MSMBJ78A Circuit Protection

Voltage - Clamping (Max) @ Ipp:	126V
Supplier Device Package:	SMBJ (DO-214AA)
Package / Case:	DO-214AA, SMB
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	600W
Current - Peak Pulse (10/1000µs):	4.7A
Series:	Military, MIL-PRF-19500
Voltage - Breakdown (Min):	86.7V
Voltage - Reverse Standoff (Typ):	78V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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MSMBJ78A is a truck diode that is used to protect low voltage devices, such as telecommunications equipment, microprocessors, and other sensitive electronics, from transients such as lightning strikes and electrostatic discharge (ESD). MSMBJ78A is a TVS (Transient Voltage Suppressor) diode, which is a specialized type of diode used for protecting high-speed circuits from overvoltage transients.The MSMBJ78A consists of three main components: a zener diode, an avalanche diode, and a diode bridge. The zener diode is used as an initial voltage reference. Its purpose is to ensure that the voltage level across the diode is kept within a certain range. The avalanche diode is used to detect any overvoltage and divert the surge energy to ground. The diode bridge ensures that the correct polarity is maintained across the diode.The working principle of the MSMBJ78A is relatively simple. The diode is connected across the voltage supply lines of the circuit, in such a way that when the voltage across the diode exceeds the breakdown level of the diode, the diode begins to conduct. The conductive current is then diverted to ground, thus protecting the circuit from the harmful surge energy.The MSMBJ78A can be used in a variety of applications, including computers, telecommunications equipment, industrial equipment, consumer electronics, automotive circuits, and robotics. It is designed to provide protection against voltage transients in the range of 5-400V. The MSMBJ78A can also be used as part of an ESD protection system, as it is able to divert high-speed ESD pulses, thus protecting sensitive components from damage.The MSMBJ78A is an ideal choice for many applications, as it is small in size, easy to install, and cost-effective. It also offers a high surge capability and is able to provide reliable protection against transients up to 400V. The MSMBJ78A is available in a variety of packages, including SOD-123, SOD-323, SOT-23, SOT-323, SOT-373, and SC-76.In conclusion, the MSMBJ78A is a versatile and reliable protection device that is suitable for a wide range of applications. It is a cost-effective solution that is able to provide reliable protection against transients up to 400V, and is available in various packages, making it easy to install. It is also able to provide excellent protection against ESD, making it an ideal choice for many applications.

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