BZG05B18-HM3-18

Series:	Automotive, AEC-Q101, BZG05B-M
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±2%
Power - Max:	1.25W
Impedance (Max) (Zzt):	20 Ohms
Current - Reverse Leakage @ Vr:	500nA @ 13V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	DO-214AC, SMA
Supplier Device Package:	DO-214AC (SMA)

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Introduction to BZG05B18-HM3-18

BZG05B18-HM3-18 is a type of diode from the Zener single category, designed to regulate and protect circuits against overvoltage and transients. Unlike typical diodes, which are designed to be forward-biased, zener single diodes are designed to be reverse-biased. It is therefore possible to use them to control the rectified output of switching regulators, or as an emergency ‘resetting’ device in case of an overload.

BZG05B18-HM3-18 Application Field

The BZG05B18-HM3-18 is designed for applications such as active load balancing, dynamic load balancing and AC-DC/DC-AC voltage converters. It is suitable for use in automotive and industrial environment, as it offers high surge protection and adjustable current limit.The device can be used in any situation where electrical current must be limited and balanced. This includes battery-operated systems, circuit protection, transient protection, and integrated circuit protection.

BZG05B18-HM3-18 Working Principle

BZG05B18-HM3-18 is a Zener single diode which uses temperature-compensated reverse breakdown, operating at a constant voltage level, usually 5V. The working principle of the BZG05B18-HM3-18 is based on the theory of a constant voltage source, which provides a constant voltage output (5V) regardless of the current applied. This is achieved as the diode’s voltage is regulated through a thermal feedback mechanism in which the resistance value is adjusted to balance the load current. When the load current occurs above a certain threshold, the temperature of the diode increases and the resistance value is adjusted accordingly to maintain a constant voltage. This process is known as reverse breakdown voltage regulation.

Conclusion

The BZG05B18-HM3-18 is a single Zener diode with a constant voltage output of 5V. It offers active current balancing and dynamic load balancing, as well as AC-DC/DC-AC voltage converters. The complete device is capable of handling surge and transient events, providing effective protection for the circuit board. The device is suitable for use in industrial and automotive environments, where reliable performance is required. The BZG05B18-HM3-18 operates on the principle of temperature-compensated reverse breakdown, regulating the voltage output level as the load current rises.

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