IS281GR

Overview

The IS281GR is a single-channel optoisolator manufactured by Isocom Components 2004 LTD, featuring a DC input and NPN phototransistor output. It provides an isolation voltage of 3750Vrms and supports a maximum collector-emitter voltage of 80V with a continuous output current of 50mA. The device operates within a temperature range of -55°C to 110°C and utilizes a 4-pin SOP surface-mount package. Key electrical characteristics include a typical forward voltage of 1.2V, a maximum DC forward current of 60mA, and a saturation voltage of 200mV. The current transfer ratio ranges from 50% to 600% at a forward current of 10mA, with typical rise and fall times of 5µs and 3µs respectively.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits using optical transmission technology.
• Features a robust NPN phototransistor output stage capable of handling significant load currents.
• Designed for reliable operation across extended industrial temperature ranges.

Applications

• General-purpose signal isolation in digital communication interfaces
• Power supply feedback loops for voltage regulation
• Microcontroller interface circuits requiring galvanic separation

Procurement Notes

Verify the specific suffix GR against official manufacturer documentation to confirm pinout compatibility and packaging specifications. Ensure that the procurement source provides valid traceability data and confirms RoHS compliance status as stated in public records. Cross-reference the part number with the latest datasheet revisions to avoid discrepancies in electrical parameters or mechanical dimensions during integration.

Selection Notes

Select this component when a single-channel transistor output isolator is required for moderate-speed switching applications. Consider the 3750Vrms isolation rating for safety-critical designs. Evaluate the 50mA output current capability against load requirements. The wide operating temperature range makes it suitable for harsh environments where standard commercial-grade components may fail.

Part Context

This component belongs to the family of single-channel optocouplers designed for general-purpose isolation tasks. It serves as a bridge between low-voltage control logic and higher-voltage power stages. The SOP-4 package allows for compact PCB layout in space-constrained designs. It is commonly used in systems requiring protection against ground loops and transient voltage spikes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided reference material. Verify pin-to-pin compatibility and electrical parameter equivalence before substituting with other manufacturers' offerings. Consult official cross-reference guides for validated alternatives.