IL1208AT

Transistor, Photovoltaic Output Optoisolators Overview

The IL1208AT is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates a gallium arsenide infrared LED with a silicon NPN phototransistor featuring a base connection for enhanced switching speed. The device operates within a temperature range of -55 °C to +110 °C and provides an isolation voltage of 4000 Vrms. Key electrical parameters include a minimum current transfer ratio of 160%, a maximum collector-emitter breakdown voltage of 70 V, and a maximum forward current of 60 mA. It is housed in an SOIC-8 surface-mount package.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates a gallium arsenide infrared LED with a silicon NPN phototransistor
• Includes a dedicated base connection on the phototransistor for improved switching performance
• Provides high insulation capability rated at 4000 Vrms
• Designed for operation in extended industrial temperature environments up to 110 °C

Transistor, Photovoltaic Output Optoisolators Applications

• General-purpose signal isolation in electronic circuits
• Interface between microcontrollers and high-voltage loads
• Industrial control systems requiring galvanic isolation
• Power supply feedback loops

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify that the specific order matches the IL1208AT designation to ensure the correct current transfer ratio range of 160% to 320%. Confirm the package type is SOIC-8 and check for RoHS compliance status as required by project specifications. Ensure handling procedures account for the sensitivity of the internal LED component during assembly.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a higher current transfer ratio than standard variants is required, specifically the 160% minimum threshold. The integrated base terminal allows for faster turn-off times compared to standard phototransistors. Consider the 70 V collector-emitter voltage rating for load compatibility and verify that the 4000 Vrms isolation meets the safety requirements of the target application circuit.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the Vishay 1206AT/1207AT/1208AT series of optocouplers. These devices share a common architectural design utilizing a gallium arsenide LED and silicon NPN phototransistor pair. They are distinguished primarily by their current transfer ratio specifications, with the IL1208AT representing the high-gain variant within this family.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitutes include IL1206AT and IL1207AT from the same Vishay series. Note that these alternatives offer different current transfer ratios and may not provide the same gain characteristics. Verify pinout compatibility and thermal ratings before substitution.