BZD27C120PHRQG

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	120.5V
Tolerance:	±5.39%
Power - Max:	1W
Impedance (Max) (Zzt):	300 Ohms
Current - Reverse Leakage @ Vr:	1µA @ 91V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-55°C ~ 175°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	DO-219AB
Supplier Device Package:	Sub SMA

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Introduction

Zener diodes are special types of diodes, used in reverse bias configuration, which are designed to specifically break down or “ZEN” at a predetermined voltage. The BZD27C120PHRQG diode is a single-line, reverse-biased depletion-mode, Zener diode. It offers a high-temperature and high-current operation capability and is used for voltage regulation and surge suppression.

Application Field

The BZD27C120PHRQG is used in a variety of applications where accurate voltage regulation is necessary. It is commonly used in automotive, industrial and commercial electronics to provide over-voltage protection. Automobiles commonly employ Zener diodes with voltage detectors to prevent costly electrical damage caused by voltage spikes. Additionally, BZD27C120PHRQG diodes are also used to effect circuit control by sensing when external components reach their open or protection voltage limits. The BZD27C120PHRQG diode is also commonly used in motor control, power conditioning and energy storage applications, particularly those requiring low leakage current and high current carrying capacity. When a motor or pump stops, the current stored in the holding coil must be quickly discharged. The BZD27C120PHRQG ensures this discharge is safe and fast, without damaging other components in the system.

Working Principle

The primary function of the BZD27C120PHRQG diode is to provide protection for devices subjected to large amounts of current, often in the case of surges like static electricity. When reverse biased, it will break down at a predetermined voltage, allowing the flow of current to the device. When a reverse bias is applied, the BZD27C120PHRQG diode conducts electricity for a short period of time until it is discharged and can no longer do so.Once the current has passed through the device is then no longer protected and must be sealed off from the other components with a resistor. This flow of current and voltage is referred to as a Zener effect and is common in Zener diodes. The BZD27C120PHRQG offers superior voltage regulation performance due to its high power rating and fast response time.

Conclusion

The BZD27C120PHRQG is a single-line, reverse-biased depletion-mode, Zener diode offering a high temperature and high current operation capability. It is used to provide a tight voltage regulation and over-voltage protection in applications such as motor control and energy storage, while also providing surge protection in automotive and industrial electronics alike. Its working principle is based on the Zener effect, which works by breaking down at the predetermined voltage and allowing a current to pass until the current is discharged and it can no longer do so.

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