1SMA4749HM2G

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The 1SMA4749HM2G is a Zener diode from the series of transient voltage suppressors. This component is a single diode, meaning it is made up of two terminals: an anode (positive charge) and a cathode (negative charge). This indicates that this component is a diode, and specifically, a Zener diode, meaning it uses the property of reverse breakdown to regulate voltage.

The 1SMA4749HM2G is a “super-fast” diode designed for “spike-overload” protection. Zener diodes have a low internal resistance, meaning that short and transient voltage spikes are quickly discharged to ground and thus prevented from damaging the protected circuit. The 1SMA4749HM2G also has a power rating of 1.3 Watts and a maximum standoff voltage of 48 Volts, meaning it can absorb and dissipate high levels of excess energy.

The application field of the 1SMA4749HM2G is broad. It can be used in virtually any electronic device that requires voltage regulation. This includes computers, electronic lighting systems, power supplies, telecommunication equipment, and more. Due to its low internal resistance, the 1SMA4749HM2G can be used to protect against spikes, surges, and transients in voltage.

The working principle of the 1SMA4749HM2G is based on reverse breakdown. When a diode is reverse biased and the voltage reaches the breakdown voltage (VZ for a Zener diode), the electrical current breaks through the junction, allowing the current to flow in the opposite direction (reverse breakdown) and reducing the voltage level across the elements.

The 1SMA4749HM2G also has a “clamping voltage” which is the voltage level that is maintained across the diode when it starts conducting during a voltage surge. This voltage decreases as the surge dissipates, allowing the diode to act as a regulator of the voltage level. As a result, the 1SMA4749HM2G can be used in a number of applications requiring the regulation or protection of voltage.

In conclusion, the 1SMA4749HM2G is a Zener diode used in a wide range of applications requiring the regulation or protection of voltage. It works on the principle of reverse breakdown, allowing the electrical current to flow in the opposite direction and regulating the voltage level across the elements. As such, it is an ideal component for surge, spike, and transient protection.

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