ISP521-4

Transistor, Photovoltaic Output Optoisolators Overview

The ISP521-4 is a quad-channel optically coupled isolator manufactured by Isocom Components. It integrates four infrared light-emitting diodes with four NPN silicon phototransistors within a single space-efficient dual in-line plastic package. The device provides electrical isolation between input and output circuits, featuring a high isolation voltage of 5300 Vrms and a peak value of 7500 Vpk. Key electrical parameters include a minimum collector-emitter breakdown voltage (BVCEO) of 55V and a minimum current transfer ratio of 50%. The component operates within a temperature range of -30°C to 100°C and undergoes 100% electrical parameter testing.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates four independent channels for high-density mounting applications
• Provides robust electrical isolation via infrared LED and NPN phototransistor architecture
• Features high isolation voltage ratings suitable for demanding industrial environments
• Ensures signal integrity through 100% tested electrical parameters

Transistor, Photovoltaic Output Optoisolators Applications

• Computer terminals and peripheral interfaces
• Industrial system controllers and programmable logic controllers
• Measuring instruments and data acquisition systems
• Signal transmission between systems with different potentials and impedances

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix requirements when ordering, as options such as 'G' for 10mm lead spread or 'SM' for surface mount variants exist within the TLP521 series family. Confirm that the ISP521-4 designation aligns with the required channel count and package type for your design. Ensure compliance with RoHS standards and UL recognition if applicable to your project specifications before finalizing procurement.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select the ISP521-4 when multiple isolated channels are required in a compact footprint, eliminating the need for discrete components. Consider its high current transfer ratio and breakdown voltage for reliable switching in noisy environments. Evaluate the DIP package constraints against board space limitations. Compare performance metrics against single-channel alternatives to determine cost-effectiveness for multi-circuit isolation needs.

Transistor, Photovoltaic Output Optoisolators Part Context

The ISP521-4 belongs to the broader TLP521 series of optocouplers produced by Isocom Components. This series is designed as a replacement for industry-standard components, offering comparable pinouts and electrical characteristics. The manufacturer specializes in providing alternatives for discontinued parts and custom electrical selections. The product line emphasizes high reliability and adherence to global safety standards for commercial and industrial applications.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers include TLP521-4 from Toshiba Semiconductor. Verify pin compatibility and electrical specifications before substitution. Ensure the alternative meets the same isolation voltage and current transfer ratio requirements.