EL817(B)-G

Overview

The EL817(B)-G 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 4-pin DIP package. The device provides high isolation voltage of 5000 Vrms between input and output circuits. Key electrical parameters include a maximum collector-emitter voltage of 35 V, a maximum forward current of 60 mA, and a power dissipation of 200 mW. The current transfer ratio ranges from 50% to 600% at a forward current of 5 mA. Operating temperatures span from -55 °C to +110 °C.

Feature Summary

• High isolation voltage capability between input and output circuits
• Compact dual-in-line package design for through-hole mounting
• Compliant with RoHS standards and halogen-free construction
• Recognized by UL, VDE, SEMKO, NEMKO, DEMKO, FIMKO, CSA, and BSI

Applications

• Programmable controllers
• System appliances and measuring instruments
• Telecommunication equipment
• Home appliances such as fan heaters
• Signal transmission between circuits of different potentials and impedances

Procurement Notes

Verify the specific suffix designation against the manufacturer's latest documentation to ensure compliance with required safety approvals and packaging configurations. Confirm that the component meets the necessary regional regulatory standards for the intended deployment environment before finalizing procurement orders.

Selection Notes

Select this component when high isolation voltage and compact form factor are required for DC signal transmission. Ensure the application circuit accommodates the specified current transfer ratio range and operating temperature limits. Verify pin compatibility with existing PCB layouts designed for standard 4-pin DIP packages.

Part Context

This part belongs to the EL817-G series of photocouplers produced by Everlight Electronics. The series utilizes a 4-pin DIP configuration and integrates an infrared LED with an NPN phototransistor. The product line is designed for general-purpose isolation applications requiring robust electrical separation and reliable signal transmission across varying potential differences.

Replacement Considerations

Direct substitutes within the same family include EL817 and EL817M variants. Alternative surface-mount options exist within the EL817S1 series. Verify pinout compatibility and isolation voltage ratings when considering cross-references.