SMBJ120A

Voltage - Clamping (Max) @ Ipp:	193V
Supplier Device Package:	DO-214AA (SMBJ)
Package / Case:	DO-214AA, SMB
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	600W
Current - Peak Pulse (10/1000µs):	3.1A
Series:	SMBJ
Voltage - Breakdown (Min):	133V
Voltage - Reverse Standoff (Typ):	120V
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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SMBJ120A TVS - Diodes

A transient-voltage-suppression (TVS) diode is an essential component in the field of electrical engineering and electronics. The SMBJ120A is a TVS diode used to protect component from various types of electrical transients or spikes such as those caused by electromagnetic interference (EMI). The SMBJ120A is a fast, unidirectional device designed specifically to protect sensitive electronic components and systems from damaging voltage spikes.

Features of SMBJ120A

The SMBJ120A is a surface-mount unidirectional 600W transient voltage suppressor (TVS) diode designed for high-speed pulse-sensitive applications. It offers near-zero recovery time and provides superior electrical and thermal performance at a low cost. The device is featured with a working peak reverse voltage of 120V and a working peak pulse power of 600W.

Applications

The SMBJ120A can be found in various applications and devices, ranging from computers, telecommunications equipment, consumer electronics, automotive electronics, industrial control systems and medical devices. It can also be used as an overvoltage protection device along with a crowbar circuit. Common applications of the SMBJ120A are as follows.- Line protection circuits for PC motherboards- GSM modems- USB ports- Telecommunications equipment- Consumer Electronics & Automotive electronic- Industrial control systems- Medical equipment- Computer Central Processor Units (CPUs)- Automotive electronics systems- Servers and power supplies

Working Principle

The key function of the SMBJ120A is to limit peak voltage transients to a safe level for the component connected to it. The SMBJ120A has a clamp rating of 120 volts, which limits the voltage spike to 120V or less. When the voltage rises above the clamp rating, the device is triggered into action. It then prevents the voltage from rising any higher, thus protecting the connected components from electrical damage due to overvoltage.The SMBJ120A works by introducing an impedance in series with the load, which limits the rate of change of current. When a voltage spike occurs, the device has enough time to react and react, thus limiting the peak voltage by clamping the surge. The device also has a capacitor, which helps to filter out high frequency electromagnetic noise, thus providing additional protection to the network. The SMBJ120A is also designed to have low-voltage turn-on characteristics, which allows it to be used even when the power supply voltage is below its required clamp voltage. This prevents any false triggering of the device when the power supply voltage dips. The SMBJ120A also has thermally and overvoltage protection features, which protect the connected component from overheating or overvoltage.

Conclusion

The SMBJ120A is a fast, effective, and low-cost transient voltage suppressor (TVS) diode designed for use in a wide range of applications. It is capable of clamping peak voltages of up to 120V and has excellent thermal and overvoltage protection capabilities. The device\'s low-voltage turn-on characteristics make it ideal for use in power supplies and other low voltage applications. The SMBJ120A is also suitable for use in devices and applications exposed to high levels of EMI.

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