EL814S1(TB)-V

Overview

The EL814S1(TB)-V is a surface-mount AC-input phototransistor optocoupler manufactured by Everlight Electronics. It features two infrared-emitting diodes connected in inverse parallel, optically coupled to a single phototransistor detector. The device provides high isolation voltage of 5000 Vrms between input and output channels. It operates within a wide temperature range from -55°C to 110°C and supports a maximum collector-emitter voltage of 80V. The component is RoHS compliant and lead-free.

Feature Summary

• AC input response capability via dual inverse-parallel infrared LEDs
• High isolation voltage rating for safe signal transmission
• Wide operating temperature range suitable for harsh environments
• Compact surface-mount package design

Applications

• Solid-state relay driver circuits
• Microcontroller interface isolation
• Power supply feedback loops
• Industrial control system signal isolation

Procurement Notes

Verify the specific suffix (TB) indicates the correct surface-mount package configuration required for your PCB layout. Confirm that the AC-input characteristic aligns with your circuit design, as standard DC-input variants exist within the same series. Ensure compliance with RoHS and lead-free requirements if mandated by your manufacturing standards. Cross-reference the manufacturer's latest datasheet for any updates on approval statuses such as UL or VDE recognition.

Selection Notes

Select this component when AC signal detection without external rectification is required at the input stage. The dual-diode structure simplifies circuit design compared to using discrete components. Consider the surface-mount form factor for automated assembly processes. Evaluate the 5000 Vrms isolation rating against your safety clearance requirements. Ensure the phototransistor output current transfer ratio meets the load driving needs of your downstream logic or power stage.

Part Context

This part belongs to the EL814 series of optocouplers, which are designed for general-purpose isolation applications. The 'S1' designation typically denotes the specific pinout and packaging variant optimized for surface-mount technology. The series is widely used in industrial and consumer electronics where reliable electrical isolation is critical for noise immunity and safety compliance.

Replacement Considerations

Compatible substitutes include other AC-input phototransistor optocouplers with similar isolation ratings and package dimensions. Verify pin compatibility and current transfer ratio specifications before substitution. Alternative packages within the same family may require adapter solutions.