LDA111S

Transistor, Photovoltaic Output Optoisolators Overview

The LDA111S is a single-channel optocoupler featuring a Darlington transistor output configuration. It provides electrical isolation between input and output circuits with a minimum breakdown voltage of 30V. The device supports both AC and DC input applications, utilizing an infrared LED for optical coupling. Key electrical characteristics include a typical current transfer ratio of 8500% and a maximum saturation voltage of 1V. The input control current rating is specified at 1mA. This component is housed in a 6-pin DIP SMD package, designed for compact circuit integration where signal isolation is required.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Single-channel optocoupler with Darlington transistor output
• Supports AC or DC input circuit configurations
• High current transfer ratio for efficient signal transmission
• Compact 6-pin surface mount DIP package

Transistor, Photovoltaic Output Optoisolators Applications

• Signal isolation in industrial control systems
• Interface circuits for microprocessor-based systems
• Power supply feedback loops
• Switching applications requiring high gain

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific manufacturer designation as sources may list this part under IXYS Integrated Circuits due to corporate acquisitions. Confirm availability status as some distributors indicate end-of-life or zero stock conditions. Ensure the ordering suffix matches the required package type and check for any updated datasheet revisions that may affect pinout or electrical ratings before finalizing procurement.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a high current transfer ratio is necessary to drive loads with minimal input current. The Darlington output structure offers higher gain compared to standard transistor outputs, making it suitable for low-level signal detection. Consider the 30V breakdown voltage limit for isolation requirements. Evaluate the 6-pin SMD footprint against board space constraints and verify thermal management needs for the specific application environment.

Transistor, Photovoltaic Output Optoisolators Part Context

The LDA111S belongs to the LDA series of single optocouplers manufactured by Littelfuse. This series includes variants with different output configurations, such as single transistors or Darlington pairs. The product line is designed for general-purpose isolation tasks. Related parts in the family may offer dual channels or linear response options, but the LDA111S specifically targets high-gain switching applications with its Darlington architecture.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-referencing should be performed carefully as direct replacements may differ in pinout or electrical specifications. Verify compatibility with existing circuit designs before substituting.