TPSMB13A Circuit Protection

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Transient Voltage Suppressor (TVS) diodes, otherwise known as ‘transient voltage protection devices’, are designed to protect sensitive electronic components against over voltages. The TPSMB13A is a surface mount rated 9A protective thyristor switch (SCR) based on a silicone diac. As such, it is able to protect your inputs, as well as your outputs, from any electrical fault.

In terms of applications, the TPSMB13A is mainly used for reversing electrical polarity, surge tests, EMI/RFI filters, and as a circuit breaker. It is especially popular for various industrial, automotive, and aerospace applications, where it provides effective solutions to transient over or under voltage conditions. The TPSMB13A also has an impressive stand off voltage of 500V.

In terms of its working principle, the TPSMB13A, as mentioned earlier, is a 9A sized SCR diac. It includes two separate devices, basically a PN or PNP SCR diode and an SCR switch. The PN or PNP SCR diode acts as a voltage sensing element. It is usually located between two AC lines, where it senses over voltages, and triggers the SCR switch, which in turn activates the SCR diac.

When a voltage surge occurs, the PN or PNP SCR diode detects it and, depending on the magnitude of the surge, activates the SCR switch. This then triggers the SCR diac, which is then responsible for limiting the transient voltage below a certain threshold voltage. In this way, the TPSMB13A is able to protect the system from any voltage surges from damaging sensitive components.

Another advantage of the TPSMB13A is its double sensing capability. It is capable of both positive and negative transient voltage protection, ensuring that no damage occurs during either polarity. Additionally, it is also able to monitor and control the power supply polarity within the system, providing a much needed solution to various systems where a stable DC supply is critical.

Overall, the TPSMB13A is an excellent choice for any system that requires transient voltage protection and polarity sensing capabilities. The SCR diac is highly accurate and reliable, allowing for extremely low failure rates and ensured tenacity even in the most extreme environments.

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