ISQ204X-3SM

Transistor, Photovoltaic Output Optoisolators Overview

The ISQ204X-3SM is a high-density phototransistor optically coupled isolator manufactured by Isocom Components. It integrates an infrared light-emitting diode and an NPN silicon phototransistor within a surface-mount plastic package. The device provides four independent channels of signal isolation with a minimum current transfer ratio of 50%. It supports a maximum input forward current of 50 mA and offers a high breakdown voltage (BVCEO) of at least 70 V. The unit ensures robust electrical isolation with a rating of 5.3 kVRMS and 7.5 kV peak, suitable for demanding industrial environments.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates four independent channels of infrared LED and NPN phototransistor isolation in a single compact surface-mount package.
• Delivers high current transfer efficiency with a minimum ratio of 50% to ensure reliable signal transmission.
• Provides substantial electrical isolation capability rated at 5.3 kVRMS and 7.5 kV peak between input and output circuits.

Transistor, Photovoltaic Output Optoisolators Applications

• Computer terminal interfaces requiring isolated data transmission
• Industrial system controllers needing signal isolation between different potentials
• Signal transmission systems connecting components with differing impedances

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'X' against official Isocom documentation to confirm exact pinout and mechanical dimensions, as variations exist within the ISQ204 series. Ensure the surface-mount variant matches the required PCB footprint. Confirm that the 50% minimum CTR and 70V BVCEO meet the target circuit design specifications before finalizing procurement.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when multi-channel isolation is required in a space-constrained surface-mount application. The low input current requirement of 0.5mA aids in power-sensitive designs. Ensure the operating temperature range aligns with the system environment, as standard plastic packages may have lower thermal limits compared to hermetic ceramic alternatives.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the ISQ204 series of high-density phototransistor optically coupled isolators from Isocom Components. The series includes through-hole variants like ISQ204-1 and ISQ204-2, as well as other surface-mount options. These devices are designed for applications requiring multiple isolated channels within a small form factor.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes include other ISQ204 series variants such as ISQ204-3SM or ISQ204-3SMT&R if lead spacing differs. Cross-brand replacements require matching the 4-channel configuration, 5.3kV isolation rating, and NPN transistor output type.

Transistor, Photovoltaic Output Optoisolators FAQ

What is the minimum current transfer ratio for the ISQ204X-3SM?

The datasheet specifies a minimum current transfer ratio of 50%.

Does the ISQ204X-3SM support AC input signals?

No, the device consists of an infrared LED and NPN phototransistor, which typically requires DC drive for the LED input side.