EL817(A)-V

Overview

The EL817(A)-V is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with an NPN phototransistor detector in a compact DIP-4 package. The device provides high isolation voltage of 5000 Vrms between input and output circuits. Key electrical parameters include a minimum current transfer ratio (CTR) of 50% at IF=5mA and VCE=5V, a maximum collector-emitter breakdown voltage of 35V, and a maximum forward current of 60mA. It operates within a temperature range of -55°C to +110°C and complies with RoHS standards.

Feature Summary

• High isolation voltage capability between input and output sides
• Compact dual-in-line package design for space-constrained applications
• Compliant with international safety approvals including UL and VDE

Applications

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

Procurement Notes

Verify the specific suffix 'A' corresponds to the required CTR binning, as variations exist within the EL817 series. Confirm package type matches design requirements, as SMD variants also exist. Ensure compliance with local environmental regulations regarding lead-free components. Cross-reference datasheet revisions for any updates to mechanical dimensions or approval numbers before finalizing procurement specifications.

Selection Notes

Select this component when a standard NPN phototransistor output is required for DC signal isolation. The 50% minimum CTR ensures reliable switching for logic-level interfaces. Consider thermal management if operating near the upper temperature limit. Verify that the 35V collector-emitter voltage rating exceeds the load voltage in the target circuit application.

Part Context

This part belongs to the EL817 series of photocouplers from Everlight Electronics. The series offers various packaging options including through-hole DIP and surface-mount SMD configurations. Different letter suffixes typically denote specific Current Transfer Ratio (CTR) bins or packaging types. The EL817 family is widely used for general-purpose isolation tasks due to its balance of performance and cost-effectiveness.

Replacement Considerations

Direct substitutes may include other EL817 variants with matching CTR bins, such as EL817(B) or EL817(C), provided the isolation and package compatibility are verified. Generic equivalents from other manufacturers offering similar DIP-4 transistor output optocouplers with 5000V isolation may also be considered after thorough parameter comparison.