SZBZX84C4V3LT1G

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	4.3V
Tolerance:	±7%
Power - Max:	225mW
Impedance (Max) (Zzt):	90 Ohms
Current - Reverse Leakage @ Vr:	3µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Operating Temperature:	-65°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3 (TO-236)
Base Part Number:	BZX84C4V3

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Introduction

The SZBZX84C4V3LT1G is a single Zener diode, designed to provide stable voltage regulation in a range of applications. It is a low power device with a maximum average forward current rating of 500mA, and a precision voltage regulation range of 3.8V to 4.3V. The SZBZX84C4V3LT1G has a low thermal resistance of 0.68°C/W and is designed to operate over a wide temperature range of -55°C to +150°C. It is available in various packages such as SOT-23, MELF and TO-92.

Application Fields

SZBZX84C4V3LT1G is suitable for applications that require precise voltage regulation over a wide temperature range. Common applications for Zener diodes include AC/DC adaptors, mobile phones, digital cameras, and medical equipment.The SZBZX84C4V3LT1G can be used in various applications where a stable voltage is required, such as power supplies, over-voltage protection circuits, and low-dropout voltage regulators. It can also be used in automotive and industrial applications where its high power dissipation and temperature performance make it attractive.

Working Principle

The SZBZX84C4V3LT1G is a Zener diode, and works as a voltage regulator. A Zener diode passes current in the forward direction when the applied voltage is above its Zener breakdown or reverse breakdown voltage. When the applied voltage is below the Zener breakdown voltage, the diode does not conduct, preventing the current from passing through.In the forward direction, the SZBZX84C4V3LT1G acts as a forward biased diode and passes current. However, the diode has a very low voltage drop, typically 0.25 V to 0.75 V and keeps the voltage across its terminals at a very low level. This is why the SZBZX84C4V3LT1G is an ideal device for providing precise voltage regulation.In the reverse direction, the SZBZX84C4V3LT1G operates as a Zener diode. When the reverse voltage across the diode exceeds the breakdown voltage, the diode starts conducting and the voltage across its terminals remains at the breakdown voltage, regardless of further increases in the reversevoltage applied. This helps to maintain the voltage at a constant and precise level, providing the stable regulation required in many different applications.

Conclusion

The SZBZX84C4V3LT1G is a single Zener diode that is designed to provide precise voltage regulation over a wide temperature range. It is suitable for applications such as power supplies, over-voltage protection circuits, and low-dropout voltage regulators, and has a low thermal resistance, making it ideal for automotive and industrial applications. The SZBZX84C4V3LT1G operates in two directions, as a forward biased diode and as a Zener diode, and the Zener effect allows the diode to provide stable voltage regulation with precision.

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