1SMA4737HR3G

The 1SMA4737HR3G is a Zener diode from the SMA series. It is a single device and is used for various applications. It is also known as a Voltage Regulator Diode or VDR. The series comprises of standard single phase and dual phase devices for surface mount applications.

The 1SMA4737HR3G is composed of a glass passivated Zener diode which provides superior junction properties. It also offers a high degree of electrical stability and reliability as well as excellent maximum voltage and high peak current capabilities.

Application Field

This diode can be used in a variety of applications including voltage suppression, voltage regulator and voltage controlled voltage regulator. It is especially useful in applications that require protection against over-voltage conditions. It can be used in DC-DC converters, UPS systems, data processing, telecom and AC/DC systems. It provides superior protection against reverse bias operation and over-voltage conditions due to its fast switching speed and low breakdown voltage.

It is also well-suited for use in automotive, computer and telecommunications products, as it has excellent noise immunity and EMC capabilities. This diode can also be used in power converters, LED light drivers, motor drivers and automotive systems.

Working Principle

When a voltage is applied to the 1SMA4737HR3G, it will produce a voltage above its rated value. This is known as a Zener breakdown. The rated voltage of the diode is determined by the breakdown voltage. The diode will then allow current to flow through it in the reverse direction. This causes the voltage to reduce and the diode to become forward biased. The voltage across the diode is then equal to the breakdown voltage.

When the voltage is below the breakdown voltage, the diode will not conduct current. This is known as a Zener clamping effect. The 1SMA4737HR3G provides a clamping voltage that is equal to the breakdown voltage. This makes it useful for preventing over-voltage conditions in applications such as DC-DC converters and UPS systems.

In addition, the 1SMA4737HR3G has a fast switching speed and low leakage current. This makes it suitable for use in high frequency applications. It also has a low dynamic impedance, which helps to reduce harmonic distortion.

The 1SMA4737HR3G is an excellent choice for a variety of applications due to its fast switching speed, low leakage current, low dynamic impedance, and excellent noise immunity and EMC capabilities. It can be used in a variety of voltage regulator, voltage suppression, and voltage controlled voltage regulator applications. It is especially useful for applications that require protection against over-voltage conditions.