SMBJ28A R5G Circuit Protection

Series:	SMBJ
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Zener
Unidirectional Channels:	1
Voltage - Reverse Standoff (Typ):	28V
Voltage - Breakdown (Min):	31.1V
Voltage - Clamping (Max) @ Ipp:	45.4V
Current - Peak Pulse (10/1000µs):	13.8A
Power - Peak Pulse:	600W
Power Line Protection:	No
Applications:	General Purpose
Capacitance @ Frequency:	--
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	DO-214AA, SMB
Supplier Device Package:	DO-214AA (SMB)

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TVS - Diodes

The SMBJ28A R5G is a commonly used type of transient voltage suppression (TVS) diode. It is used to protect sensitive electronic components from over-voltage conditions, as well as from transients caused by electrostatic discharge (ESD). TVS diodes are components that limit voltage spikes within a predetermined range, to prevent these spikes from damaging electrical equipment. This article will discuss the application fields and working principles of SMBJ28A R5G TVS diodes.

Applications

SMBJ28A R5G diodes are commonly used in a variety of applications. In particular, these diodes are often used in portable electronics that are susceptible to voltage spikes, such as laptop computers, mobile phones, and digital cameras. SMBJ28A R5G diodes can also be used to protect high-voltage circuits, such as those found in industrial applications. These diodes can also be used to protect automotive electronics, such as those found in automobiles, from voltage spikes. In addition to protecting against voltage surges, these diodes can also be used to protect against electrostatic discharges (ESD). ESD is generated by the triboelectric effect, which occurs when two objects rub together and generate an electric charge. ESD can cause damage to electronic components, but the use of SMBJ28A R5G diodes can help protect them.

Working Principle

SMBJ28A R5G diodes operate by limiting voltage to a predetermined amount, which is known as the "clamping voltage". When the input voltage exceeds the clamping voltage of the diode, the diode becomes "conductive" and allows current to pass through it. This creates a "voltage clamp", which limits the maximum voltage that can be applied to the protected component. When the transient voltage exceeds the diode\'s clamping voltage, the diode will conduct current and absorb energy, which is dissipated as heat. If too much energy is dissipated, the diode can become damaged. Therefore, a properly designed circuit should be used to protect the diode from excessive current and voltage levels. To maximize the protection provided by the diode, the diode should be placed close to the component which it is protecting. This will help to minimize the lead length, which can reduce the amount of energy dissipated in the circuit. Additionally, the diode should be placed in parallel with the protected component, rather than in series. This will help to reduce the amount of voltage drop while still allowing current to flow through the diode quickly when the voltage spike occurs.

Conclusion

In conclusion, the SMBJ28A R5G is a commonly used type of TVS diode that can be used to protect sensitive electronic components from voltage surges and electrostatic discharge. These diodes operate by limiting voltage to a predetermined clamping voltage, and are typically placed close to the component they are protecting. With proper circuit design, SMBJ28A R5G diodes can provide effective protection against voltage surges and ESD.

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