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EL817-G
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 4-DIP
- Series：-
- Mfr：Everlight Electronics Co Ltd
- Package：Tube
- 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)：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：Through Hole
- Package / Case：4-DIP (0.300", 7.62mm)
- Supplier Device Package：4-DIP
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Overview
The EL817-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It comprises an infrared emitting diode optically coupled to a phototransistor detector in a RoHS-compliant DIP-4 package. Key electrical parameters include a maximum isolation voltage of 5000 Vrms, a collector-emitter breakdown voltage of 35 V, and a typical forward voltage of 1.2 V. The device supports a DC forward current of up to 60 mA and offers a current transfer ratio ranging from 50% to 600%. It operates within a temperature range of -55 °C to +110 °C.
Feature Summary
- High isolation voltage between input and output for enhanced safety
- Compact dual-in-line package design suitable for space-constrained applications
- Wide operating temperature range supporting demanding environments
- RoHS compliant and lead-free construction
Applications
- Industrial control systems requiring signal isolation
- Power supply feedback loops
- Communication equipment interface circuits
- Microcontroller input/output isolation
Procurement Notes
Verify the specific CTR bin (e.g., B, C, or D) required for your application, as performance varies significantly across the 50%-600% range. Confirm that the standard DIP-4 package meets your PCB layout requirements compared to surface-mount alternatives like the SMD variants. Ensure compliance with UL and VDE recognition standards if used in certified end-products.
Selection Notes
Select this component when high isolation voltage and robust transistor output are needed. Consider the wide CTR variation; if precise gain is critical, specify the appropriate suffix code. Compare against SMD versions if board space is limited. Verify thermal dissipation capabilities, as the max power dissipation is rated at 200mW.
Part Context
The EL817 series is a widely recognized family of photocouplers featuring an infrared LED and phototransistor. The EL817-G specifically denotes the standard DIP-4 package variant. This series is commonly used as a general-purpose isolator in various electronic circuits where galvanic isolation is necessary between low-voltage control signals and higher-voltage loads.
Replacement Considerations
Direct pin-compatible replacements may include other EL817 variants such as EL817(S)(D)-V for surface mount applications. Cross-brand equivalents exist but require verification of isolation voltage, CTR ranges, and package dimensions to ensure functional compatibility.
