ISP845X

Transistor, Photovoltaic Output Optoisolators Overview

The ISP845X is a high-density mounting photodarlington optically coupled isolator manufactured by Isocom Components. It features four independent channels within a single plastic dual in-line package, providing electrical isolation between input and output circuits. The device utilizes an infrared LED paired with NPN silicon photodarlington transistors to achieve signal transmission across isolated domains. Key specifications include a minimum current transfer ratio of 600%, ensuring high sensitivity for logic-level signals. The unit supports a maximum isolation voltage of 5.3 kVrms and withstands peak voltages up to 7.5 kVp. All electrical parameters are verified through 100% testing during production.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates four independent photodarlington channels for multi-signal isolation
• Provides high isolation voltage capability for safe potential separation
• Delivers high current transfer ratio for efficient signal coupling
• Utilizes surface mount or standard lead forms for flexible PCB integration

Transistor, Photovoltaic Output Optoisolators Applications

• Computer terminal interface isolation
• Industrial system controller signal protection
• Measuring instrument circuit isolation
• Signal transmission between systems with different potentials

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix designation (e.g., SM for surface mount, G for 10mm lead spread) against the required mechanical footprint. Confirm that the photodarlington output type aligns with the target circuit's switching speed requirements, as darlington pairs typically exhibit slower response times compared to standard phototransistors. Ensure the operating temperature range meets the environmental conditions of the final assembly.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when multiple isolated channels are required within a compact form factor. The high current transfer ratio makes it suitable for driving logic inputs directly without additional amplification. Consider the trade-off between the high gain of the photodarlington output and its switching speed limitations compared to faster optocoupler variants. Verify compliance with UL and VDE standards if safety certification is mandatory for the end application.

Transistor, Photovoltaic Output Optoisolators Part Context

The ISP845X belongs to the ISP815/ISP825/ISP845 series of high-density mounting photodarlington optically coupled isolators from Isocom Components. This series is designed to replace traditional relay-based isolation methods in space-constrained designs. The 'X' suffix typically denotes specific approval configurations, such as UL recognition and VDE approval, ensuring regulatory compliance for international markets.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct replacements must match the four-channel configuration and photodarlington output type. Generic quad-channel phototransistor optocouplers may not provide sufficient current transfer ratio without external circuit adjustments. Verify pinout compatibility and isolation voltage ratings before substitution.