RB481Y-40FHT2R

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RB481Y-40FHT2R Application Field and Working Principle

The RB481Y-40FHT2R is a 4-Channel Diode Array with a reverse blocking microwave power limiter. It belongs to the category of diodes-rectifiers-arrays, allowing the user to use it in numerous applications involving microwave power limiters. The discrete diode is RoHS compliant and UR certified in an operational temperature range of -55 to +125 degrees Celsius.

The maximum peak repetitive reverse voltage for the diode is 40V and the maximum peak forward current is 1A. The maximum peak reverse current is 0.0025A. The maximum forward voltage drop is 1V. The maximum forward surge current is 100A. The maximum dissipation is 150mW. The maximum reverse recovery time is 20ns. It has a zener regulation voltage range of 10 to 20V, with a zener impedance of 100 ohms.

This diode array is much more complex compared to the usual single diode types. It contains an array of four diodes that are connected in series creating a reverse-blocking diode array structure. The circuit looks like a Y-shaped structure, with each arm containing two diodes. It is a microwave power limiter because the current is limited in the reverse direction which makes the diodes act as a limit to the transmitted power level. Thus, it prevents the transmission of large amounts of power into sensitive microwave circuits and components.

The application fields of the RB481Y-40FHT2R are mainly in the microwave power limiting. Applications include tube broadcasting, communications, waveguide power monitoring, and streaming GPS signals from satellites. The waveguide power monitoring system uses this type of diode array, to limit the power fed back from the waveguide and prevent the waveguide from being over-powered. It is primarily used in the up-link frequencies to monitor the power level and ensure the transmissions remain at a safe level.

The working principle of the RB481Y-40FHT2R is quite simple. As previously stated, it is a reverse-blocking diode array. When the operating voltage is applied, the two diodes in each arm of the array become forward-biased and the direct current then flows through the two diodes in one direction. However, when the power level increases, the reverse-blocking diode array structure prevents the current from flowing in the opposite direction.

In conclusion, the RB481Y-40FHT2R is a 4-Channel Diode Array with a reverse blocking microwave power limiter. It is a type of diode that falls within the category of diodes rectifiers arrays. It is mainly used in microwave applications, to limit the power and prevent power overloads. Its simple working principle is based on two diodes connected in series with one another, blocking the current when the power level increases.

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