MOC8021

Transistor, Photovoltaic Output Optoisolators Overview

The MOC8021 is a single-channel optocoupler manufactured by Isocom Components, featuring an infrared LED input and a Darlington transistor output. It provides high isolation voltage for circuit protection. The device is designed for surface mount or through-hole applications depending on the suffix variant. Key electrical characteristics include a collector-emitter breakdown voltage of 80V and a peak forward current rating of 60mA. The unit offers a minimum current transfer ratio to ensure reliable switching performance in digital isolation circuits.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an infrared emitting diode with a high-gain Darlington phototransistor array for enhanced signal transmission.
• Provides robust electrical isolation between input control logic and output load circuits.
• Complies with international safety standards including UL recognition and VDE approval for industrial use.

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring galvanic isolation
• Solid-state relay driver circuits
• Microcontroller interface isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific package suffix (e.g., SMD vs DIP) against the design schematic to ensure mechanical compatibility. Confirm that the Darlington output configuration meets the load current requirements of the application. Check for RoHS compliance status if environmental regulations apply to the manufacturing process. Ensure the isolation voltage rating exceeds the system's transient overvoltage expectations.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high current gain is required from a low input drive current. The Darlington output structure allows for direct interfacing with logic gates without additional amplification stages. Consider thermal dissipation capabilities if operating near maximum ratings. Evaluate the trade-off between switching speed and gain, as Darlington configurations typically exhibit slower response times compared to standard phototransistors.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the MOC805 series of optically coupled isolators produced by Isocom Components. The series is characterized by its use of gallium arsenide LEDs and silicon photodetectors. These components are widely utilized in environments where noise immunity and electrical safety are critical. The MOC8021 specifically targets applications needing moderate switching speeds with high output drive capability.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Cross-reference with MOC8050 variants from other manufacturers for pin-compatible alternatives. Verify that substitute parts maintain equivalent isolation voltage and current transfer ratio specifications. Ensure that any replacement component supports the same mounting style and complies with relevant safety certifications.