1SMA5918BT3

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Zener (Nom) (Vz):	5.1V
Tolerance:	±5%
Power - Max:	1.5W
Impedance (Max) (Zzt):	4 Ohms
Current - Reverse Leakage @ Vr:	2.5µA @ 2V
Voltage - Forward (Vf) (Max) @ If:	1.5V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	DO-214AC, SMA
Supplier Device Package:	SMA
Base Part Number:	SMA5918

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Diodes – Zener – Single – 1SMA5918BT3 application field and working principle

The 1SMA5918BT3 is a zener diode, a modern semiconductor device designed to protect circuits from high-voltage transients in power supplies and other areas of electrical engineering. In this article we will discuss what an 1SMA5918BT3 is, its application field, and its working principle.A Zener diode, or breakdown diode, is a type of semiconductor device that is used for stabilizing voltage levels in systems. It is designed to allow a voltage to be actively regulated by applying a reverse potential to the diode, or by regulating the amount of forward current flowing through the diode. The main application of a zener diode is in circuit protection and voltage stabilization. Since the voltage over a zener diode remains relatively constant over a wide range of currents, this type of device can be used as a voltage reference in many applications.The 1SMA5918BT3 is an ultrafast, small signal zener diode designed for high-speed, large current applications. It has a standoff voltage of 18 volts and an operating temperature range of -40 to 125 degrees Celsius. The device is designed to provide over-voltage protection and voltage regulation in power supplies, communications systems, and other low voltage applications.The main distinguishing feature of this diode is its ultrafast response time. It can respond to high-voltage transients within nanoseconds, providing swift protection for power supplies and other systems. Furthermore, the 1SMA5918BT3 has a wide range of current ratings, allowing it to be used in a variety of applications. It has a maximum forward voltage of 1.0V and a maximum reverse current of 25mA.The working principle behind the 1SMA5918BT3 is similar to that of any other zener diode. It is designed to regulate the voltage across the diode by allowing a reverse current of electrons to flow through its reverse electrode when the voltage across the diode exceeds its breakdown voltage. This in turn causes the voltage across the diode to remain relatively constant over a wide range of currents. The 1SMA5918BT3 also has an integrated current protection feature which will limit the current that can pass through the diode in the event of a short circuit. In conclusion, the 1SMA5918BT3 is an ultrafast, small signal zener diode that is designed to provide over-voltage protection and voltage regulation in power supplies, communications systems, and other low voltage applications. It is a versatile device that is well suited for high-speed, high-power applications due to its fast response time and wide range of current ratings. The diode functions by allowing a reverse current of electrons to flow through its reverse electrode to regulate the voltage across the diode when the voltage across the diode exceeds its breakdown voltage. This ensures that the voltage across the diode remains relatively constant over a wide range of currents.

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