SAC12 Circuit Protection

Series:	SAC
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Zener
Unidirectional Channels:	1
Voltage - Reverse Standoff (Typ):	12V
Voltage - Breakdown (Min):	13.3V
Voltage - Clamping (Max) @ Ipp:	19V
Current - Peak Pulse (10/1000µs):	25A
Power - Peak Pulse:	500W
Power Line Protection:	No
Applications:	General Purpose
Capacitance @ Frequency:	--
Operating Temperature:	-55°C ~ 175°C (TJ)
Mounting Type:	Through Hole
Package / Case:	DO-204AC, DO-15, Axial
Supplier Device Package:	DO-204AC (DO-15)

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Abstract:SAC12 is a type of transient voltage suppressor diode. It works by clamping voltage due to avalanche breakdown when the input voltage exceeds its breakdown voltage. This article discusses the application field and the working principle of SAC12 diode.Introduction:Transient voltage suppressor (TVS) diodes are widely used in electronics, specifically to protect circuits from excessive voltage or current in the form of transient surge or “spikes”. The most common type of TVS diode is the SAC12, which is popular for its rapid response time and low capacitance.Application Field of SAC12 Diode:SAC12 diodes are widely used in a variety of applications, such as AC pulsing, ultra-fast switching, TV and computer SMPS, and transient overvoltage protection for all kinds of sensitive electronic equipment. This type of diode offers high reliability and robust performance in the presence of negative transient voltages, making it an ideal choice for many consumer electronics. Furthermore, the SAC12 diode also has excellent circuit speed and low capacitance, making it suitable for high speed and low power systems.Working Principle of SAC12 Diode:The SAC12 diode works by clamping voltage due to avalanche breakdown when the input voltage exceeds the breakdown voltage. In this way, a low-impedance path is created to protect sensitive components from damage due to transient voltage. At normal operating conditions, the reverse breakdown voltage of the diode is equal to its rated holding voltage. However, when the applied voltage exceeds the reverse breakdown voltage of the diode, the reverse voltage across the diode increases and results in the formation of avalanche carriers. These carriers create a low-impedance path, and thus the diode acts as a fast-acting clamp.In this way, the SAC12 diode can rapidly dissipate the excess energy and maintain a safe voltage level for downstream circuitry.Advantages of SAC12 Diode:The main advantage of the SAC12 diode is its low capacitance, which ensures fast response time in the event of a surge. Furthermore, its robust construction and fast response time make it suitable for a variety of applications. Additionally, the SAC12 diode is designed with an inbuilt ESD protection circuit, which makes it immune to the effects of electrostatic shocks.Limitations of SAC12 Diode:The main limitation of the SAC12 diode is its lower current handling capacity compared to other TVS diodes. Additionally, its higher forward voltage drop may affect the efficiency of the circuits in which it is employed. Conclusion:The SAC12 is a type of transient voltage suppressor (TVS) diode. It works by clamping voltage due to avalanche breakdown when the input voltage exceeds its breakdown voltage. This article discussed the application field and the working principle of SAC12 diodes. This type of diode offers high reliability, robust performance in the presence of negative transient voltages, and low capacitance. Additionally, it also has an inbuilt ESD protection circuit. However, its lower current handling capacity and higher forward voltage drop may reduce the efficiency of the circuits in which it is employed.

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