BZX55A27-TAP

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Zener (Nom) (Vz):	27V
Tolerance:	±1%
Power - Max:	500mW
Impedance (Max) (Zzt):	80 Ohms
Current - Reverse Leakage @ Vr:	100nA @ 20V
Voltage - Forward (Vf) (Max) @ If:	1.5V @ 200mA
Operating Temperature:	175°C
Mounting Type:	Through Hole
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	DO-35

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Introduction

Diodes - Zener - Single is a category of electronic components that can provide electronic protection and voltage regulation. Zener diodes are widely used in power circuits, especially power systems. Their use has become indispensable to the modern electronic industry. The BZX55A27-TAP is one such example of a Zener diode.

Application Field

BZX55A27-TAP is a high-performance low power consumption surface mount Zenor diode which is able to provide voltage regulation when used in power circuit. The device has a wide operating temperature range, from -65°C to +150°C, making it suitable for a variety of industrial applications, such as frequency detector, temperature protection and voltage Regulation system. In communication systems, BZX55A27-TAP can be used to monitor and protect the safety of the equipment. Its good Electrical Insulation properties also make it ideal for wave-type rectification circuit.

Working Principle

BZX55A27-TAP works on the same principle as other Zener diodes. It has a PN junction which is capable of conducting current in both directions, but the conducting current mainly flows from P region to N region. When a voltage is applied, the conducting current is limited to a certain level, known as the Zener or Breakdown Voltage. The BZX55A27-TAP is rated for a Zener voltage of 27V.When the voltage across the PN junction reaches the rated level, the breakdown voltage is reached and current begins to flow in both directions, causing the device to heat up due to the resistance of the material used. This heat can damage the device if it reaches a certain level. To avoid this, the BZX55A27-TAP is designed with a thermal protection mechanism to prevent the circuit from overheating.When the PN junction reaches the Zener voltage, a large number of charge carriers are generated in the N region, resulting in an avalanche breakdown of the junction which causes the current to increase rapidly. This high current is limited by the current limiting resistors which are connected in series with the device. The current limiting resistors of the BZX55A27-TAP are designed to limit the current to a safe and consistent level, thus preventing the avalanche breakdown from causing any damage and ensuring safe operation.

Conclusion

The BZX55A27-TAP is a high-performance low power surface mount Zenor diode that provides voltage regulation when used in power circuits. It is suitable for a variety of applications and its good electrical insulation properties make it ideal for wave-type rectification circuits. In addition, it has a thermal protection mechanism to prevent the device from overheating when the Zener voltage is reached.

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