ISD204

Transistor, Photovoltaic Output Optoisolators Overview

The ISD204 is a phototransistor output optocoupler from Isocom Components, featuring an infrared LED and NPN silicon phototransistor in a dual-in-line plastic package. It offers high isolation voltage of 5.3 kVrms (7.5 kV peak) and a minimum collector-emitter breakdown voltage of 70 V. The device supports low input current operation at 0.5 mA with a minimum current transfer ratio of 50%. Available in variants including ISD204-1, -2, and -3, it provides options for surface mount or tape-and-reel packaging.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Optically coupled isolator combining an infrared LED with an NPN silicon phototransistor
• High isolation voltage capability for safe signal transmission between different potentials
• Low input current requirement enabling efficient drive conditions
• Space-efficient dual-in-line plastic package construction

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 variant required, such as -1, -2, or -3, which may indicate lead spread or package configuration differences. Confirm if surface mount (SM) or tape-and-reel (SMT&R) options are needed for production integration. Ensure compliance with RoHS standards and check for hermetic sealing requirements if applicable to the specific revision. Cross-reference datasheet revisions to confirm pinout and electrical characteristics match the design specifications.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select the ISD204 when low input current drive is necessary to reduce power consumption in control circuits. Choose this component for applications requiring robust galvanic isolation between digital logic levels and higher voltage domains. Consider the available package variations to align with automated assembly processes or manual soldering needs. Evaluate the current transfer ratio and breakdown voltage to ensure compatibility with the target load and isolation requirements.

Transistor, Photovoltaic Output Optoisolators Part Context

The ISD204 belongs to the IS204/ISD204/ISQ204 series of low input current phototransistor optically coupled isolators manufactured by Isocom Components. These devices are designed for general-purpose isolation tasks where compact size and reliable performance are critical. The series utilizes standard dual-in-line plastic packages, making them suitable for through-hole or surface mount implementations depending on the specific suffix selected.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers: SFH628A-4SMT&R.