LDA111STR

Transistor, Photovoltaic Output Optoisolators Overview

The LDA111STR is a single-channel optocoupler from the Littelfuse LDA series, featuring a unidirectional input and a Darlington transistor output. It provides an isolation voltage of 3750Vrms and supports continuous load currents up to 100mA. Key electrical parameters include a minimum breakdown voltage (BVCEO) of 30V, a typical current transfer ratio of 8500%, and a maximum saturation voltage of 1V. The device operates with an input control current of 1mA and is available in a compact 6-pin package suitable for through-hole or surface mount applications.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Unidirectional input configuration with single Darlington transistor output
• High isolation voltage rating of 3750Vrms for circuit protection
• Compact 6-pin package design supporting both through-hole and surface mount mounting methods

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial automation control circuits
• Communication and data transmission interfaces
• Consumer electronic device signal isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific ordering suffix to confirm the tape and reel packaging format associated with the STR designation. Ensure compatibility with automated pick-and-place equipment if surface mount assembly is required. Confirm that the 6-pin package dimensions align with the target PCB footprint. Validate that the 3750Vrms isolation rating meets the safety requirements of the end application environment.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high current transfer ratio is required for efficient signal switching. The Darlington output structure allows for driving higher loads compared to standard phototransistors. Consider the 30V breakdown voltage limit when designing collector-emitter circuits. The unidirectional input simplifies driver interface design by eliminating reverse voltage concerns within specified limits.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the LDA series of single optocouplers manufactured by Littelfuse. The series includes variants with different output configurations and packaging options. The LDA111 specifically utilizes a Darlington pair for enhanced gain. The STR suffix indicates a specific reel-based packaging variant intended for high-volume surface mount production lines.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Cross-reference with other single-channel Darlington output optocouplers offering similar 3750Vrms isolation. Verify pinout compatibility before substitution. Check if alternative parts meet the 8500% typical current transfer ratio requirement. Ensure the replacement device supports the same 6-pin package style for mechanical fit.