ISP321-4BLG

Transistor, Photovoltaic Output Optoisolators Overview

The ISP321-4BLG is a surface-mount optically coupled isolator manufactured by Isocom Components. It integrates an infrared emitting diode with an NPN silicon phototransistor in a compact SMD package. The device provides high isolation voltage of 5300 Vrms and a minimum collector-emitter breakdown voltage (BVCEO) of 70V. It features a typical rise time of 4µs and fall time of 3µs, with a maximum forward voltage of 1.4V. The unit supports a maximum input current of 50 mA and offers a current transfer ratio ranging from 200% to 600%. It is designed for signal transmission between systems with different potentials.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an infrared LED with an NPN phototransistor for single-channel isolation
• Provides high electrical isolation capability suitable for potential difference transmission
• Features fast switching characteristics with defined rise and fall times
• Constructed in a space-efficient surface-mount plastic package

Transistor, Photovoltaic Output Optoisolators Applications

• Computer terminal interfaces
• Industrial system controllers
• Signal transmission between circuits of different potentials and impedances

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'BLG' against official Isocom documentation to confirm exact pinout, lead finish, and tape-and-reel specifications. Ensure the component meets required isolation standards for the target application environment. Cross-reference datasheet parameters such as CTR and BVCEO with design requirements before finalizing procurement.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high-density mounting is required alongside robust galvanic isolation. The NPN output configuration suits standard logic interfacing. Consider the 70V BVCEO rating for applications involving higher load voltages. Verify thermal management needs based on the maximum forward current limits specified in the official datasheet.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the IS20* series of high-density phototransistor optocouplers from Isocom Components. The series utilizes infrared LEDs paired with NPN silicon phototransistors. Variants exist in DIP and surface-mount packages, offering options for different isolation voltages and packaging styles to suit various industrial and consumer electronics designs.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Compatible alternatives include other NPN output optocouplers with similar isolation ratings and package footprints. Verify pin compatibility and electrical parameters such as CTR and BVCEO before substitution. Generic equivalents may require schematic adjustments if interface thresholds differ significantly.