OPIA803DTU

Overview

The OPIA803DTU is a single-channel transistor output optocoupler manufactured by TT Electronics/Optek Technology. It features a Photodarlington output configuration housed in an 8-DIP package with through-hole mounting. The device provides a high insulation voltage of 2500 Vrms, ensuring robust isolation for sensitive electronics. Key electrical parameters include a maximum collector-emitter saturation voltage of 1 V and a peak forward current rating of 50 mA. The unit operates within a temperature range of -30°C to +100°C and dissipates up to 200 mW of power.

Feature Summary

• Provides galvanic isolation between input and output circuits via an internal LED and photodarlington sensor.
• Features a dedicated base pin on the output transistor to facilitate faster switching speeds and improved load handling capabilities.
• Utilizes an 8-pin DIP package designed for standard through-hole PCB assembly techniques.

Applications

• Industrial control systems requiring signal isolation
• Power supply feedback loops
• Solid-state relay driver circuits

Procurement Notes

Verify component authenticity against official TT Electronics/Optek Technology documentation. Confirm that the 8-DIP package matches your board layout requirements. Ensure the 2500 Vrms isolation rating meets your specific safety standards. Check for any recent product change notices or end-of-life announcements from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when high isolation voltage is required alongside fast switching performance provided by the base-driven output. Compare the 2500 Vrms rating against lower-voltage alternatives if system constraints allow. Consider the 8-DIP footprint during schematic capture to ensure compatibility with existing manufacturing processes and available PCB real estate.

Part Context

This part belongs to the OPI series of optoisolators from TT Electronics/Optek Technology. The series focuses on providing reliable isolation solutions for various electronic applications. The OPIA803DTU specifically targets designs needing robust voltage separation and efficient signal transmission across isolated boundaries using a transistor output structure.

Replacement Considerations

Consult official manufacturer substitution guides for verified equivalents. Cross-reference pinouts and isolation ratings carefully. Verify that any substitute maintains the 8-DIP form factor and 2500 Vrms specification.

FAQ

What is the purpose of the base terminal on the output transistor?

The base terminal allows for external biasing or pull-down connections, enabling faster turn-off times and better control over the output state compared to standard two-terminal phototransistors.

What is the maximum operating temperature for this optocoupler?

The maximum operating temperature is +100°C, as specified in the thermal characteristics.