MSMBJ40A/TR

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TVS - Diodes

TVS (Transient Voltage Suppressors) diodes are generally used in applications where protecting an electronic circuit against high surge voltages are required. It is also used to protect against impulsed generated transients such as electromagnetic interference (EMI) and radio frequency interference (RFI). In order for the device to work effectively, the two main components that make up the TVS diode are the Zener diode and the Avalanche diode.

MSMBJ40A/TR is a surface mounted TVS diode from ON Semiconductor that has been designed specifically to protect sensitive components in consumer electronics, networking and communication equipment.

Application Fields

MSMBJ40A/TR is a unidirectional device that offers a breakdown voltage of 40V and a low capacitance of 1.3pF which makes it ideal for applications in interfaces such as USB, HDMI, Ethernet, and other high speed communications. It is also suitable for a variety of applications including consumer electronics, personal computers set-top boxes, modems, hard drives, RF communications and more.

Working Principle

The two components that make up the MSMBJ40A/TR TVS diode are the Zener diode and the Avalanche diode. The Zener diode works by allowing current to flow from the anode to the cathode when the voltage exceeds the breakdown voltage of the Zener diode at which point the diode will start to conduct current. This provides electrostatic protection to the circuit from voltage spikes and helps limit the amount of current that flows into the circuit.

The Avalanche diode works by releasing a large amount of current, known as an avalanche, in order to dissipate the energy when the voltage exceeds the breakdown voltage of the diode. This helps to protect the circuit from voltage spikes and limit the amount of current that flows into the circuit. Furthermore, the MSMBJ40A/TR is also able to protect against transients such as EMI and RFI due to its low capacitance.

In conclusion, the MSMBJ40A/TR is a unidirectional TVS diode from ON Semiconductor that has been designed specifically to protect sensitive components from voltage spikes, EMI and RFI. It has a breakdown voltage of 40V and a low capacitance of 1.3pF which makes it ideal for a wide range of applications in consumer electronics, communication and networking equipment.

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