SA11HE3/54

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TVS – Diodes have myriad applications ranging from protection circuits to electrical and mechanical equipment as well as industrial systems. One such device is the SA11HE3/54. These unidirectional electronic components protect against surges and are commonly used in industrial and medical systems.

SA11HE3/54s are mainly designed for protection against transients like high-energy pulse and other short-duration overvoltage events. They are ideal for protecting electrical equipment from damage caused by lightning strikes and line switching transients. The device has a low clamping voltage, high surge capability, and fast response time compared to other protection elements like Metallized Polyester Film Capacitors or Polypropylene Film Capacitors.

These devices are cylindrical and are composed of an anode, a cathode, and a dielectric-encapsulated semiconductor junction. At the center of the device is a back-biased semiconductor junction. Between the semiconductor junction and the internal anode is a dielectric material which prevents the free flow of electricity. The semiconductor junction acts as a capacitor which stores energy from the surge and dissipates it as heat. When a surge occurs such as a lightning strike or line switching transients, the voltage builds up quickly, allowing the internal capacitor to draw energy from the surge and store it.

When the tripped voltage is higher than the reference voltage, the energy stored is then released to the anode in a controlled manner while at the same time, preventing any damaging current from entering the protected equipment. The device also has the ability to re-set itself after the surge is dissipated, allowing it to continue protecting the system from any further surges. What’s more, the device is shockproof and also has deep level traps, making it an ideal choice for systems that may be subject to shock and vibration.

In summary, some of the key features of the SA11HE3/54 include its low clamping voltage, high surge capability, and fast response time. This makes it suitable for a wide range of protection applications, such as protection circuits, medical systems, and electrical and mechanical equipment. The device also boosts safety through its shockproof construction. Finally, its deep level traps make it ideal for systems that may be subject to shock and vibration.

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