3EZ33D10/TR12

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	33V
Tolerance:	±10%
Power - Max:	3W
Impedance (Max) (Zzt):	20 Ohms
Current - Reverse Leakage @ Vr:	500nA @ 25.1V
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:	3EZ33

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Introduction

The 3EZ33D10/TR12 diode is a single Zener diode typically used in a wide range of applications, from voltage regulation to signal processing and telecoms. In this article, we will explore the application field and working principle of the 3EZ33D10/TR12 diode.

Application field

The 3EZ33D10/TR12 diode is mostly used in the fields of circuit protection and regulation. Its most common application is as a voltage regulator, being connected in parallel with a resistor. This diode acts as a voltage sink, absorbing any voltage in excess of the designated threshold, thus regulating the output voltage of a circuit. The 3EZ33D10/TR12 can also be used in telecoms applications to protect sensitive devices in the circuit from voltage spikes. In order to do so, the diode should be connected with its anode facing the positive direction of the voltage spike. As soon as the voltage exceeds the protection threshold, the diode will immediatly start clamping down voltage, thereby safeguarding the circuit from hardware failure or damage.Apart from its protective properties, the 3EZ33D10/TR12 can also be used as a signal processing device, by connecting it in series to the circuit. The current will then be limited by the diode, making it an efficient and cost-effective alternative to other signal-limiting devices.

Working principle

The 3EZ33D10/TR12 diode is a single Zener diode, meaning that it utilises the Zener effect in order to regulate and/or limit voltage. This effect basically implies that the diode is forward-biased, yet the PN junction remains a low-resistance path and allows the current to flow normally, even if the voltage goes over the Zener breakdown voltage, which in the case of the 3EZ33D10/TR12 is 6.6V.Once the voltage reaches a certain threshold, the junction breaks down and the diode behaves almost like an open-circuit, and any voltage in excess of 6.6V will be absorbed. This way, the diode can both protect sensitive circuits from voltage spikes, or act as a signal processing device, limiting the max voltage allowed.

Conclusion

The 3EZ33D10/TR12 Zener diode is a single-electrode component with a wide range of applications ranging from protection and regulation to signal processing. Its working principle is based on the Zener Effect, which basically implies that the diode is forward-biased and when the voltage goes over the Zener breakdown voltage, the diode starts absorbing excess voltage, thus performing its respective function.

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