EL3H4(EA)-G

Overview

The EL3H4(EA)-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics Co Ltd. It features an NPN phototransistor output and provides a high isolation voltage of 3750 Vrms. The device is housed in a surface-mount 4-SSOP package with a width of 4.40mm. It operates within a temperature range of -55°C to +110°C. Key electrical parameters include a collector-emitter voltage of 80V and a maximum power dissipation of 200mW. The component is RoHS compliant and subject to moisture sensitivity classification.

Feature Summary

• Provides galvanic isolation between input and output circuits via an internal LED and phototransistor structure.
• Designed for surface-mount assembly using a compact 4-pin SSOP footprint.
• Capable of operating reliably across extended industrial temperature ranges.

Applications

• Signal isolation in microprocessor-based control systems
• Interface circuits for solid-state relays
• Noise immunity enhancement in data communication lines

Procurement Notes

Verify the specific suffix EA against the manufacturer's current datasheet to confirm pinout and packaging details, as suffixes often denote tape-and-reel configurations or specific compliance standards. Confirm availability status directly with authorized distributors, as this part number may be subject to discontinuation or limited supply constraints. Ensure the procurement source provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when a single-channel isolation barrier with moderate speed requirements is needed. The 4-SSOP package suits space-constrained printed circuit board designs. Verify that the required isolation voltage meets the system's safety standards. Consider the operating temperature range to ensure compatibility with the intended environmental conditions. Compare the current transfer ratio specifications if signal fidelity at low input currents is critical for the application design.

Part Context

This component belongs to the EL3H4 series of transistor output optocouplers from Everlight. The series is designed for general-purpose isolation applications. Variants within the series may differ in packaging or specific electrical tolerances. The EL3H4(EA)-G specifically denotes a version with defined moisture sensitivity and reel packaging characteristics suitable for automated assembly processes.

Replacement Considerations

Cross-reference with other single-channel NPN phototransistor optocouplers offering 3750 Vrms isolation and 4-pin surface mount packages. Verify pin compatibility and electrical parameter equivalence before substitution. Check for updated lifecycle status of potential replacement parts to ensure long-term availability.