EL3H4(EB)-VG

Overview

The EL3H4(EB)-VG is a phototransistor output optocoupler manufactured by Everlight Electronics. It features an infrared emitting diode optically coupled to a phototransistor, housed in a compact 4-pin SSOP package. Key electrical parameters include a maximum collector-emitter voltage of 80V and a peak forward current of 50mA. The device provides high isolation with a rated isolation voltage of 3750 Vrms. It operates within a temperature range of -55°C to +100°C and has a power dissipation rating of 200mW.

Feature Summary

• Provides electrical isolation between input and output circuits using optical transmission
• Features a dual-directional input configuration allowing AC or DC signal driving
• Utilizes a compact surface-mount SSOP-4 package for space-constrained designs

Applications

• Signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic families
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific suffix (EB) against the manufacturer's latest datasheet to confirm pinout and electrical characteristics, as suffixes often denote packaging or specific performance variants. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability. Check for RoHS compliance status if required by your assembly standards. Confirm lead times and availability directly with suppliers, as stock levels fluctuate.

Selection Notes

Select this component when bidirectional input capability is required for AC line sensing or bridge rectifier inputs. Compare the CTR (Current Transfer Ratio) specifications against load requirements to ensure sufficient switching margin. Verify that the SSOP-4 footprint matches the PCB design constraints. Consider thermal management needs given the 200mW power dissipation limit in enclosed environments.

Part Context

This part belongs to the EL3H4 series of general-purpose optocouplers designed for reliable signal transfer across isolated barriers. The series is widely used in applications requiring galvanic isolation. The EB suffix typically indicates a specific tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

Direct replacements may include other EL3H4 variants with compatible pinouts and electrical ratings. Verify that substitute components maintain the same isolation voltage and package dimensions. Cross-reference CTR ranges to ensure functional equivalence in the target circuit.