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EL817S1(D)(TD)-FG
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 4-SMD
- Series：EL817
- Mfr：Everlight Electronics Co Ltd
- Package：Tape & Reel (TR)
- Number of Channels：1
- Voltage - Isolation：5000Vrms
- Current Transfer Ratio (Min)：300% @ 5mA
- Current Transfer Ratio (Max)：600% @ 5mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：6µs, 8µs
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：80V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.2V
- Current - DC Forward (If) (Max)：60 mA
- Vce Saturation (Max)：200mV
- Operating Temperature：-55°C ~ 110°C
- Mounting Type：Surface Mount
- Package / Case：4-SMD, Gull Wing
- Supplier Device Package：4-SMD
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Overview
The EL817S1(D)(TD)-FG is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with a phototransistor detector in a surface-mount SOP-4 package with a 2.54mm lead pitch. The device provides high isolation voltage of 5000Vrms between input and output circuits. Key electrical parameters include a collector-emitter breakdown voltage of 35V, forward current of 60mA, and output current of 50mA. The current transfer ratio ranges from 50% to 600% at IF=5mA and VCE=5V. It operates within a temperature range of -55°C to +110°C.
Feature Summary
- High isolation voltage capability for safe signal transmission across potential barriers
- Compact surface-mount packaging suitable for automated PCB assembly
- Wide operating temperature range ensuring reliability in harsh environments
Applications
- Signal isolation in industrial control systems
- Switching power supply feedback loops
- Microcontroller interface circuits requiring galvanic isolation
Procurement Notes
Verify the specific suffix (TD) against the manufacturer's latest datasheet to confirm tape-and-reel specifications and pin configuration. Ensure compatibility with standard SOP-4 footprints during design review. Cross-reference approval numbers such as UL and VDE if regulatory compliance is required for the final equipment.
Selection Notes
Select this component when a compact SMD solution is needed for basic digital isolation. Compare CTR ranges and switching speeds against application requirements. Consider thermal management capabilities given the small package size and total power dissipation limits specified in the datasheet.
Part Context
This part belongs to the EL817 series, a widely used family of photocouplers known for cost-effectiveness and reliability. The S1 variant denotes a specific surface-mount footprint optimized for space-constrained designs while maintaining standard pin spacing for easy retrofitting into existing DIP-based schematics.
Replacement Considerations
Direct substitutes include other EL817 series variants from Everlight or equivalent transistor-output optocouplers from manufacturers like Vishay or Sharp, provided pinouts and isolation ratings match.
