MOC256M

Transistor, Photovoltaic Output Optoisolators Overview

The MOC256M is an AC input phototransistor optocoupler designed for signal detection and monitoring. It features two infrared emitters and a phototransistor output in an SOIC-8 package. Key electrical characteristics include a minimum Current Transfer Ratio (CTR) of 20% at 10mA forward current and a maximum collector-emitter voltage of 30V. The device guarantees a CTR symmetry of 2:1 maximum, ensuring balanced performance for bidirectional AC inputs.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Bidirectional AC input capability with protection against reversed DC bias
• Guaranteed CTR symmetry of 2:1 maximum for consistent signal transfer
• Convenient plastic SOIC-8 surface mountable footprint

Transistor, Photovoltaic Output Optoisolators Applications

• AC signal detection circuits
• AC signal monitoring systems
• Solid-state relay driver interfaces

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the manufacturer marking on the component body to confirm it is an ON Semiconductor product, as Fairchild Semiconductor was acquired by ON Semiconductor. Ensure the ordering suffix matches the specific tape-and-reel or tube configuration required for your assembly process. Cross-reference the date code and lot number with the supplier's certificate of conformity to ensure traceability and compliance with RoHS directives.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when bidirectional AC input handling is required without external rectification. The guaranteed CTR symmetry simplifies design calculations for AC zero-crossing detection or phase control applications. Verify that the SOIC-8 thermal dissipation capabilities meet the system's power requirements under continuous operation conditions.

Transistor, Photovoltaic Output Optoisolators Part Context

This device belongs to the family of AC input optocouplers utilizing dual emitter technology to enable symmetrical conduction during both positive and negative half-cycles of an AC waveform. It serves as a direct replacement for legacy discrete AC sensing solutions, offering improved reliability and reduced board space through integrated isolation.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Check pinout compatibility with existing PCB layouts. Verify that the replacement part maintains the same isolation voltage ratings and CTR specifications to ensure circuit functionality remains unchanged.