ILD621

Transistor, Photovoltaic Output Optoisolators Overview

The ILD621 is a dual-channel phototransistor optocoupler manufactured by Vishay Semiconductor Opto Division. It utilizes GaAs infrared LED emitters paired with high-gain NPN silicon phototransistors to provide electrical isolation. The device features a standard DIP-8 package suitable for through-hole mounting. Key electrical parameters include an isolation voltage of 5300 Vrms, a maximum collector-emitter voltage of 70 V, and a peak forward current rating of 60 mA. The typical rise time is specified at 2.8 microseconds, while the fall time is 11 microseconds. The unit operates within a temperature range of -55°C to +100°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Multi-channel architecture utilizing GaAs IRLED emitters and high gain NPN silicon phototransistors
• Enhanced channel-to-channel Current Transfer Ratio (CTR) matching compared to single-channel variants
• Improved common mode rejection capabilities for signal integrity

Transistor, Photovoltaic Output Optoisolators Applications

• Digital signal isolation in microprocessor systems
• Isolation of control signals in power supply circuits
• Interface between logic circuits and high-voltage loads

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify that the specific order matches the dual-channel ILD621 variant rather than the quad-channel ILQ621 or their GB suffix equivalents. Confirm the package type corresponds to the standard DIP-8 configuration required for the application board layout. Ensure compliance with RoHS directives if environmental regulations apply to the manufacturing process.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when dual-channel isolation is required to reduce part count and improve CTR matching accuracy. The device is appropriate for applications demanding moderate speed performance with a 2.8 us rise time. Consider the 5300 Vrms isolation rating for safety-critical interfaces. Evaluate thermal management requirements given the operating temperature limits up to 100°C.

Transistor, Photovoltaic Output Optoisolators Part Context

The ILD621 belongs to the ILD/Q621 family of multi-channel phototransistor optocouplers. This series includes both dual (ILD/ILQ621) and quad (ILD/ILQ621GB) configurations. The family design focuses on reducing pin counts and enhancing consistency between channels. These devices are designed for general-purpose digital isolation tasks requiring reliable performance across wide temperature ranges.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes within the same family include the ILQ621 for quad-channel requirements. Cross-reference with other Vishay dual-channel optocouplers if pin compatibility differs. Verify that alternative components meet the 5300 Vrms isolation and 70 V collector-emitter voltage specifications.