Voltage - Clamping (Max) @ Ipp:	35.5V
Supplier Device Package:	DO-204AC (DO-15)
Package / Case:	DO-204AC, DO-15, Axial
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	No
Power - Peak Pulse:	500W
Current - Peak Pulse (10/1000µs):	14.1A
Series:	Automotive, AEC-Q101, TransZorb®
Voltage - Breakdown (Min):	24.4V
Voltage - Reverse Standoff (Typ):	22V
Bidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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TVS – Diodes

TVS (transient voltage suppression) diodes are specially designed for suppressing fast and high-energy transients such as those created by lightning and electrical noise. The SA22CAHE3/73 is one such device used for this purpose. In this article, we will discuss the application field as well as the working principle of this TVS diode.

Application Field of SA22CAHE3/73

The SA22CAHE3/73 is a type of unidirectional diode particularly suitable to suppress transients caused by short-circuit currents, fault conditions or even any other overvoltage transients that could harm electrical transmissions. It has bi-directional ESD protection to safeguard data lines in electronic systems that support high-speed applications like HDMI, USB 3.1, and other high-speed connection technologies. Its wide power dissipation capability and low clamping voltage makes it ideal for a range of applications, such as:

• Computer and peripherals
• Communication networks
• Industrial electronics
• Consumer electronics

The SA22CAHE3/73 features a low typical clamping voltage of 8.0V and an operating temperature range from -55℃to + 150℃, making it suitable and highly reliable for a variety of circuits and applications. It also features a current rating of 2.5A.

Working Principle of SA22CAHE3/73

The working principle of the SA22CAHE3/73 involves rectification of high-frequency AC pulses. The diode acts as a bridge between the energy source and the circuit in which it is connected, and the current flows through the diode when a sufficient positive voltage is applied to the anode with respect to the cathode. When the current flows through the diode, the voltage across its terminals decreases. This decrease in voltage helps protect the circuit from the harmful transients.When the pulse is too large for the diode to handle, it will conduct the pulse current until it breaks down and the voltage across it increases. This increase in voltage will cause the diode to break down. Once the voltage is clamped at a certain level the diode will then act as a short circuit until the current passes.

Conclusion

The SA22CAHE3/73 diode is an ideal device for suppressing fast and high-energy transients. It provides bi-directional ESD protection, as well as a low clamping voltage, wide power dissipation, and wide operating temperature range. Its working principle involves rectification of high-frequency AC pulses, and the diode will break down when the voltage across its terminals is too high.

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