IS281C

Overview

The IS281C is a single-channel optoisolator manufactured by Isocom Components 2004 LTD. It features a transistor output and provides an isolation voltage of 3750Vrms. The device operates with a DC input type and supports a maximum forward current (If) of 60 mA, with a typical forward voltage (Vf) of 1.2V. The output can withstand a maximum voltage of 80V and delivers up to 50mA per channel. Key electrical parameters include a minimum Current Transfer Ratio (CTR) of 50% at 10mA and a maximum CTR of 600% at 10mA. The saturation voltage (Vce) is limited to 200mV. Typical rise and fall times are 5µs and 3µs, respectively. It functions within a temperature range of -55°C to 110°C.

Feature Summary

• Provides high-voltage galvanic isolation between input and output circuits using a transistor-based optical coupling mechanism.
• Designed for surface-mount installation in compact four-pin SOIC packages to facilitate automated assembly processes.
• Capable of operating across extended industrial temperature ranges to ensure reliability in demanding environments.

Applications

• General-purpose signal isolation in industrial control systems
• Interface circuits for microcontrollers requiring electrical separation
• Power supply feedback loops for noise reduction

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm exact performance characteristics, as variations may exist within the product line. Ensure compliance with RoHS3 regulations and check moisture sensitivity levels prior to storage and handling. Confirm package dimensions match the target PCB footprint design requirements.

Selection Notes

Select this component when a single-channel transistor output isolator is required for moderate-speed applications. Consider the 3750Vrms isolation rating for safety-critical interfaces. Evaluate the 50-600% CTR range to ensure adequate signal transfer efficiency for the specific load conditions. Verify that the 80V output voltage rating exceeds the connected circuit's maximum potential.

Part Context

This component belongs to the family of optocouplers produced by Isocom Components 2004 LTD. These devices utilize light-emitting diodes and phototransistors to transmit signals across isolated barriers. The IS281C variant specifically targets applications needing robust electrical isolation with standard transistor output capabilities in a small form factor.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Cross-referencing requires consulting official manufacturer substitution guides or equivalent parameter matching from other vendors.

FAQ

What is the maximum isolation voltage for the IS281C?

The IS281C offers an isolation voltage of 3750Vrms.

Does the IS281C support AC input signals?

No, the datasheet specifies the input type as DC.

What is the typical rise time for this optocoupler?

The typical rise time is 5µs.