ISP521-1XBL

Transistor, Photovoltaic Output Optoisolators Overview

The ISP521-1XBL is a single-channel phototransistor optocoupler manufactured by Isocom Components. It integrates an infrared emitting diode and an NPN silicon phototransistor within a compact surface-mount package designed for high-density mounting applications. The device provides electrical isolation between input and output circuits, ensuring signal transmission without direct electrical connection. Key specifications include a minimum collector-emitter breakdown voltage of 55 V and a maximum forward current rating of 0.05 A. The unit supports a wide operating temperature range from -30 °C to 100 °C and features a nominal current transfer ratio of 100%. It offers a maximum insulation voltage of 5300 V and maintains a maximum dark current of 100 nA.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an infrared LED with an NPN silicon phototransistor for reliable optical signal coupling
• Designed for high-density surface-mount assembly to optimize PCB space utilization
• Provides robust electrical isolation suitable for noise-sensitive circuit environments

Transistor, Photovoltaic Output Optoisolators Applications

• Logic-to-logic isolation in noisy industrial environments
• Line receiver circuits requiring signal integrity
• Programmable current level sensing applications
• Power supply digital programming interfaces

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'BL' against official manufacturer documentation to confirm lead frame configuration and tape-and-reel packaging details. Ensure compliance requirements such as UL recognition and RoHS status are confirmed for the specific production batch. Cross-reference the datasheet revision history to validate thermal characteristics and pinout assignments before finalizing procurement orders.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a single-channel transistor output isolator is required for surface-mount designs. Consider the 55 V collector-emitter breakdown voltage limit for low-voltage switching applications. Evaluate the 100% nominal current transfer ratio against drive current capabilities. Confirm that the -30 °C to 100 °C operating range meets the environmental constraints of the target system.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the ISP521 series of high-density mounting phototransistor optically coupled isolators. The series includes variants with different channel counts and lead forms, all sharing common architectural features. Isocom Components positions these devices as industry-standard replacements for discontinued or obsolete optocouplers, offering flexible parameter selection to meet specific circuit design needs.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Publicly documented substitutes include TLP521GB and ISP621-1. Verify pin compatibility and electrical ratings before substitution.