BZX84C12-7 Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Discontinued at Digi-Key
Voltage - Zener (Nom) (Vz):	12V
Tolerance:	±5%
Power - Max:	300mW
Impedance (Max) (Zzt):	25 Ohms
Current - Reverse Leakage @ Vr:	100nA @ 8V
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3
Base Part Number:	BZX84C12

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Introduction

Diodes are a type of semiconductor which allow electrical current to flow in one direction exclusively. Zener diodes are a specific subtype of diode which are designed to provide a certain amount of reverse voltage, called zener voltage when the anode voltage exceeds a certain pre-defined voltage. The BZX84C12-7 is a Zener diode which has a Zener voltage of 5.1 volts. It is available in a hermetically sealed glass SOD-88 small outline package.

Application Field

The BZX84C12-7 is primarily used for applications which require precision and fast transient response. In these applications, reverse breakdown voltage regulation is required at a set level and the BZX84C12-7 provides an exact voltage of 5.1 volts. This makes the part ideal for use in precision measurement and control circuits. A few examples of circuits which it might be used in include voltage regulators, digital-to-analog converters, peak voltage clamping circuits and high-frequency oscillators.

Working Principle

The BZX84C12-7 works by allowing a certain amount of current to flow in the reverse direction, when the applied voltage is higher than its pre-defined reverse break-down voltage. This current is limited by the dynamic impedance and is referred to as the Zener current. The voltage at this current is called the Zener voltage, which in the case of the BZX84C12-7 is 5.1 volts. As the applied voltage increases, the Zener current increases exponentially until the current reaches a maximum set by the power dissipation rating of the part. The Zener diodes, therefore, maintain a constantly regulated voltage across it, allowing for precision control and regulation.

Characteristics

The BZX84C12-7 has a wide variety of characteristics which makes it suitable for different applications. It has a high power dissipation rating of 200 mW, which is actually quite high for a device of its size. Additionally, its typical dynamic resistance is 1.3 ohms, giving it great transient response even when the load is changing rapidly. It is also capable of operating in an ambient temperature range of -65°C to +175°C, allowing designers to work with a wide variety of materials to meet different specifications. Furthermore, it has a limited surge power rating of 62 mW, meaning it can provide short periods of high power and is ideal for use in high-frequency circuits.

Conclusion

In conclusion, the BZX84C12-7 is a Zener diode which provides a constant voltage of 5.1 volts, making it suitable for many different applications which require precise voltage regulation and signal control. It features good reverse characteristic, a high power dissipation rating, a wide temperature range of operation, and a limited surge power rating. All of these features make the BZX84C12-7 an ideal choice for a range of different applications.

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