SFH600-1X007T

Optoisolators are electrical devices that use a light source to isolate two circuits. Amongst the different types of optoisolators available, SFH600-1X007T belongs to the transistors, photovoltaic output category. This type of optoisolator allows for a lower input current and provides greater isolation.

The SFH600-1X007T optoisolator consists of a photosensitive device that is housed in a 6-pin dual-in-line package. The device includes an infrared emitting diode (IRED), a photovoltaic transistor output, and two back-to-back uncommitted diodes that form a transient voltage suppression network.

Application Field

The SFH600-1X007T optoisolator is used for isolating two interconnected circuits. The transistors, photovoltaic output type is suitable for applications where space is limited and low energy is needed as the input current. This type of optoisolator is particularly suitable for medical, industrial or automotive fields and for applications such as data transmission and isolation of high-impedance signals. It can also be used in low-level sensing systems, or for motors, actuators, and control circuit applications.

Working Principle

The working principle of the SFH600-1X007T photovoltaic output optoisolator relies on the light-sensitive transistor at the device’s input, used for isolating the output circuit. The IRED emits light when a voltage is applied to the input pins, which is then received by the photovoltaic transistor through the gap in the package, where it is converted to a corresponding current.

The output of the optoisolator is then determined by the current flowing through the transistor base, which is in turn determined by the input voltage. The current is then amplified by the transistor, allowing the output circuit to be isolated from the input.

The back-to-back diodes inside the package provide transient voltage suppression, which helps to maintain the integrity of the circuit. They also provide an extra protection against electro-magnetic interference.

Conclusion

The SFH600-1X007T optoisolator is a transistors, photovoltaic output type of optoisolator that is used for isolating circuits with low-level signals and currents. It is suitable for many applications, from data transmission and motor control circuits, to medical and automotive fields. It has two back-to-back diodes inside the package that provide voltage suppression and EMI protection.