1PGSMA4747HM2G

Series:	Automotive, AEC-Q101
Part Status:	Active
Voltage - Zener (Nom) (Vz):	20V
Tolerance:	±5%
Power - Max:	1.25W
Impedance (Max) (Zzt):	22 Ohms
Current - Reverse Leakage @ Vr:	1µA @ 15.2V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-55°C ~ 175°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	DO-214AC, SMA
Supplier Device Package:	DO-214AC (SMA)

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Diodes - Zener - Single: 1PGSMA4747HM2G Application Field and Working Principle

Diodes - Zener - Single, specifically 1PGSMA4747HM2G, are widely used for various types of applications, such as providing protection in the input and power supply lines, stabilizing the current in the CMOS circuits and curbing parasitic oscillations. This article will explain the application field and working principle of 1PGSMA4747HM2G diodes.1PGSMA4747HM2G diodes are mostly used in power supplies, in order to limit and regulate voltage spikes as well as to protect sensitive components from potential damage due to overvoltage and current overload. They are also used in circuits where the current must be precisely regulated. These diodes act as a voltage reference, that is, when the voltage rises above its set threshold, the current changes its flow direction or limits the output current accordingly.The working principle of 1PGSMA4747HM2G diodes is based on the Zener effect, which can be explained as follows: when an electric field is applied across a cathode-anode PN junction, the electric field deforms the bonds between the atoms, resulting in an electron transition between the two layers. This induces a voltage in the junction, and this voltage is known as the Zener voltage. This effect is achievable only when the zener voltage reaches a certain level, called the Reverse Breakdown Voltage.When this voltage is surpassed, the current passes through the diode in the opposite direction, generating a very small voltage drop across the junction. This voltage is known as the forward voltage, and it is usually kept very low in order to limit the current passing through the diode.When the 1PGSMA4747HM2G diode is connected in reverse mode, it is subjected to a voltage higher than its reverse breakdown voltage, allowing a small current to flow through it and providing voltage stabilization to the circuit. On the other hand, when the 1PGSMA4747HM2G diode is connected in reverse mode, the forward voltage drop across the diode’s junction will limit the current passing through it.In general, 1PGSMA4747HM2G diodes are used for various applications where voltage regulation, overvoltage protection, and current limiting are needed. They are most often used in power supplies, voltage regulators, modulators, damping circuits, compensators and other high-precision circuitry.In conclusion, 1PGSMA4747HM2G diodes are most suitable for applications which require voltage stabilization and limiting, as the Zener effect allows for these functions to be achieved with very low voltage drop. Their working principle is based on the Zener effect and its reverse breakdown voltage, which allows for very small current passing through the diode when connected in reverse mode. Additionally, they are often used in power supplies, voltage regulators and other critical applications where overvoltage protection or current limiting is needed.

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