1N4744AHR0G

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	15V
Tolerance:	±5%
Power - Max:	1W
Impedance (Max) (Zzt):	14 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 11.4V
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-204AL (DO-41)

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Diodes - Zener - Single

The 1N4744AHR0G is a single Zener diode designed specifically for communications, professional and industrial electronics applications. This diode is designed to operate in the temperature range of -65°C to +175°C. It offers excellent electrical characteristics such as low surface leakage, high current density capabilities and medium-term reliability.

Application Field

The 1N4744AHR0G diode can be used in a variety of electronic applications. It can be used for voltage regulation, clipper circuits, switching applications, commercial AC line protection and EMI/RFI filtering. It can also be used in power supplies, amplifier circuits and communications equipment. It is also suitable for protection of devices such as transistorized amplifiers, linear power supplies, UPS and SMPS etc.

Working Principle

The 1N4744AHR0G diode is a Zener diode, meaning it consists of an intrinsic junction having a large reverse breakdown voltage rating. When a reverse bias is applied, the diode starts to conduct current, and the voltage across it stays relatively constant. This constant voltage can be adjusted by controlling the reverse bias voltage. When the diode is forward biased, it behaves like a normal PN junction diode, allowing current to flow from the anode to the cathode. This forward direction current follows the same behavior as a normal PN junction diode, with the voltage drop across it dependent on the current. This voltage drop causes the diode to act like a resistor, which is important in certain circuit applications.The 1N4744AHR0G can also be used in avalanche mode, which greatly increases its current handling capabilities. In this mode, the diode is reverse biased and as the voltage starts to rise, the electric field inside the diode is increased. Eventually, this electric field is strong enough to ionize the semiconductor bulk material, creating an avalanche of electrons and holes. This allows the diode to handle much higher current than it would in normal operation, making it suitable for high-power applications.

Conclusion

The 1N4744AHR0G is a single Zener diode that is suitable for use in a variety of electronic applications. It offers excellent electrical characteristics such as low surface leakage, high current density capabilities, and medium-term reliability. This diode is typically used for voltage regulation, clipper circuits, switching applications, commercial AC line protection and EMI/RFI filtering, and it can also be used in avalanche mode for higher-power applications.

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