The Vishay SMAJ30A-E3/61 is a TRANSZORB Transient Voltage Suppressor (TVS) designed for protecting sensitive electronics from voltage transients induced by inductive load switching and lightning. It features a low profile package suitable for automated placement, making it ideal for high-density circuit boards. The device is available in both unidirectional and bidirectional configurations, providing flexibility in addressing different circuit protection needs.
The SMAJ30A-E3/61 is characterized by its 400W peak pulse power capability with a 10/1000 μs waveform, offering robust protection against high energy transients. It has a maximum clamping voltage of 48.4V, ensuring effective suppression of overvoltages. The component is glass passivated, which enhances its reliability and longevity by protecting the semiconductor junction from environmental factors.
Transient Voltage Suppressors
Transient Voltage Suppressors (TVS) are semiconductor devices designed to protect sensitive electronics from voltage spikes and surges. They work by clamping overvoltages to a safe level that the protected circuit can withstand, preventing damage to the electronic components. TVS devices are critical in applications where reliability and safety are paramount, such as in automotive, industrial, and telecommunication systems.
When selecting a TVS for a specific application, engineers should consider parameters such as the stand-off voltage, peak pulse power, clamping voltage, and package type. The stand-off voltage should be higher than the normal operating voltage of the circuit but lower than the voltage at which damage occurs. The peak pulse power indicates the maximum transient energy the TVS can absorb, while the clamping voltage defines the maximum voltage level to which the TVS will limit the transient.
Other important factors include the TVS response time, which should be as fast as possible to effectively protect against fast transients, and the device's thermal characteristics, which determine how well it can dissipate the heat generated during a transient event. Additionally, the package type and size may be critical for applications with space constraints or specific mounting requirements.
In summary, TVS devices are essential for protecting electronic circuits from voltage transients. Proper selection and implementation can significantly enhance the reliability and longevity of electronic systems, safeguarding them against potentially damaging electrical surges.