EL3H4(TA)-VG

Overview

The EL3H4(TA)-VG is a single-channel phototransistor output optocoupler manufactured by Everlight Electronics. It features an infrared emitting diode reverse-parallel connected to a second one, coupled to a phototransistor in a green compound package. The device provides 3750 Vrms isolation voltage and supports a maximum forward current of 50 mA with a forward voltage of 1.2 V typical. It operates within a temperature range of -55°C to 100°C and has a power dissipation rating of 200 mW. Rise and fall times are specified at 6 µs and 8 µs respectively, with a maximum collector-emitter voltage of 80 V.

Feature Summary

• Dual infrared LED input configuration for AC/DC compatibility
• High isolation voltage capability of 3750 Vrms
• Wide operating temperature range from -55°C to 100°C
• Surface mount SSOP-4 packaging

Applications

• Signal isolation in industrial control systems
• Power supply feedback loops
• Microcontroller interface circuits

Procurement Notes

Verify the specific suffix (TA) against the manufacturer's latest datasheet to confirm tape-and-reel packaging requirements. Ensure the component matches the required isolation voltage and CTR specifications for the target application. Cross-reference the part number with official Everlight documentation to avoid confusion with similar variants like EL3H4(A)(TA)-VG or EL3H4(B)(TA)-VG which may have different electrical characteristics.

Selection Notes

Select this component when high isolation voltage and dual-LED input for AC operation are required in a compact surface-mount package. Consider the 3750 Vrms isolation rating and the -55°C to 100°C operating range for harsh environments. Verify that the phototransistor output type and 80 V collector-emitter voltage meet the circuit requirements. Compare rise/fall times if speed is critical.

Part Context

The EL3H4 series from Everlight includes various configurations with different input/output combinations and packaging options. The TA suffix typically denotes tape-and-reel packaging. This specific model is part of a broader family of optocouplers designed for general-purpose isolation applications, offering reliability and compliance with international safety standards.

Replacement Considerations

Check for direct substitutes such as EL3H4(A)(TA)-VG or EL3H4(B)(TA)-VG, ensuring pinout and electrical parameters match. Verify equivalent isolation ratings and CTR ranges before substitution.