P4SMA12CAHE3/61 Circuit Protection

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TVS-Diodes or Transient Voltage Suppressors are an important part of any electrical circuit. They are used to protect circuit components from damaging overvoltage surges. The P4SMA12CAHE3/61, a TVS-Diode developed by Littelfuse, is a 12V, 1500W bidirectional transient voltage surge suppressor designed to protect sensitive electronic circuits from voltage transients in the range of 5V to 13.6V.

The P4SMA12CAHE3/61 TVS-Diode is commonly used in automotive applications such as back-up systems, industrial equipment, and audio/video systems. It has a 20 MΩ impedance at 0V and lead lengths of 5±0.5mm. The diode is also capable of dissipating a surge energy of 1500W peak pulse power. In addition, the P4SMA12CAHE3/61 has a RoHS-compliance being a lead-free, halogen-free device.

The P4SMA12CAHE3/61 is constructed from an alumina ceramic substrate material with an overlying layer of aluminum nitride which increases the TVS-Diode’s high breakdown voltage as well as its response time. This makes the diode ideal for high voltage applications. The device also features a zener breakdown diode, which is designed to clamp the reverse voltage to a known value, thus preventing damage to the circuit during overvoltage transients.

The P4SMA12CAHE3/61 works by safely clamping and dissipating surge currents caused by overvoltage transients. When an overvoltage transient occurs, the device registers the voltage and amps the surge current is carrying and then limit the current by diverting it through the limiting resistor. This limits the maximum reverse voltage to a known value, thus protecting the circuit components from any potential damage due to the overvoltage transient.

The P4SMA12CAHE3/61 TVS-Diode is designed to protect a various range of electrical and electronic devices from overvoltage transients, as well as to provide long-term circuit protection. The diode is highly reliable and durable, with a typical service life of tens of thousands of hours. The P4SMA12CAHE3/61 is ideal for use in a variety of automotive, industrial, and audio/video applications that need protection from overvoltage transients.

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