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EL817(S1)(TD)
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 4-SMD
- Series：-
- Mfr：Everlight Electronics Co Ltd
- Package：Tape & Reel (TR)
- Number of Channels：1
- Voltage - Isolation：5000Vrms
- Current Transfer Ratio (Min)：50% @ 5mA
- Current Transfer Ratio (Max)：600% @ 5mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：4µs, 3µs
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：35V
- 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 EL817(S1)(TD) is a transistor output optocoupler manufactured by Everlight Electronics. It features a single channel with an infrared emitting diode input and a phototransistor output, housed in a 4-pin DIP or SMD package. The device provides electrical isolation between input and output circuits. Key electrical characteristics include a collector-emitter voltage of 35V, a collector current of 50mA, and a maximum forward current of 60mA. The isolation voltage rating is 5000Vrms. The component operates within a temperature range of -55°C to +110°C.
Feature Summary
- Provides galvanic isolation via optical coupling between input and output circuits
- Integrates an infrared LED with a silicon phototransistor detector
- Designed for signal transmission in compact electronic systems
Applications
- Industrial control systems for I/O isolation
- Power supply feedback loops
- Communication equipment signal interfacing
Procurement Notes
Verify the specific suffix codes (such as TD, TU, F, G) against the manufacturer datasheet to confirm exact packaging type, lead configuration, and compliance status. Ensure the selected variant matches the required PCB footprint and thermal specifications for the target application environment.
Selection Notes
Select this component when high-voltage isolation is required for low-speed digital signal transmission. Consider the CTR range and switching speed requirements relative to the circuit design. Verify that the package style aligns with the assembly process and board layout constraints.
Part Context
This part belongs to the EL817 family of optocouplers, widely used for general-purpose isolation. The S1 designation typically indicates specific mechanical or performance variations within the series. These devices are standard components for protecting sensitive control electronics from high-voltage transients in industrial and consumer applications.
Replacement Considerations
Check for direct pin-compatible substitutes such as the EL817S1(A)(TD) or EL817S1(B)(TD). Verify that alternative parts meet the same isolation voltage and current transfer ratio specifications before integration.
