SMBJ6.5A-E3/5B Circuit Protection

Current - Peak Pulse (10/1000µs):	53.6A
Base Part Number:	SMBJ
Supplier Device Package:	DO-214AA (SMBJ)
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
Series:	TransZorb®
Voltage - Clamping (Max) @ Ipp:	11.2V
Voltage - Breakdown (Min):	7.22V
Voltage - Reverse Standoff (Typ):	6.5V
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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TVS - Diodes

The SMBJ6.5A-E3/5B is a two-terminal electrostatic voltage regulator module designed for transient voltage and overvoltage protection of sensitive electronic components. These transient voltage suppressors (TVS) have many applications across multiple fields and are often used to protect from high voltage transients or electrical overstress (EOS). This article will focus on the application fields and working principle of the SMBJ6.5A-E3/5B TVS diode.

Applications

The SMBJ6.5A-E3/5B is a high-speed unidirectional transient voltage suppressor diode that is often used for protection from high voltage transients or ESD pulses. It’s most common applications include protection for integrated circuits, power supplies, signal lines, and other sensitive electronics. The SMBJ6.5A-E3/5B can absorb extremely high levels of electrostatic discharge (ESD), which makes it an essential component for use in automotive electronics and other sensitive applications. It can also protect microprocessors and memory chips from voltage spikes caused by equipment switching or lightning storms. Other applications for the SMBJ6.5A-E3/5B include mobile device protection, industrial equipment, personal computers, and LCD TVs. It can also be used in medical devices, telecommunication systems, and military equipment.

Working Principle

The SMBJ6.5A-E3/5B is designed to clamp transient voltage and limit current during an overvoltage event. It features an electrostatic discharge (ESD) protection diode that is constructed with a high voltage metal oxide varistor (MOV) and a low voltage polymeric positive temperature coefficient (PPTC) layer. The MOV acts as a voltage-dependent resistor that can absorb large amounts of energy when the voltage exceeds its threshold. When the voltage reaches a certain predefined surge limit, the MOV conducts and quickly conducts energy away from the electrical circuit. The PPTC serves as a failsafe, preventing the MOV from overloading and stopping the entire circuit from becoming permanently damaged. In the event of an overvoltage, the SMBJ6.5A-E3/5B diode is designed to conduct the excess current away from the circuit. It prevents current surges from reaching sensitive electronic components by limiting the amount of energy the component can endure. As a result, the SMBJ6.5A-E3/5B module can protect the circuit and its components from permanent damage due to EOS or ESD.

Conclusion

The SMBJ6.5A-E3/5B is an important two-terminal electrostatic voltage regulator module designed to protect sensitive electronic components from high voltage transients or EOS. It is commonly used in automotive electronics, mobile devices, and medical devices, as well as many other applications. The device works by conducting excess current away from the circuit to ensure the components do not become permanently damaged. As such, the SMBJ6.5A-E3/5B is an essential component of many electronics that require protection from voltage transients or ESD.

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