EL816(B)

Overview

The EL816(B) is a single-channel transistor output optocoupler manufactured by Everlight Electronics Co Ltd. It consists of an infrared emitting diode optically coupled to an NPN phototransistor detector. The device provides high isolation voltage between input and output terminals, rated at 5000 Vrms. It supports a collector-emitter breakdown voltage of 80 V minimum and a maximum forward current of 50 mA. The component operates within a temperature range of -55°C to +110°C and features a current transfer ratio ranging from 50% to 600% under standard test conditions.

Feature Summary

• High isolation voltage capability between input and output circuits
• Compact small outline package design for space-constrained applications
• Wide operating temperature range suitable for industrial environments
• Compliant with RoHS standards and lead-free manufacturing processes

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 (B) against the manufacturer's latest datasheet to confirm pinout configuration and electrical tolerances. Ensure compliance with regional regulatory requirements such as UL or VDE approvals if required for the end application. Confirm package type availability, as the series offers both DIP and SMD options. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when galvanic isolation is required between low-voltage control circuits and higher-voltage loads. The NPN phototransistor output is suitable for digital signal switching applications. Consider the current transfer ratio variations when designing bias networks for reliable switching. Ensure the operating temperature range aligns with the environmental conditions of the target system.

Part Context

The EL816 series represents a family of photo couplers featuring infrared emitters coupled to phototransistors. These devices are widely used for electrical isolation in electronic circuits. The series is available in various package configurations, including 4-pin DIP and surface-mount options. The EL816(B) variant specifically denotes a particular binning or configuration within this established product line.

Replacement Considerations

Compatible substitutes include other generic 4-pin transistor output optocouplers with similar isolation ratings and pinouts. Verify that replacement parts match the current transfer ratio and isolation voltage specifications. Check for equivalent approval certifications if safety compliance is mandatory.