90MT140KB

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Diodes are electronic elements that are used to control the flow of electricity. Bridge rectifiers are electronic devices that use four diodes to change Alternating Current (AC) electricity into Direct Current (DC) electricity. The 90MT140KB bridge rectifier is a component used to perform full wave rectification in power supplies and converters.

A 90MT140KB bridge rectifier can be thought of as a 4-diode arrangement with two input lines and two output lines and is often seen as an alternative to a full-wave center tapped transformer. It is composed of four discrete diodes that are arranged in an alternating pattern of Cathode and Anode pins; labelled C1-A1-C2-A2. The input voltage is applied across the series of Anode to Cathode pins. All of the Cathode pins are connected together, forming the AC input, while all of the Anode pins are connected together to form the DC output.

The 90MT140KB bridge rectifier is designed to have reverse breakdown voltages of 1000 Volts (V) for each diode and a forward current rating of 14 Amps (A). It is typically used as a full-wave rectifier circuit due to its maximum forward voltage drop of from 0.45 V to 0.75 V. Additionally, its PIV (Peak Inverse Voltage) rating is 1400V. It is important to note that the forward voltage drop increases with increasing forward current.

The 90MT140KB bridge rectifier is typically used in the following applications. One use is to convert 120V AC power to a variable DC voltage supply, such as those supplied to low-powered DC motors, solenoids, light bulbs, etc. Another use is to convert 120V AC to 12V DC for charging batteries, such as those in car batteries, boats, and jet skis.

The working principle is fairly simple: when the 180° cycle of the input AC voltage is applied to the diodes in the bridge rectifier, each diode will alternately become forward and reverse biased. When a diode is forward biased, it will let positive current flow through itself and when it is reverse biased, it will not let any current flow. This causes the current to switch from one side to the other and produce a full-wave rectified output.

Additionally, the bridge rectifier has the added benefit of being less sensitive to changes in transformer secondary voltage, compared to a center-tapped rectifier. This is because there is no need for a center tap that is sensitive to voltage changes. Consequently, since there are no specific voltage ratings for any of the four diodes, the bridge rectifier can be used with a variety of AC voltages.

In conclusion, the 90MT140KB bridge rectifier is a 4-diode device used to convert AC to DC and is used in many consumer electronics and automotive applications. Its reverse breakdown voltage of 1000 Volts and forward current rating of 14 Amps makes it suitable for multiple applications. The bridge rectifier has the advantage of being less sensitive to transformer secondary voltage variations and is able to withstand high temperatures and power surges without any damage. Finally, due to the four diodes involved in its design, the bridge rectifier can provide a full-wave rectified output.

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