EL3H7(TA)-VG

Overview

The EL3H7(TA)-VG is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It features an NPN phototransistor output with a collector-emitter voltage rating of 80V and a maximum collector current of 50mA. The device provides an isolation voltage of 3750 Vrms, ensuring robust electrical separation between input and output circuits. Key electrical parameters include a forward current (If) of 50mA and a forward voltage (Vf) of 1.4V. The current transfer ratio ranges from 50% to 600%. Switching characteristics are defined by rise and fall times of 18µs each. The component operates within a temperature range of -55°C to +110°C and has a power dissipation rating of 200mW.

Feature Summary

• Provides high-voltage isolation capability for signal transmission between isolated circuits
• Utilizes an NPN phototransistor output stage for digital switching applications
• Designed for surface-mount installation in compact electronic assemblies

Applications

• Industrial control systems requiring galvanic isolation
• Signal interfacing between microcontrollers and high-voltage loads
• Power supply feedback loops for circuit protection

Procurement Notes

Verify the specific suffix TA against the manufacturer's latest datasheet to confirm package type and tape-and-reel specifications. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the part number with official Everlight distributors to avoid obsolete or counterfeit components. Confirm that the requested quantity matches the standard packaging configuration available from authorized suppliers.

Selection Notes

Select this component when a single-channel optocoupler with moderate speed and high isolation voltage is required. The NPN output is suitable for sinking current in digital logic interfaces. Consider the 18µs switching time for application frequency limits. Verify that the 50mA collector current meets the load requirements of the downstream circuitry without exceeding thermal limits.

Part Context

This component belongs to the EL3H7 series of small-footprint phototransistor optocouplers. The series is designed for general-purpose isolation tasks where space constraints are significant. The TA suffix typically denotes a specific surface-mount package variant, distinguishing it from through-hole or alternative plastic package versions within the same functional family.

Replacement Considerations

Direct replacements must match the 3750 Vrms isolation rating and NPN output configuration. Verify pinout compatibility for SOIC-4 or SSOP-4 packages depending on the specific TA designation. Check that the replacement part supports the same operating temperature range and current transfer ratio specifications.