SA33CAHE3/73 Circuit Protection

Voltage - Clamping (Max) @ Ipp:	53.3V
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):	9.4A
Series:	Automotive, AEC-Q101, TransZorb®
Voltage - Breakdown (Min):	36.7V
Voltage - Reverse Standoff (Typ):	33V
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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Introduction

TVS (Transient Voltage Suppression) diodes are an integral component of power supplies and high-speed electronics systems. They function as protection against various voltage transients, such as electrostatic discharge (ESD), electrical overstress (EOS), lightning-induced transients, and other induced high-voltage transients. In order to protect sensitive electronic equipment, these devices help provide the necessary protection. The SA33CAHE3/73 is a high-performance, fast-acting, ESD- and EOS-protected, high-efficiency TVS diode designed for maximum suppression of unwanted transient voltage events, such as ESD, EFT, and lightning strikes. It features a low on-state voltage drop at 25 mA, a fast response time, and a low clamping voltage. It is a robust and reliable device suitable for use in many different demanding applications.

SA33CAHE3/73 Application Field

The SA33CAHE3/73 TVS diode can be used in a wide variety of applications such as mobile devices, digital cameras, automotive systems, telecom networks, radios, and other high-frequency electronics. It is particularly suitable for ESD protection of sensitive high-frequency electronics, in which the low on-state voltage drop is especially important. Furthermore, the fast response time of the device, along with its low clamping voltage, make it an excellent choice for lightning-induced transient protection in ultrasonic devices, radar systems, and aerospace electronics.

Working Principle

TVS diodes effectively protect circuits from damaging high-voltage transients, such as ESD, EFT, and lightning. When subjected to these transient events, the diode begins to conduct, quickly clamping the voltage below the maximum ratings of the surrounding components, usually between 5 and 10V. This essentially “shorts” the transient, forcing it to the ground potential and limiting the amount of energy dissipated into the system. The SA33CAHE3/73 is optimized for peak pulse power handling capability. It features a very low on-state voltage drop at high currents and a fast response time. Moreover, its low clamping voltage ensures maximum protection against electrical overstress and lightning. The TVS diode also serves as an effective secondary protection element in most automated systems.

Conclusion

The SA33CAHE3/73 is a fast, high-efficiency TVS diode designed to protect sensitive electronics from high-voltage transients, such as ESD, EFT, and lightning strikes. The device features a low on-state voltage drop at high currents, coupled with a fast response time and a low clamping voltage. It is an excellent choice for ESD and EFT protection in mobile devices, digital cameras, automotive systems, telecom networks, and other high-frequency electronics, and for lightning protection in ultrasonic devices, radar systems, and aerospace electronics.

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