SMS7621-081LF

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The SMS7621-081LF is an RF Diode that is mainly used in applications that require RF performance, such as microwave links, AM/FM and other communication systems, and that demand low antenna resistances and small package sizes. Typically, it is used as an attenuator or as a source of isolation between two systems. It is a two-port device, meaning that it is designed to be connected to two circuits and that can establish communication between them, passing through signals in one direction (one-way communication) or both (two-way communication).

The SMS7621-081LF is a surface mounted diode made of gold and aluminum nickel alloy. Its maximum reverse voltage is 18V, and its maximum forward current is 0.5mA. Its resistance varies from 33 ohms in its high frequency limiting state (150-300 MHz) to 500 ohms in its low frequency limiting state (1-50 MHz).

The application fields of this RF Diode include telecommunications, microwave transmission, and microwave engineering. Examples of applications are:

• As an attenuator in microwave systems, it is used to reduce the power level of the signals transmitted.
• As an isolator in two-way communication systems, it is used to increase the isolation between two systems and prevent feedback loops.
• As a limiter in AM/FM and other communication systems, it is used to reduce unwanted high frequency noise.

The working principle of the SMS7621-081LF RF Diode is based on the depletion effect. This effect produces a decrease in conductance when the applied reverse voltage increases, or a decrease in resistance when the applied forward voltage increases. This property is a consequence of the internal construction of the diode, and is exploited in power supplying and several electronic applications because it limits the maximum amount of current that can pass through the diode.

The SMS7621-081LF is a surface-mount diode that has a wide range of uses in the communications field. It is a two-port device and its performance is based on the depletion effect, producing an effect of limiting current when the diode is forward biased or an attenuation effect when it is reverse biased. This RF Diode is mainly used in microwave links, AM/FM and other communication systems as an attenuator, limiter or isolator.

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