EL3H7(I)(EB)-G

Overview

The EL3H7(I)(EB)-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It features an NPN phototransistor output and provides a high isolation voltage of 3750 Vrms. The device operates within a temperature range of -55°C to +110°C. Key electrical parameters include a current transfer ratio (CTR) of 100-200% at a forward current of 5mA, a maximum collector-emitter saturation voltage of 200mV, and a typical rise/fall time of 5µs/3µs. It is housed in a compact 4-SSOP package with a width of 4.40mm.

Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and NPN phototransistor technology.
• Offers high insulation voltage capability for safe signal transmission across potential differences.
• Designed for surface-mount assembly in a small form factor package suitable for dense PCB layouts.

Applications

• Industrial control systems requiring isolated signal interfacing
• Consumer electronics with microcontroller isolation needs
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific suffix I(EB) against official Everlight documentation to confirm the exact Current Transfer Ratio binning and packaging configuration. Ensure compatibility with existing footprint designs, as package dimensions must match the target PCB layout. Confirm RoHS compliance status through the manufacturer's latest environmental declaration before finalizing procurement specifications.

Selection Notes

Select this component when a standard CTR range of 100-200% meets the circuit requirements. Consider the 4-SSOP package constraints regarding thermal dissipation and soldering profiles. Evaluate the operating temperature range against the intended environment to ensure reliability under extreme conditions. Compare performance metrics with alternative optocouplers if higher speed or different isolation ratings are required.

Part Context

This part belongs to the EL3H7 series of transistor output optocouplers from Everlight. The series is characterized by its compact size and reliable performance in general-purpose isolation applications. Variations in the suffix typically denote differences in CTR bins, packaging types, or environmental certifications, allowing designers to tailor components to specific manufacturing and operational needs without changing the core electrical architecture.

Replacement Considerations

Direct substitutes may include other EL3H7 variants with compatible pinouts and electrical characteristics. Verify that any replacement maintains the same 3750 Vrms isolation rating and 4-SSOP package dimensions. Cross-reference datasheets to ensure equivalent CTR ranges and switching times to prevent circuit performance degradation.