IS121B

Transistor, Photovoltaic Output Optoisolators Overview

The IS121B is a single-channel optocoupler featuring an infrared LED coupled to an NPN silicon phototransistor. It utilizes a Mini-Flat surface-mount package with four gull-wing pins, designed for space-constrained applications. The device provides a high isolation voltage of 3750Vrms between input and output circuits. It supports a collector current of up to 50 mA and offers a current transfer ratio of 130%. The component is available in tape and reel packaging, facilitating automated assembly processes.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an infrared emitter with an NPN silicon phototransistor for signal isolation
• Provides robust electrical isolation via a 3750Vrms dielectric barrier
• Utilizes a compact Mini-Flat SMD package for efficient board space utilization

Transistor, Photovoltaic Output Optoisolators Applications

• General-purpose signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic gates
• Power supply feedback loops requiring galvanic separation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix designation against official Isocom Components documentation to ensure correct pinout and performance characteristics. Confirm that the required packaging format matches the intended manufacturing process, as availability may vary between bulk and tape-and-reel options depending on production runs.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a low-profile surface-mount solution is required for single-channel isolation. Ensure the circuit design accommodates the 50 mA maximum collector current limit. Verify that the 3750Vrms isolation rating meets the safety requirements of the target application environment.

Transistor, Photovoltaic Output Optoisolators Part Context

The IS121B belongs to the IS121 series of optocouplers manufactured by Isocom Components 2004 LTD. This series includes variants such as the IS121A, IS121C, and IS121D, which share similar structural designs but may differ in specific electrical parameters or packaging configurations. The brand specializes in infrared optoelectronic devices offering alternatives to standard industry components.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Cross-reference with other single-channel transistor-output optocouplers in Mini-Flat packages if direct substitution is needed. Verify compatibility regarding isolation voltage ratings and physical footprint dimensions before integrating alternative parts into existing designs.