ISQ203

Transistor, Photovoltaic Output Optoisolators Overview

The ISQ203 is a single-channel, high-density phototransistor optically coupled isolator manufactured by Isocom Components. It integrates an infrared light-emitting diode with an NPN silicon phototransistor in a space-efficient dual-in-line plastic package. The device provides a minimum collector-emitter breakdown voltage of 70V and supports a maximum forward current of 50mA. It features a nominal current transfer ratio of 225% and a maximum dark power of 50nA. The unit offers a high isolation voltage of 5300Vrms (7500V peak) and operates within standard industrial temperature ranges.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High isolation voltage capability for safe signal transmission between systems of different potentials
• High density packaging design suitable for space-constrained applications
• NPN silicon phototransistor output for reliable digital switching

Transistor, Photovoltaic Output Optoisolators Applications

• Computer terminals
• Industrial systems controllers
• Signal transmission between systems of different potentials and impedances

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix configuration required for your assembly process, as the base part number allows for variations including surface mount (SM) or tape and reel (SMT&R) options. Confirm that the lead spread matches your PCB footprint requirements, noting that a 10mm lead spread option exists if designated by adding 'G' to the part number. Ensure compliance with RoHS standards and check for UL recognition status during final component qualification.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high isolation voltage and compact form factor are critical for circuit design. The NPN phototransistor output is suitable for general-purpose digital isolation tasks. Consider the available packaging variants, such as surface mount or through-hole configurations, based on manufacturing constraints. Verify that the 70V minimum breakdown voltage meets the load requirements of the isolated side of the circuit.

Transistor, Photovoltaic Output Optoisolators Part Context

The ISQ203 belongs to the IS20*, ISD20*, and ISQ20* series of optically coupled isolators from Isocom Components. This family utilizes infrared LEDs paired with NPN silicon phototransistors. The series is designed to provide robust electrical isolation in a small footprint, serving as a direct replacement or alternative for various industry-standard transistor-output optocouplers used in control and communication interfaces.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers include ILQ2SM, ILQ2SMT&R, ILQ2XSM, and ILQ2XSMT&R from Isocom Components.