EL817(S1)(B)(TA)-G

Overview

The EL817(S1)(B)(TA)-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode and an NPN phototransistor within a compact surface-mount package. The device provides high isolation voltage of 5000 Vrms between input and output circuits. It features a current transfer ratio (CTR) ranging from 50% to 600% at a forward current of 5mA and collector-emitter voltage of 5V. The component supports a maximum operating temperature of 110°C and complies with RoHS standards.

Feature Summary

• High isolation voltage capability between input and output for enhanced safety
• Compact surface-mount design suitable for automated assembly processes
• Wide current transfer ratio range ensuring reliable signal transmission
• Compliance with international safety approvals including UL, VDE, and SEMKO

Applications

• Signal transmission between circuits of different potentials and impedances
• Programmable logic controllers and industrial automation systems
• Home appliances such as fan heaters and measuring instruments
• Telecommunication equipment interface isolation

Procurement Notes

Verify the specific suffix configuration against official Everlight documentation to ensure correct packaging and lead type specifications. Confirm RoHS compliance status and safety certification numbers required for your target market regulations. Check for end-of-life notices or alternative recommendations if the component is discontinued. Ensure the selected variant matches the required isolation voltage and CTR specifications for the application.

Selection Notes

Select this component when surface-mount technology is required for space-constrained designs. Ensure the circuit design accommodates the specified current transfer ratio variations across temperature ranges. Verify that the 5000 Vrms isolation rating meets the safety requirements of the application. Consider the thermal management capabilities given the 110°C maximum operating temperature limit.

Part Context

This part belongs to the EL817 series of photocouplers, which are widely used for electrical isolation in electronic circuits. The S1 designation indicates a specific surface-mount package variant with bent leads for mounting. The TA suffix typically denotes tape and reel packaging for automated placement. The B grade specifies the current transfer ratio binning category.

Replacement Considerations

Consult official Everlight documentation for confirmed substitute part numbers. Generic equivalents may not match the specific isolation voltage or CTR characteristics. Verify pin compatibility and package dimensions before substitution.