IS281E

Overview

The IS281E is a single-channel optoisolator manufactured by Isocom Components 2004 LTD, featuring a transistor output configuration. It provides an isolation voltage of 3750Vrms and operates within a temperature range of -55°C to 110°C. The device accepts a maximum DC forward current of 60 mA with a typical forward voltage of 1.2V. The collector-emitter breakdown voltage is rated at 80V, supporting a maximum output current of 50mA per channel. Current transfer ratio specifications vary between datasheets, ranging from a minimum of 50% to 100% at specified test currents. Typical rise and fall times are 5µs and 3µs respectively. It is housed in a 4-SOIC surface-mount package.

Feature Summary

• Provides high-voltage electrical isolation for signal transmission between circuits
• Utilizes a phototransistor output stage for digital switching applications
• Designed for surface-mount assembly in compact electronic layouts

Applications

• Industrial control systems requiring circuit isolation
• Power supply protection and monitoring circuits
• Smart metering and utility instrumentation

Procurement Notes

Verify the specific Current Transfer Ratio (CTR) requirements against available datasheet variants, as sources indicate differing minimum CTR values (50% vs 100%) for this part number. Confirm package dimensions match the 4-SOIC specification. Ensure compliance with RoHS3 standards if required by your manufacturing process. Cross-reference ordering suffixes with the manufacturer's official documentation to ensure correct component selection.

Selection Notes

Select this component when a single-channel transistor-output isolator is needed for moderate-speed digital signals. The 3750Vrms isolation rating suits general industrial and commercial applications. Consider the 5µs/3µs switching speeds for timing-sensitive designs. Verify that the 80V collector-emitter voltage meets the load requirements. Compare against other IS281 variants if higher CTR consistency or different packaging is required.

Part Context

The IS281E belongs to the IS281 family of optocouplers produced by Isocom Components 2004 LTD. This series includes various suffixes such as IS281A and IS281, which may differ in parameter tolerances or testing conditions while sharing the same fundamental transistor-output architecture and physical footprint. The brand specializes in infrared optoelectronic devices for isolation markets.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Users should consult the manufacturer's official substitution guide or equivalent generic transistor-output optocouplers with matching isolation voltage and package dimensions.