ISP521-4SMT&R

Transistor, Photovoltaic Output Optoisolators Overview

The ISP521-4SMT&R is a surface-mount optically coupled isolator manufactured by Isocom Components. It integrates an infrared light emitting diode and an NPN silicon photo transistor within a space-efficient dual in line plastic package. The device provides electrical isolation between input and output circuits, featuring a high current transfer ratio of at least 50% and a robust isolation voltage rating of 5.3 kVrms with a peak withstand of 7.5 kV. The unit supports a maximum forward current of 50 mA and offers a minimum collector-emitter breakdown voltage of 55 V. All electrical parameters are 100% tested to ensure reliability.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an infrared LED and NPN silicon phototransistor for signal transmission across isolated domains
• Provides high-density mounting capability through a compact surface-mount dual in line plastic package
• Ensures circuit protection via high isolation voltage ratings and significant collector-emitter breakdown voltage

Transistor, Photovoltaic Output Optoisolators Applications

• Computer terminals requiring signal isolation
• Industrial system controllers and programmable logic controllers
• Measuring instruments needing impedance matching between systems
• Signal transmission interfaces between circuits of different potentials

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix SMT&R confirms the tape and reel packaging format required for automated assembly processes. Confirm that the ISP prefix aligns with the manufacturer's current nomenclature for the TLP521 series equivalent. Ensure the component meets the necessary environmental standards for the intended deployment environment before finalizing procurement orders.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high-density surface-mount technology is required for optical isolation applications. The device is suitable for designs demanding a minimum current transfer ratio of 50% and an isolation voltage of 5.3 kVrms. Consider this part for interfacing systems with differing potentials where compact form factors and verified electrical testing are critical design constraints.

Transistor, Photovoltaic Output Optoisolators Part Context

This component belongs to the TLP521 series family of optically coupled isolators produced by Isocom Components. The series typically includes variants such as single-channel, dual-channel, and quad-channel configurations. These devices are designed as direct replacements for standard industry phototransistor optocouplers, offering comparable performance metrics in a modernized surface-mount footprint suitable for contemporary electronic manufacturing.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

The ISP521-4SMT&R serves as a functional substitute for the Toshiba Semiconductor TLP521-4. Verify pinout compatibility and package dimensions during integration to ensure seamless replacement in existing printed circuit board layouts without requiring mechanical modifications.