SMBJ300CATR

Voltage - Clamping (Max) @ Ipp:	486V
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):	1.3A
Series:	--
Voltage - Breakdown (Min):	335V
Voltage - Reverse Standoff (Typ):	300V
Bidirectional 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 SMBJ300CATR is a type of Transient Voltage Suppressor (TVS) diode which provides a wide range of protection from over-voltage or transient surge events. This protection component offers a variety of advantages, especially for power sensitive applications in which reliability and safety are critical. In this article, we will discuss the application of SMBJ300CATR and provide an overview of the working principle of the diode.

Applications

The SMBJ300CATR is a widely used component in a variety of industrial and consumer applications. These devices are used in power supplies, computers, audio equipment, automotive electronic systems, and even household appliances. The variety of applications is so wide that it can be difficult to pinpoint the exact use of the SMBJ300CATR. In general, the TVS diode is used to protect devices from over-voltage and transient surge events.In more specific applications, the SMBJ300CATR is often used for voltage clamping at low voltage levels. This can be useful in data signaling applications, such as USB and other low power systems. Additionally, the component can be used in more power-intensive applications, such as high voltage motor drives, power inverters, LED lighting, and automotive electronic systems.

Working Principle

The working principle of the SMBJ300CATR TVS diode involves the use of a zener diode connected in parallel with a silicon avalanche diode. The zener diode is designed to operate at a specific breakdown voltage, while the silicon avalanche diode is configured to break down the voltage and forward current when the voltage exceeds its breakdown voltage. This combination of two diodes helps to provide the necessary protection and clamping needed for the device.When an over-voltage or transient surge event is detected, the SMBJ300CATR diode begins to conduct current. This is due to the conduction of current by the silicon avalanche diode. Since the zener diode is designed to operate at a specific breakdown voltage, it prevents the voltage from increasing beyond a certain level. This allows the device to clamp the voltage within a safe range, providing necessary protection to the sensitive components in the system.

Conclusion

The SMBJ300CATR is a type of Transient Voltage Suppressor (TVS) diode which provides a wide range of protection. This TVS diode is used in a variety of applications for both industrial and consumer products, and offers reliable protection for sensitive power components. The working principle of the SMBJ300CATR involves the use of a zener diode and a silicon avalanche diode, which helps to provide the necessary voltage clamping when an over-voltage or transient surge event is detected.

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