1SMB5939 M4G

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	39V
Tolerance:	±5%
Power - Max:	3W
Impedance (Max) (Zzt):	45 Ohms
Current - Reverse Leakage @ Vr:	1µA @ 29.7V
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	DO-214AA, SMB
Supplier Device Package:	DO-214AA (SMB)

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Diodes - Zener - Single: 1SMB5939 M4G Application Field and Working Principle

The 1SMB5939 M4G Zener diode is a single diode designed for legal and regulatory applications, such as FCC and UL approvals. In general, it provides power resistor biasing and can regulate voltage in the presence of power transients. It is composed of a body and two electrodes – an anode and a cathode – and finds use in many different fields. This article will discuss the application field and working principle of the 1SMB5939 M4G.

Application Field

The 1SMB5939 M4G Zener diode is suited for a wide variety of applications, including power supplies, power line regulation, voltage regulation, and over-voltage clamping. It is commonly used in the following areas:

• Switching & DC/DC controllers: The 1SMB5939 M4G is suitable for applications with high voltage (up to 5kV) and low power, such as DC/DC controllers. It offers excellent voltage regulation, providing power to the load without compromising system stability.
• Telecommunications & data Center Applications: The diode is designed to provide protection against surge voltages that can occur in telecommunications and data center applications. This ensures reliable and stable operation of the system.
• Automotive Electronics: The 1SMB5939 M4G can be used in automotive electronics to provide over-voltage protection, voltage regulation, and transient voltage protection.
• Thermal Management: The diode also finds use in thermal management applications, where it can provide temperature regulation and optimal cooling of the system.

Working Principle

The 1SMB5939 M4G Zener diode is constructed with a body and two electrodes – an anode and a cathode. It operates on the principle of reverse breakdown. When the voltage applied to the diode is greater than its breakdown voltage, the diode enters the breakdown region. In the breakdown region, the diode’s electrical resistance drastically lowers and current begins to flow through the diode in the reverse direction. During this reverse breakdown, the diode regulates the voltage, providing a stable source of power to the load.In addition to its voltage regulation capabilities, the 1SMB5939 M4G has excellent transient response. This allows the diode to clamp voltage spikes and provide protection against over-voltage. The diode has a low saturation voltage, allowing it to reliably regulate voltage even in the presence of power transients.The 1SMB5939 M4G Zener diode is designed for legal and regulatory applications, such as FCC and UL approvals. It is capable of power resistor biasing and voltage regulation in the presence of power transients. Its wide range of applications, such as switching and DC/DC controllers, telecommunications and data center applications, automotive electronics, and thermal management, make it a reliable and versatile component. The diode\'s excellent transient response provides protection against over-voltage. This makes it a viable option for both commercial and industrial applications.

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