IS4N46

Overview

The IS4N46 is a single-channel optoisolator manufactured by Isocom Components 2004 LTD. It features a Darlington transistor output with an accessible base terminal, housed in a 6-DIP package. The device provides an isolation voltage of 5300Vrms and operates within a temperature range of -40°C to 85°C. Key electrical parameters include a maximum forward current of 20 mA, a typical forward voltage of 1.4 V, and a collector-emitter saturation voltage of 20 V. The unit supports through-hole mounting and is designed for DC input applications.

Feature Summary

• Integrates a Darlington output configuration with a dedicated base pin for enhanced control flexibility
• Provides high-voltage electrical isolation between input and output circuits
• Designed for low input current operation to reduce power consumption
• Supports wide operating temperature ranges suitable for industrial environments

Applications

• General-purpose signal isolation in digital communication interfaces
• Switching applications requiring high current gain from low input signals
• Industrial control systems needing robust galvanic isolation
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific manufacturer designation when sourcing, as Isocom Components 2004 LTD produces this part distinct from Broadcom's 4N46 series. Confirm the 5300Vrms isolation rating aligns with system safety requirements. Ensure the 6-DIP package dimensions match the target PCB footprint. Check RoHS compliance status against project specifications, as older variants may differ. Validate lead times due to potential availability constraints for specialized optocouplers.

Selection Notes

Select the IS4N46 when a Darlington output with base access is required for precise switching control. The 5300Vrms isolation rating exceeds standard 3750Vrms options, offering higher safety margins. Consider the -40°C to 85°C operating range for harsh environment deployment. Compare the low input current requirement against available drive voltages to ensure proper activation without excessive power draw from the source circuit.

Part Context

Isocom Components 2004 LTD specializes in photonic isolation devices, maintaining a legacy dating back to Litronix and Siemens engineering teams. The company focuses on both commercial plastic and military-grade ceramic optocouplers. The IS4N46 represents their standard plastic DIP line, targeting cost-sensitive industrial applications while maintaining high reliability standards established over decades of manufacturing experience in the UK and Malaysia.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.