MOC8080SD

Transistor, Photovoltaic Output Optoisolators Overview

The MOC8080SD is a single-channel optocoupler from onsemi featuring a Darlington transistor output with an accessible base terminal. It utilizes a gallium arsenide infrared LED coupled to a high-gain Darlington phototransistor within a compact 6-SMD (Gull Wing) package. The device provides robust electrical isolation rated at 5300Vrms, ensuring safety in high-voltage environments. Designed for direct interface with logic circuits, it offers high current transfer ratios and operates reliably across an extended temperature range of -40°C to +100°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrated Darlington output configuration with exposed base pin for enhanced control flexibility
• High isolation voltage rating suitable for demanding industrial safety applications
• Compact surface-mount packaging optimized for automated assembly processes

Transistor, Photovoltaic Output Optoisolators Applications

• Solid-state relay driver circuits
• Industrial process control signal isolation
• Microcontroller interface for high-side switching

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'SD' corresponds to the 6-SMD Gull Wing package variant when sourcing. Confirm that the Darlington output type matches system requirements, as it differs significantly from standard phototransistor or photovoltaic outputs. Ensure compatibility with peak forward current limits during transient conditions.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high gain is required without external amplification. The accessible base allows for speed adjustment or noise immunity tuning. Compare against standard MOC8050 variants if through-hole mounting is preferred instead of surface mount. Validate thermal management capabilities given the higher power dissipation typical of Darlington structures compared to single transistors.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the MOC series of optocouplers, widely used for galvanic isolation. Unlike the MOC8050 which uses a standard phototransistor, the MOC8080SD employs a Darlington pair for superior current gain. The SD suffix specifically denotes the surface-mount gull-wing footprint, distinguishing it from through-hole MDIP versions.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

• MOC8050 (requires package change to MDIP)
• PC817 (verify CTR and isolation voltage differences)

Transistor, Photovoltaic Output Optoisolators FAQ

What is the function of the third pin on the output side?

The third pin connects to the base of the internal Darlington transistor, allowing users to adjust switching speed or improve noise immunity by applying external bias.

Is this component suitable for AC input signals?

No, the internal infrared LED requires DC input. AC signals must be rectified before driving the input side.