EL817(B)-VG

Overview

The EL817(B)-VG is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It features an infrared emitting diode optically coupled to an NPN phototransistor in a DIP-4 package. Key electrical specifications include a maximum collector-emitter voltage of 35 V, a maximum forward current of 60 mA, and a typical current transfer ratio of 130% at 5 mA input. The device provides high isolation with a rated insulation voltage of 5000 Vrms. Operating temperatures range from -55 °C to +110 °C, with a power dissipation rating of 200 mW.

Feature Summary

• High isolation voltage capability between input and output circuits
• RoHS compliant and halogen-free construction
• Wide operating temperature range suitable for industrial environments
• Compact dual-in-line package design

Applications

• Signal transmission between circuits of different potentials
• System appliances and measuring instruments
• Telecommunication equipment interfaces
• Programmable controller inputs

Procurement Notes

Verify the specific suffix VG against the manufacturer's latest datasheet to confirm compliance with regional environmental directives. Ensure the ordering code matches the required lead bend or spacing variant if surface mount or wide-lead options are needed. Cross-reference the CTR binning requirements with system design margins before finalizing procurement.

Selection Notes

Select this component when high isolation voltage is required for DC signal transmission. The NPN phototransistor output suits applications needing standard switching characteristics. Verify that the 50 mA collector current limit meets load requirements. Consider the thermal derating curve if operating near the upper temperature limit.

Part Context

This part belongs to the EL817 series of photocouplers, which are widely used for general-purpose isolation. The series includes various packaging options such as SMD and wide-lead variants. The EL817 family is recognized for its reliability in industrial control and consumer electronics applications requiring galvanic isolation.

Replacement Considerations

Direct substitutes may include other EL817 variants from Everlight or equivalent transistor-output optocouplers from other manufacturers. Verify pinout compatibility and isolation voltage ratings. Check current transfer ratio ranges to ensure functional equivalence in the target circuit.