FODM121FR1

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Optoisolators are used as electrical isolators, relying on a light source to transfer signals across a gap or insulation medium between two components. The FODM121FR1 optoisolator is a transistor photovoltaic output device typically found in off-state or on-state applications. This optoisolator has a wide range of potential applications, most notably for discrete devices such as relays or switches, and for low-voltage logic levels.

The FODM121FR1 consists of a to-86 type package with three terminals. It operates over a temperature range from -20 to +90°C and has a minimum isolation voltage rating of 3kVrms. Internally, the isolated Darlington transistor consists of a phototransistor and photodiode. The phototransistor is located adjacent to the adjacent to the photodiode and is light-activated when the photodiode receives light from the LED. It then output an optically isolated, low-voltage stable signal when the transistor is activated.

The FODM121FR1 optoisolator’s working principle is based on the photoconductive effect. When the LED is activated, it emits a bright light that is received by the photodiode. This causes an electric current to flow through the photodiode, which in turn activates the phototransistor, which then outputs an optically isolated signal.

The FODM121FR1’s applications include use in low-level logic circuits, such as logic gates, and for protection of discrete relays and switches in a variety of electrical and electronic equipment. It is also used in a range of Low Voltage Single and Double Pole, Single Throw (SPDT) and Double Pole Double Throw (DPDT) relays. The FODM121FR1 can also used in high-voltage circuits, as its isolation voltage rating of 3kVrms protects against electrical shocks and reduces the risk of short circuits and arcing.

This optoisolator can also be used in security systems and fire detection circuits, providing protection against electrical shocks as well as noise immunity.

The FODM121FR1 optoisolator is popular for its wide range of applications and its small size. It provides excellent isolation characteristics, low voltage requirements, and a long service life. It can operate reliably in a wide range of temperature extremes and environmental conditions, making it highly reliable in a wide range of applications. It is also cost-effective, making it a good choice for many electrical and electronic applications.

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