SA48AHE3/73 Circuit Protection

Voltage - Clamping (Max) @ Ipp:	77.4V
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):	6.5A
Series:	Automotive, AEC-Q101, TransZorb®
Voltage - Breakdown (Min):	53.3V
Voltage - Reverse Standoff (Typ):	48V
Unidirectional 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

Transient Voltage Suppression (TVS) diodes, also commonly referred to as Transient Voltage Suppressors (TVSs), are surge protectors used to protect sensitive electronic components from electrostatic discharge (ESD) and other high-energy transients. A TVS diode is a specialized diode designed to protect electrical equipment from damages due to voltage surge. It is one of the widely used components for surge protection in many electronic circuits.The SA48AHE3/73 is a general purpose, unidirectional overvoltage protection device, designed to safeguard sensitive components from transient voltage events. The device can provide up to 73V of working voltage and 48A of peak pulse current capability. It is a low capacitance device with low holding voltage and fast response time, making it suitable for a wide variety of high speed protection applications.The device is designed to clamp high-energy pulses and voltage transients to a safe level. When the input voltage reaches a certain threshold, the SA48AHE3/73 will quickly clamp the voltage in order to protect the device it is used on. Due to its low capacitance and fast response time, the device is suitable for use as a clamping protection device in high-speed signal lines or power supplies.The SA48AHE3/73 can be used in a variety of protection applications, including computers, medical equipment, instrumentation, communications, consumer electronics, and automotive applications. It can be integrated into protection circuits with other TVS, MOVs, varistors, and/or other components to provide overall protection against damage from voltage spikes, ESD, induced noises, and high-frequency transients.The working principle of the device involves the diode\'s junction capacitance. When a pulse is applied to the diode, the junction capacitance charges up and begins to conduct current. This current must pass through the diode\'s depletion region, which causes a voltage drop. As the current conducted through the device starts to increase, the depletion region expands, leading to an increase in the junction capacitance. This results in an even larger voltage drop, and eventually the tail current must decay to zero. This dynamic process provides the protection against transient voltages by quickly clamping the voltage to a safe level.In addition to providing transient protection, the SA48AHE3/73 also provides ESD protection. The ESD protection is achieved through its clamping action, similar to the one used to protect against transient events. The device has a maximum surge capability of 15kV, which is sufficient for the protection requirements of most electronic components.The SA48AHE3/73 is a small, thermally-enhanced, surface-mount package, and its low capacitance makes it a suitable candidate for use in high speed applications. It is also highly resistant to moisture, corrosion, and humidity, making it suitable for use in harsh environmental conditions.In conclusion, the SA48A42/73 is an excellent example of a general-purpose TVS diode, designed to protect sensitive components from transient voltages and ESD. Its small form factor, low capacitance, and fast response time make it suitable for a wide range of protection applications.

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