SMBJ400A-H

Voltage - Clamping (Max) @ Ipp:	648V
Supplier Device Package:	SMB (DO-214AA)
Package / Case:	DO-214AA, SMB
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	600W
Current - Peak Pulse (10/1000µs):	900mA
Series:	SMBJ
Voltage - Breakdown (Min):	447V
Voltage - Reverse Standoff (Typ):	400V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction to SMBJ400A-H TVS – Diode

TVS – Diode stands for Transient Voltage Suppressing Diodes, commonly abbreviated as TVS diodes, providestraightforward protection against voltage transients. SMBJ400A-H is a 400 watt peak pulse power ratings and 70 volts breakdown voltage unidirectional device that provides transient overvoltage protection and is designed to suppress transients with various pulse widths and frequent repetitions in one direction. It is a unidirectional device used in combination with a dual bidirectional suppressor for full-wave transient suppression.

Application Field of SMBJ400A-H

SMBJ400A-H is ideal for applications such wearable electronics, consumer electronics, personal computers, graphical processing units (GPUs), communications, data storage, and automotive applications that are subject to surges and television broadcasting. It is a unidirectional device and helps to protect these applications from higher transient overvoltages and is designed for military and industrial applications where fast response to transients is required.

Working Principle of SMBJ400A-H

SMBJ400A-H utilizes a silicon-based Avalanche Diode technology, which helps in fast switching and quick response to transients. These diodes also exhibit very low clamping voltages and sub-nanosecond response times, allowing them to be suitable for high frequency applications. They also reduce the risk of damage to the underlying circuitry and offers good bondability and improved protection levels, due to its fast recovery time.These diodes can also be combined with special components like capacitors and resistors, to create more efficient protection circuits. When an overvoltage is present, these components allow the voltage to pass through, which is then clipped by the TVS – Diode and dissipated through the resistors and capacitors. This help to reduce the peak voltage before it reaches the underlying circuitry, thus preserving the integrity of the device.

Conclusion

SMBJ400A-H TVS – Diode is a versatile and effective device for improving the robustness of electrical and electronic systems. Its application field includes protection of equipment from transients, and protection of electrical and electronic components from over-voltage transients that can damage their underlying circuitry. The Working Principle of this diode utilizes Avalanche silicon-based technology and helps to ensure a fast response to over-voltage transients. It is thus suitable for a variety of applications, such as consumer electronics and military systems.

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