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EL3H7-G
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Product Detailed Parameters
- Description：OPTOISO 3.75KV 1CH TRANS 4-SSOP
- Series：-
- Mfr：Everlight Electronics Co Ltd
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：3750Vrms
- Current Transfer Ratio (Min)：50% @ 5mA
- Current Transfer Ratio (Max)：600% @ 5mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：5µs, 3µs
- 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)：50 mA
- Vce Saturation (Max)：200mV
- Operating Temperature：-55°C ~ 110°C
- Mounting Type：Surface Mount
- Package / Case：4-SOIC (0.173", 4.40mm Width)
- Supplier Device Package：4-SSOP
- Grade：-
- Qualification：-
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Overview
The EL3H7-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It features an NPN phototransistor output and provides an isolation voltage of 3750 Vrms. The device operates within a temperature range of -55°C to +110°C. Current transfer ratios vary by suffix, with the base model offering 50-600 CTR. It is housed in a compact 4-pin SSOP package designed for surface mount applications.
Feature Summary
- Provides high electrical isolation between input and output circuits
- Utilizes an NPN phototransistor for signal transmission
- Designed for surface mount assembly in compact form factors
Applications
- Industrial control systems requiring galvanic isolation
- Signal transmission across isolated ground planes
- Microcontroller interface circuits for safety separation
Procurement Notes
Verify the specific current transfer ratio suffix required for the application, as performance varies significantly across variants such as EL3H7(A)-G or EL3H7(D)(EA)-G. Confirm package compatibility with PCB footprints, as the series includes both SSOP and SOIC options. Check manufacturer documentation for RoHS compliance status and moisture sensitivity levels before integration into production workflows.
Selection Notes
Select based on the required current transfer ratio and operating temperature range. Ensure the chosen variant matches the necessary isolation voltage specifications for the target circuit. Verify that the package type aligns with available surface mount assembly capabilities. Cross-reference datasheet parameters against system requirements to ensure adequate margin for switching speeds and power dissipation limits.
Part Context
This component belongs to the EL3H7-G series of ultra-small SSOP phototransistor optocouplers. The series is engineered for space-constrained designs while maintaining robust isolation characteristics. Variants within the family differ primarily in current transfer ratio ranges and specific packaging configurations, allowing designers to balance performance and size constraints effectively.
Replacement Considerations
Direct substitutes include other 4-pin SSOP transistor output optocouplers with comparable isolation voltages. Verify pinout compatibility and thermal characteristics when replacing. Consider variants like EL3H7(A)-G or EL3H7(D)(EA)-G if different current transfer ratios are acceptable within the design parameters.
