BZX84C27S-7

Power - Max:	200mW
Base Part Number:	BZX84C27S
Supplier Device Package:	SOT-363
Package / Case:	6-TSSOP, SC-88, SOT-363
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Current - Reverse Leakage @ Vr:	100nA @ 18.9V
Impedance (Max) (Zzt):	80 Ohms
Series:	--
Tolerance:	±6%
Voltage - Zener (Nom) (Vz):	27V
Configuration:	2 Independent
Moisture Sensitivity Level (MSL):	--
Part Status:	Discontinued at Digi-Key
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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• Introduction

The BZX84C27S-7 belongs to a family of diodes known as Zeners or Zener arrays. These devices are commonly used in a variety of electrical and electronic applications due to their ability to resist breakdown when exposed to high voltages. Zener arrays typically consist of a number of series-connected Zener diodes, allowing for greater control over the breakdown voltage than would be possible with a single Zener diode. The BZX84C27S-7 is a generic model of Zener array with its most common application being to provide overvoltage protection for electronic systems.

• Application Field

The primary application for the BZX84C27S-7 is to provide protection for electronic systems against electrical overvoltage. This protection is achieved by using the Zener diodes to absorb any excess voltage that passes through the array. This is done by having the Zener diodes break down when the applied voltage exceeds a predetermined level. The exact breakdown voltage can be adjusted by selecting the specific Zener diodes used in the array.The BZX84C27S-7 is also commonly used in switching circuits, such as thyristors, triodes and bipolar junction transistors. In these applications, the Zener diodes are used to control the voltage across the device, helping to ensure that they switch off and on at the correct voltages.

• Working Principle

The BZX84C27S-7 is a type of Zener array, which is composed of a number of Zener diodes connected in series. Each Zener diode has an anode and a cathode and features a reverse breakdown voltage. This voltage is the voltage at which the diode will start to conduct current in the reverse direction. By connecting the Zener diodes in series, the overall breakdown voltage is the sum of the breakdown voltages of each individual diode.When the applied voltage exceeds the breakdown voltage of the array, the Zener diodes will start to conduct current in the reverse direction. This current is then dissipated as heat, effectively limiting the voltage across the array to the predetermined breakdown voltage.

• Conclusion

The BZX84C27S-7 is a type of Zener array which is commonly used to provide overvoltage protection for electronic systems. It consists of a number of series-connected Zener diodes, each with an anode and a cathode. When the applied voltage exceeds the breakdown voltage of the array, the Zener diodes start to conduct current in the reverse direction, which is then dissipated as heat. This effectively limits the voltage across the array to the predetermined breakdown voltage.

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