CD214B-T26CALF Circuit Protection

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Transient Voltage Suppressors (TVS) are widely used semiconductor components designed to protect sensitive electronic components from electrical over stress. They are typically used to protect microcircuits, power supplies, relays, and many other sensitive electrical components. The CD214B-T26CALF is one of the most popular types of TVS available on the market. This article will discuss the application fields and working principles of the CD214B-T26CALF.

Application Fields

The CD214B-T26CALF is a unidirectional TVS designed to protect sensitive devices from high voltage surges, ESD, and other transient voltage problems. It is ideally suited for applications such as power supplies, automotive ECUs, and telecommunications applications. It also offers robust protection for sensitive circuits when used in isolated systems such as power over Ethernet (PoE).

The CD214B-T26CALF offers excellent transient protection capability and its reverse breakdown voltage is rated at 200V. Its design parameters are optimized to achieve high ESD protection capability, fast response, and low leakage. It also has a wide operating temperature range, from -55°C to +150°C.

Working Principle

The CD214B-T26CALF is a unidirectional TVS, meaning it can only conduct current in one direction. It has a high breakdown voltage, which is the voltage at which the device conducts current. In normal circumstances, when the voltage applied across the TVS is below the breakdown voltage, the device remains non-conductive. However, once the voltage rises above the breakdown voltage, the device conducts current and thus dissipates the excess energy.

The TVS is designed to withstand both surge currents and constant current. During a surge current event, the device responds quickly to clamp the voltage below the breakdown voltage. This is because of its low clamping voltage (VCL) and its fast response time (tS). On the other hand, during a constant current event, the device conducts current equally in both directions. This results in a lower power dissipation and minimal damage to the device.

The CD214B-T26CALF has an excellent thermal resistance, allowing it to efficiently dissipate heat in order to protect sensitive components from damage caused by overvoltage or overcurrent events. It also features a built-in drain-source diode, which helps to improve the TVS’s stability and reliability.

Conclusion

The CD214B-T26CALF is a unidirectional TVS designed to protect sensitive electronic components from transient voltage problems. It offers robust protection features, including a high breakdown voltage, low VCL, fast tS, and excellent thermal resistance. The TVS is ideally suited for applications such as power supplies, automotive ECUs, and telecommunications. The device is highly reliable and provides superior protection for sensitive components.

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