MSMBG15AE3/TR Circuit Protection

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Transient Voltage Suppressors (TVSs) are solid state, three-terminal devices that offer high-speed protection for products and systems from transient overvoltage. In electronics, overvoltage can be caused by an array of sources such as an inductive load switch off, lightning strikes, or electrostatic discharge (ESD). TVSs are designed for bidirectional protection, and will protect from both positive and negative transients.

The MSMBG15AE3/TR TVS is a Uni-directional device designed to protect against electrostatic discharge. It operates on a Simplestraw TVS process technology and offers an excellent ESD protection level. The device has a low operating voltage of 5.5V and fast signal-line protection. It is RoHS compliant and comes with a wide operating temperature range of -65°C to 150°C.

MSMBG15AE3/TR Application Field

The MSMBG15AE3/TR is designed for data and communication lines in automotive and industrial markets and can protect lines from fast transients, ESD, and lightning strikes. This TVS is also ideal for space-constrained board designs and is excellent for devices such as automotive ECU applications, LED double-datasheet interface protection, CAN bus, USB ports, and other industrial applications. Additionally, the device has an ESD immunity level of 4kV, making it much more robust than other TVSs. Finally, the MSMBG15AE3/TR is designed with a narrow body package that is easy to clone onto the PCB design, making it easier to prototype and develop.

MSMBG15AE3/TR Working Principle

The MSMBG15AE3/TR is an avalanche type TVS. It is based on the principle of avalanche multiplication to increase the conduction current that occurs when a diode is operated in reverse bias voltage. This makes it a bidirectional device that can absorb both positive and negative transients. As the reverse bias voltage of the diode increases, a predetermined avalanche voltage (Vbr) is reached. Above this Vbr, the voltage across the TVS increases sharply, and a large current flows through the diode. This current then suppresses the transient. Thus, the TVS works on the principle that it clamps a signal to a lower voltage, thereby suppressing the transient current.

When the avalanche voltage is reached, the reverse blocking of the TVS will activate and it will clamp the signal to a lower voltage, reducing the transient voltage and current. Thus, the TVS acts as a surge suppressor, clamping transients and reducing their intensities. The avalanche multiplication helps to dissipate transients, providing it with the ability to reduce both high energy transients and electrical noise.

To conclude, the MSMBG15AE3/TR is a Uni-directional TVS designed for electrostatic discharge protection. It is excellent for automotive and industrial applications and is very robust, with an ESD immunity level of 4kV. Additionally, its Simplestraw technology and narrow body package make it easier to prototype and develop products. Ultimately, the device works on the principle of avalanche multiplication, clamping signals to reduce transient voltages and currents.

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