltage drop diode. Its zener characteristics, reverse protection and low current drain make it an excellent choice for applications such as interface protection, current-limiting resistor replacement, switching power supplies, overvoltage protection, motor control and more.