SMBG4751E3/TR13

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Zener (Nom) (Vz):	30V
Tolerance:	±10%
Power - Max:	2W
Impedance (Max) (Zzt):	40 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 22.8V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	DO-215AA, SMB Gull Wing
Supplier Device Package:	SMBG (DO-215AA)
Base Part Number:	SMBG4751

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Diodes play a crucial role in electronic circuits to regulate the flow of current in a single direction. Among the various types of diodes, Zener diodes are specifically designed to remain in a reverse breakdown region of operation to regulate voltage within a circuit, thereby maintaining a stable regulation of operation.

The SMBG4751E3/TR13 is a single Zener diode built in a small SOD-323F package. It is designed to provide constant voltage regulation and a protection against transients such as electrostatic discharge. This particular diode, when activated, is capable of regulating voltage up to 5.1V and is capable of handling a surge current of up to 5.0A.

This device works on the principle of avalanche breakdown. Inside an n-type semiconductor material, which is the most commonly used for a Zener diode, electrons are more mobile than holes. When an electric field is applied, electrons will be accelerated and can eventually reach enough speeds to cause ionization. This phenomenon is known as avalanche breakdown, and it is the basis for the functionality of the SMBG4751E3/TR13.

The avalanche breakdown causes the formation of electron-hole pairs, which gives rise to an increased reverse current which is seen as a exponential increase in voltage. This increase in the reverse current remains constant, allowing for a very tight regulation of voltage at a very low cost. This is especially useful in prototyping projects and lower cost designs where simplicity is essential.

The avalanche breakdown also reduces the effects of electrostatic discharge from entering sensitive parts of the circuit. It acts as a protection mechanism and can dissipate the charge without damaging delicate components. This makes the SMBG4751E3/TR13 suitable for a variety of applications in which safety and protection against transients is essential.

The SMBG4751E3/TR13 is commonly used in a variety of applications involving voltage regulation, such as power supplies, converters, voltage references, voltage multipliers, and current regulators. Moreover, its reverse breakdown capability makes it especially suitable for use in automotive, industrial, and medical equipment, as well as in data acquisition systems.

In summary, the SMBG4751E3/TR13 is a single Zener diode packaged in a SOD-323F form factor and is designed to provide voltage regulation and protection against transients. It is capable of regulating a voltage up to 5.1V and performs at a surge current of up to 5.0A. It is used in applications involving voltage regulation, as well as in automotive, industrial and medical equipment.

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