MSMBJ33A/TR

Composition and Principles of TVS- Diodes

A transient voltage suppressor (TVS) diode is an electronic device primarily used to protect sensitive electronic components and circuits from voltage spikes, or transients. This surge current-limiting protection device is usually designed to protect products such as computers, telecommunication equipment, automotive electronics, medical devices, consumer electronics and power supplies from a variety of overvoltage threats. The TVS device is essentially a silicon junction diode that has been specially designed with a high maximum power dissipation rating to enable it to withstand and protect against large transient spikes.

MSMBJ33A/TR and its Operation Principle

The MSMBJ33A/TR is a transient voltage suppressor series diode from Microsemi Corp. This diode is widely used to clamp transients in line transient voltage protection circuits in automotive, consumer & industrial applications. The device itself has a low leakage current and is capable of dissipating large ESD levels up to 4kV. It does not require external protective components, and has excellent surface mount packaging for conduction cooling capability.

The MSMBJ33A/TR has the operating principle of a Zener diode. This diode behaves like a normal silicon diode, meaning that it blocks the current flow in the reverse direction. Then, when the voltage exceeds the breakdown voltage of the diode, it allows the current to flow in the reverse direction. The current flowing through the diode creates a voltage drop across it, thus preventing further increase in the voltage across the input. When the voltage falls below the breakdown voltage, the diode then blocks the current flow once again.

Applications for MSMBJ33A/TR

The MSMBJ33A/TR is generally used in applications involving high voltage surge and power spike protection, or transient voltage suppression. These diodes are often used in automotive electronics, power supplies, computers, and consumer and industrial applications. Additionally, the devices are often used in applications such as automotive temperature and humidity sensors, motor controllers, radio receivers, and other high-voltage protection circuits.

The MSMBJ33A/TR can also be used in overvoltage protection circuits, protecting sensitive ICs from accidental pulses of high voltage. In addition, they can be used in protection circuits for photovoltaic (PV) cells, protecting the PV cell from circuit noise and high surges of current.

Conclusion

TVS- diodes are a versatile form of protection for a variety of electronics. The MSMBJ33A/TR is one type of these devices that can be used to provide overvoltage protection in applications from automotive electronics to power supplies and consumer electronics. The device has a low leakage current and high ESD level protection, and allows for conduction cooling with its surface mount package.