CMSZ5253B TR

Current - Reverse Leakage @ Vr:	100nA @ 19V
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	SC-70, SOT-323
Supplier Device Package:	SOT-323
Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	25V
Tolerance:	±5%
Power - Max:	275mW
Impedance (Max) (Zzt):	35 Ohms

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CMSZ5253B TR is a single zener diode with a reverse voltage of 5.6V and a current rating of 250mW. It is suitable for board level electronic protection and has a wide range of applications. This article will explain the application fields of CMSZ5253B TR, and its working principle.

Application Fields

CMSZ5253B TR is commonly used in board level electronic protection applications. It can be used in a variety of electronic devices, including voltage regulators, power supplies, instrumentation amplifiers, motor controllers, and lamps. In voltage regulators, the diode is typically used to protect the voltage regulator from excessive input voltage or reverse current. The diode can also be used as a clamp to limit the output voltage of the regulator. In power supplies, CMSZ5253B TR may be used to protect the sensitive components of the power supply from over-voltage. In instrumentation amplifiers, it can be used to limit the dynamic range of the input signal. In motor controllers, it can be used to regulate and protect the motor from excessive current. Finally, in lamps, CMSZ5253B TR may be used to limit the forward voltage of the lamp.

Working Principle

CMSZ5253B TR is a single zener diode. It acts as a diode in forward bias, meaning that current will flow from anode to cathode when a potential difference is applied across it. When the reverse bias voltage exceeds the breakdown voltage Vz, the diode enters what is known as the “zener region”, and current begins to flow from the anode to the cathode even with no potential difference applied. The breakdown voltage Vz of CMSZ5253B TR is 5.6V. In the zener region, the current through the diode is limited by the “zener impedance”, also known as the dynamic internal resistance Rz. This internal resistance limits the current through the diode, thus preventing damage to sensitive components.CMSZ5253B TR can be used in a variety of applications, such as voltage regulation, power supply protection, instrumentation amplifier dynamic range limitation, motor controller regulation and protection, and lamp current limiting. It acts as a diode in forward bias, and as a zener diode in reverse bias. The zener impedance Rz limits the current through the diode, thus preventing damage to sensitive components.

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