3N253-E4/72

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Diodes - Bridge Rectifiers are commonly used in electrical circuits to convert alternating current (AC) to direct current (DC). One type of diode bridge rectifier is the 3N253-E4/72, a four-diode bridge rectifier which has a maximum rated current of 2A and a peak repetitive reverse voltage of 400V.

Application

The 3N253-E4/72 bridge rectifier is usually used in applications that require rectifying power in either alternating or pulsating current. It is primarily used for household appliances such as electric motors, fluorescent lights, heaters, power drills and air conditioners. Additionally, it is also used in automotive and industrial applications such as UPS systems, welding equipment and circuit breakers.

Construction

Analysing the internal components of the 3N253-E4/72 reveals four individual diodes connected in a bridge rectifier arrangement. The rectifier utilizes two discrete semiconductor P-N-P-N junction diodes, which are known as the positive (Anode) and the negative (Cathode) diodes. Each of these diodes has an anode/cathode-rating of 200V and a current rating of 2A. The four diodes are connected in a bridge fashion such that they can convert AC power into DC power.

Circuit Symbol

The symbol for a four-phase diode bridge rectifier such as the 3N253-E4/72 is given below.

Working Principle

The 3N253-E4/72 bridge operates as a full-wave rectifier, converting alternating current power into direct current power. When the primary AC voltage is applied across the diode bridges, one type of diode (the positive P-N-P-N diode) will conduct while the other type of diode (the negative P-N-P-N diode) will be reverse biased. This allows the current to flow in one direction only, resulting in the current being rectified. During the negative half-cycle of the AC waveform, the diode bridge behaves in the similar fashion, but the opposite diodes are conducting. This ensures that current will only flow in one direction during each cycle, resulting in a DC waveform.

Conclusion

The 3N253-E4/72 bridge rectifier is an effective and reliable way to convert alternating current power into direct current power. It utilizes four diodes connected in a bridge rectifier configuration, which allow it to rectify current in both the alternating and pulsating current circuits. It is able to handle voltage and current levels up to 400 volts and 2 amps, respectively. The 3N253-E4/72 is mostly applied in household appliances, UPS systems, welding equipment, circuit breakers and other electrical applications.

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