IS3H4

Overview

The IS3H4 is a photovoltaic optocoupler manufactured by Isocom Components 2004 Ltd. It features an NPN silicon photo transistor output and dual infrared LEDs in inverse parallel for AC input compatibility. The device provides 3.75 kV isolation voltage and supports a collector-emitter voltage of 80 V. Packaged in a compact 4-pin SOP, it offers high reliability for signal isolation applications.

Feature Summary

• Dual infrared LED configuration enables direct AC input operation without external rectification
• High isolation voltage rating ensures robust electrical separation between input and output circuits
• NPN silicon photo transistor output provides reliable switching performance

Applications

• AC signal detection and isolation
• Industrial control systems requiring galvanic isolation
• Power supply feedback loops

Procurement Notes

Verify the specific datasheet revision (e.g., DE93326) to confirm pinout and electrical characteristics match your design requirements. Ensure compliance with SVHC declarations as stated in current documentation. Cross-reference manufacturer part numbers to avoid confusion with similar series components.

Selection Notes

Select this component when AC input isolation is required without additional rectifier circuitry. The 80 V collector-emitter voltage rating suits moderate voltage switching applications. Verify package compatibility with PCB layout constraints due to the half-pitch SOP form factor.

Part Context

Isocom Components 2004 Ltd specializes in infrared optoelectronic devices with over 40 years of industry expertise. The company traces its origins to Litronix and Siemens heritage, focusing on reliable optocouplers for commercial and industrial markets. Production involves facilities in Malaysia and final testing in the UK.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.