EL816S1(B)(TU)-F

Overview

The EL816S1(B)(TU)-F is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode optically coupled to a phototransistor detector in a compact SMD-4 package. The device provides high isolation voltage of 5000 Vrms between input and output circuits. Key electrical parameters include a collector-emitter breakdown voltage of 80V, maximum forward current of 50mA, and collector current of 50mA. The current transfer ratio ranges from 130% to 260%. It operates within a temperature range of -55°C to +110°C and features UL and VDE approvals for safety compliance.

Feature Summary

• High isolation voltage capability between input and output circuits
• Compact surface mount design suitable for space-constrained applications
• Wide operating temperature range for diverse environmental conditions
• Compliant with international safety standards including UL and VDE

Applications

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

Procurement Notes

Verify the specific suffix (B) corresponds to the required Current Transfer Ratio bin, as EL816 variants differ significantly in CTR specifications. Confirm the TU tape-and-reel packaging format matches assembly requirements. Ensure the supplier provides official datasheets confirming RoHS compliance and safety certifications such as UL and VDE recognition numbers. Cross-reference the manufacturer part number to avoid confusion with through-hole DIP versions or other CTR bins like C or D.

Selection Notes

Select this component when a surface-mount transistor output optocoupler with moderate speed and high isolation is required. The B suffix indicates a specific CTR bin; verify that the 130%-260% range meets circuit gain requirements compared to higher CTR options. Consider the 18us switching times for signal integrity needs. Ensure the SOP-4 footprint aligns with PCB layout constraints. Evaluate thermal management capabilities given the 110°C maximum junction temperature rating.

Part Context

This device belongs to the EL816 series of optocouplers, which are widely used for electrical isolation. The series offers various packages including DIP and SMD options. The S1 designation typically indicates a specific lead pitch or package variant within the broader EL816 family. These components serve as standard solutions for galvanic isolation in digital and analog signal transmission applications across consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other EL816S1 variants with matching CTR bins, such as EL816S1(C)(TU)-F or EL816S1(D)(TU)-F, provided their respective CTR ranges suit the design. Generic PC817 equivalents may be considered if pin compatibility and electrical ratings are verified. Always confirm package dimensions and isolation voltage ratings match before substitution.