SE70PDHM3_A/I

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SE70PDHM3_A/I is a Diode - Rectifier - Single from ON Semiconductor, which falls into the general category of rectifier diodes. This type of diode is a semiconductor device which converts alternating current (AC) to direct current (DC). They are used in power supplies and other power management applications. They are also used in audio applications, where they reduce distortion and improve fidelity.

Application Field

The SE70PDHM3_A/I is a single-phase, 30A, 700V power rectifier. It is suitable for applications such as switch mode power supplies, bridge rectifiers and UPS systems. It is designed for high efficiency, high power applications and has a low forward voltage drop and low junction temperature, making it suitable for higher power circuit designs. The SE70PDHM3_A/I also has a low leakage current and a high surge current ratings, making it suitable for high reliability designs.

Working Principle

Rectifier diodes like the SE70PDHM3_A/I work by allowing only the positive half of an alternating current wave to pass through to its output. This is achieved by using a junction between two semiconductor materials, where the majority of current flow is in the N (negative) direction. When an AC wave passes through this semiconductor junction, the forward bias created by the P (positive) side of the junction allows the positive half of the wave to flow through while the negative half is "blocked out" and no current passes in the opposite direction.

Once the current passes through the diode junction, the DC voltage will be the same as the peak voltage of the AC wave. Rectifier diodes like the SE70PDHM3_A/I also have a reverse current blocking capability, allowing them to also be used in power management applications as protection elements for components that should not be affected by reverse current.

The SE70PDHM3_A/I single-phase, 30A, 700V power rectifier has a superior reverse current blocking capability and low junction temperature, making it suitable for high efficiency, high power applications. Additionally, the diode has a low forward voltage drop and a large surge current rating, making it suitable for higher power device designs.

Advantages

The SE70PDHM3_A/I comes with built-in protection elements and has a low reverse leakage current when compared to other diodes. The low junction temperature and superior reverse current blocking capability make it suitable for high efficiency and high power applications. The low forward voltage drop and large surge current rating also make it suitable for higher power device designs, while the low forward voltage drop also helps reduce switch-mode power supplies’ number of connected components as it absorbs the stray inductance.

The SE70PDHM3_A/I can also be used in audio applications, as it will reduce distortion and improve fidelity due to its low leakage current. Moreover, its low junction temperature and superior reverse blocking capability make it suitable for automotive and telecom applications.

Disadvantages

Like other diodes, the SE70PDHM3_A/I has a few disadvantages. One of them is its sensitivity to mechanical shock, which can cause the diode to be damaged or even destroyed. Additionally, as diodes tend to generate heat, they require additional thermal management components such as heat sinks to prevent thermal runaway that could damage other components.

Due to its large surge current rating, the SE70PDHM3_A/I may also require additional circuitry to protect itself and other components from the over-currents created by excessive power spikes. This may require extra parts and complexity.

Finally, diodes like the SE70PDHM3_A/I can introduce a small degree of distortion, which can be audible in audio applications. This can be reduced by using a combination of different diodes and audio-grade capacitors.

Conclusion

The SE70PDHM3_A/I is a single-phase, 30A, 700V power rectifier from ON Semiconductor. Thanks to its low forward voltage drop and low junction temperature, it is suitable for high efficiency, high power applications. Additionally, its reverse current blocking capability makes it suitable for power management applications, while its low leakage current and high surge current ratings make it suitable for high reliability designs and audio applications

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