MOC8111TM

Transistor, Photovoltaic Output Optoisolators Overview

The MOC8111TM is a single-channel optoisolator manufactured by Fairchild Semiconductor. It consists of a Gallium Arsenide infrared emitting diode coupled with an NPN phototransistor, featuring no base connection to the external pin for improved noise immunity. The device provides high isolation voltage of 7500Vpk and operates with DC input. Key electrical parameters include a minimum current transfer ratio of 20% at 10mA forward current and a minimum collector-emitter breakdown voltage (BVCEO) of 70 Volts. It is housed in a 6-DIP package.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High isolation voltage capability of 7500Vpk peak
• NPN phototransistor output with unconnected base for enhanced noise immunity
• UL recognized and IEC60747-5-2 approved
• Specified maximum switching time in saturation

Transistor, Photovoltaic Output Optoisolators Applications

• Power supply regulators
• Digital logic inputs
• Microprocessor inputs
• Appliance sensor systems
• Industrial controls

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify component authenticity as the MOC8111TM may be listed as obsolete or superseded by newer revisions such as the MOC8111TVM. Confirm that the specific suffix matches the required isolation rating and packaging type. Ensure documentation references Fairchild Semiconductor or Microchip USA specifications. Check for RoHS compliance status if required for modern assembly processes. Validate part markings against official datasheet images to prevent counterfeit substitution.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when robust electrical separation is required between control and power circuits. The unconnected base design offers superior noise immunity compared to connected-base alternatives. Choose based on the required current transfer ratio group; the MOC8111M variant specifies a minimum 20% CTR. Ensure the 6-DIP through-hole package fits the PCB layout constraints. Verify that the 70V BVCEO meets the circuit's voltage requirements.

Transistor, Photovoltaic Output Optoisolators Part Context

The MOC8111TM belongs to the MOC811XM series of 6-pin DIP optocouplers designed for power supply applications. This series includes variants with different current transfer ratios, such as the MOC8112M (50% min) and MOC8113M (100% min). These devices are widely used in industrial and consumer electronics where galvanic isolation is critical for safety and signal integrity.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers include MOC8111TVM. Other compatible series members within the same family are MOC8112M and MOC8113M, which share similar physical characteristics but differ in current transfer ratio specifications.