TVS - Diodes

1.5KE33A B0G is a type of transient voltage suppressor (TVS) diode, sometimes also referred to as a crowbar diode. It is designed to protect sensitive electronic components from damage caused by transient voltage. Transient voltage is a high-voltage spike, usually caused by lightning, electrical surges, and electro-mechanical activity.

Application Field

1.5KE33A B0G TVS diodes are used in a variety of applications, including automotive electronic control units, electrical appliances, telecommunications, industrial machinery, medical equipment, and home entertainment systems. They are also typically used to protect equipment from electrical power noise, such as spikes, EMI/RFI noise, and power glitches.

Working Principle

When the 1.5KE33A B0G diode is exposed to a transient voltage, it will rapidly change from the “off” state to the “on” state. This action is instantaneous and will clamp down the voltage to the diode’s "breakover voltage”- typically around 55V. Above this voltage, current begins to flow from the voltage source through the diode and into the protected circuit. This limits the amount of voltage experienced by the circuit, thus providing protection.

When the transient voltage reaches the specified trigger, or “breakover”, voltage of the TVS diode, it is clamped down just below the rated standoff voltage. This prevents harm or damage to the sensitive components within the circuit. The diode will clamp and limit the voltage level for a short period of time and will then return to the off state as the transient voltage dissipates.

Conclusion

1.5KE33A B0G TVS diodes are used to protect sensitive electronic components from transient voltage surges. They operate by quickly clamping down high voltage spikes to their “breakover voltage” and limiting the voltage source to the protected circuit for a short period of time. This protection is critical in the modern world where high-voltage spikes can cause permanent damage to sensitive components and systems.