SMBJ18A-E3/52 Circuit Protection

Current - Peak Pulse (10/1000µs):	20.5A
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:	29.2V
Voltage - Breakdown (Min):	20V
Voltage - Reverse Standoff (Typ):	18V
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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SMBJ18A-E3/52 TVS - Diodes

Transient Voltage Suppressors (TVS) are components that are used as protection against transients and surges in both AC and DC power supplies. The SMBJ18A-E3/52 is a Voltage Protectors TVS diode, which is a key component in electronic circuits that provide both protection and overload current limiting.

Application Fields

The SMBJ18A-E3/52 TVS diode is mainly used in an array of different applications, including power supplies, power control circuits, battery circuits, automotive circuits and electronic equipment containing USB interfaces.The SMBJ18A-E3/52 has a low clamping voltage of 17.2V, making it ideal for applications where the power supply voltage does not exceed 18V. It is also designed to be able to tolerate high ESD pulses and transients, making it suitable for protecting against voltage and current spikes in power supplies and automotive circuits.

Working Principle

The SMBJ18A-E3/52’s working principle is based on the Zener principle of allowing current to flow in the opposite direction when the voltage reaches a certain breakdown voltage. When the applied voltage reaches the breakdown voltage, the diode will start to conduct, allowing current to flow in the opposite direction, thus providing protection against power surges and transients.The diode also provides over-current protection by limiting the maximum allowable current that can flow through it. This is done by changing its resistance when a certain current is reached, thus breaking the circuit.

Conclusion

The SMBJ18A-E3/52 TVS diode provides excellent protection against transients and power surges in a variety of applications. Its low clamping voltage makes it suitable for applications where the power supply voltage does not exceed 18V. Its over-current protection helps to prevent circuit damage in the event of an overload. This makes the SMBJ18A-E3/52 TVS diode a reliable protection solution in a wide range of applications.

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