SMCJ40AHE3/9AT

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TVS - Diodes

Transient Voltage Suppressors (TVS) diodes are used to protect sensitive electronic components against electrical transients caused by lightning, induction and switching processes. These devices are designed to absorb surge current and the resulting voltage spike quickly without disrupting connected systems. The SMCJ40AHE3/9AT is one of the latest advancements in TVS Technology.

SMCJ40AHE3/9AT Application Field

The main application field for the SMCJ40AHE3/9AT is protection against transients in automotive electrical systems and low-voltage power supplies. The device is rated for up to 36 Volts and delivers 40A of peak pulse and 9A of continuous current without sustained thermal run-away or avalanche. The low on-state resistance and fast response time of the SMCJ40AHE3/9AT make it well suited for a variety of automotive applications.

SMCJ40AHE3/9AT Working Principle

In order to achieve its peak performance, the SMCJ40AHE3/9AT utilizes a combination of a Zener diode and a bipolar transistor structure. The Zener diode contains breakdown material that triggers a current interruption when the device encounters a voltage spike. This interrupts the current and the transistor switches on to absorb the energy from the transient. The Zener diode helps to contain the voltage spike while the transistor helps to dissipate the energy into the connected circuit.

When the voltage spike has been successfully dissipated, the Zener diode releases its grip on the current, allowing it to flow again through the voltage regulator. As a result, the system is left unharmed and can continue operating without disruption. The SMCJ40AHE3/9AT can easily handle up to nine thousand volts of surge energy for automotive electrical systems and low-voltage power supplies.

Conclusion

The SMCJ40AHE3/9AT is an essential component of any automotive electrical system or low-voltage power supply due to its ability to protect against high voltage transients. The combination of the Zener diode and bipolar transistor allows the device to provide 20kW of peak pulse power protection and 9A of continuous current. This combination ensures that the systems connected to the SMCJ40AHE3/9AT will remain protected from voltage spikes, allowing them to continue operating without disruption.

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