2EZ170D5/TR8

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Zener (Nom) (Vz):	170V
Tolerance:	±5%
Power - Max:	2W
Impedance (Max) (Zzt):	675 Ohms
Current - Reverse Leakage @ Vr:	500nA @ 130.4V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-204AL (DO-41)
Base Part Number:	2EZ170

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The 2EZ170D5/TR8 is a single zener diode that features an exceptionally low VZ of 170V, an exceptionally high ZZT of 2W, and an exceptionally moderate package size of 5.2mm by 3.2mm; making it an ideal solution for many different applications. Here, we will discuss its application field and working principle.

Application Field

The 2EZ170D5/TR8 is an excellent choice for a multitude of applications, such as over-voltage protection, gate isolation, reverse circuit protection, reference voltage stabilization, low-voltage clamping, and lightning protection. Due to its extremely low forward voltage drop, it can also be used in backlight control units and battery protection circuits. In addition, it can be used in 5V, 7V, and 12V power supply circuits.

Working Principle

The 2EZ170D5/TR8 operates using a simple principle. When forward voltage is applied to the diode, the electrons flow freely in the forward direction and the diode acts as a closed switch. When the voltage across the diode is greater than the “breakdown voltage” (also known as the “zener voltage”) the electrons experience a reverse bias which reduces the flow through the diode. This reduces the current, causing a drop in voltage. The breakdown voltage is determined by the PN junction and is as such, very consistent and predictable. The 2EZ170D5/TR8 has a breakdown voltage of 170 volts.

For applications that require a reverse-bias current, such as lightning protection and over-voltage protection, the diode can be used as a voltage reference. By using an appropriate current through the diode, the zener voltage of the 2EZ170D5/TR8 can be used to maintain a constant voltage value.

Conclusion

In conclusion, the 2EZ170D5/TR8 is an excellent single zener diode with an exceptionally low VZ, an exceptionally high ZZT, and an exceptionally moderate package size. Its many applications, such as over-voltage protection, gate isolation, reverse circuit protection, reference voltage stabilization and low-voltage clamping make it an ideal solution for many different applications. Furthermore, its simple yet effective working principle makes it easy to use and dependable.

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