TPSMB12A

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TVS - Diodes (transient voltage suppression diode) are a type of semiconductor device that is designed to protect electrical circuit and equipment from voltage spikes above the normal operating voltage. They are commonly used in electronic circuits to protect against voltage transients that can reach up to thousands of volts. The TPSMB12A is a particular type of TVS-Diode, designed for applications that require high levels of transient voltage protection. This article looks at the application field and working principle of the TPSMB12A.

The TPSMB12A is a dual-channel diode specifically designed for the protection of high-speed, low-impedance, high-current devices. Its two channels, typically connected in parallel, provide greater protection from transients, while its low capacitance ensures good signal performance from the protected device. The TPSMB12A is particularly well-suited for protecting sensitive electronic signals in applications such as audio processing, industrial machinery, medical equipment and automotive systems.

The TPSMB12A is rated for peak surge current of up to 12A (8/20µs waveform) and a breakdown voltage of 15V. This enables it to protect against voltage transients of up to 15V, as well as providing protection against current surges of up to 12A. The diode is also designed to provide protection against Electrostatic Discharge (ESD) up to 25kV. The TPSMB12A is offered in a small, low-profile 1.2x1.1mm SOD-323F package, making it an ideal choice for use in space-constrained applications.

The TPSMB12A works by providing a path for high-energy transients to be diverted away from sensitive electronic components, and safely discharged to the ground. This is done by creating a Non-Destructive Clamping Action (NDCA), where the voltage across the diode is limited to a specific maximum value (breakdown voltage). When the voltage exceeds the breakdown voltage, the diode “clamps” the voltage to the specified value and absorb the excess energy, thus protecting the connected equipment from the damaging effects of high-energy transients.

In addition to providing protection against over-voltage transients, the TPSMB12A also provides protection against reverse-biased over-voltages. This means that the diode will also protect the connected equipment from voltage transients that are below the normal operating voltage.

In summary, the TPSMB12A is a compact, dual-channel transient voltage protection diode that is designed to protect sensitive electronic components from over-voltage transients, as well as reverse-biased over-voltage transients. Its low-profile SOD-323F package and high surge currents makes it a suitable choice for use in space-constrained applications such as audio processing, industrial machinery, medical equipment and automotive systems.

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