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Product Detailed Parameters
- Description：OPTOISOLTR 5.3KV 1CH TRANS 4-DIP
- Series：SFH618A-3
- Mfr：Isocom Components 2004 LTD
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：5300Vrms
- Current Transfer Ratio (Min)：100% @ 1mA
- Current Transfer Ratio (Max)：200% @ 1mA
- Turn On / Turn Off Time (Typ)：6µs, 5.5µs
- Rise / Fall Time (Typ)：3.5µs, 5µs
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：55V
- Current - Output / Channel：-
- Voltage - Forward (Vf) (Typ)：1.5V
- Current - DC Forward (If) (Max)：50 mA
- Vce Saturation (Max)：400mV
- Operating Temperature：-55°C ~ 100°C
- Mounting Type：Through Hole
- Package / Case：4-DIP (0.400", 10.16mm)
- Supplier Device Package：4-DIP
- Grade：-
- Qualification：-
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Overview
The SFH618A-3G is a single-channel optocoupler featuring an infrared LED and NPN silicon phototransistor in a DIP-4 package. It offers high isolation voltage of 5.3kV RMS and 7.5kV peak. The device supports low input current operation at 0.5mA with a minimum Current Transfer Ratio (CTR) of 32%. High collector-emitter breakdown voltage (BVCEO) is rated at 55V minimum. All electrical parameters are 100% tested.
Feature Summary
- Low input current requirement for efficient drive
- High current transfer ratio performance
- High isolation voltage capability
- High collector-emitter breakdown voltage
Applications
- Computer terminals
- Industrial systems controllers
- Measuring instruments
- Signal transmission between systems of different potentials and impedances
Procurement Notes
Verify the specific suffix 'G' indicates the 10mm lead spread option as documented in official Isocom Components datasheets. Confirm RoHS compliance status through the manufacturer's latest certification documents. Ensure the ordering part number matches the exact series designation to avoid confusion with surface mount or tape-and-reel variants within the same family.
Selection Notes
Select this component when low input current drive is required alongside high isolation requirements. The NPN phototransistor output suits applications needing standard switching capabilities. Verify that the 55V BVCEO meets the circuit's voltage stress requirements. Consider the DIP-4 package constraints for PCB layout and thermal management in the final design.
Part Context
This part belongs to the SFH618A series of low input current phototransistor optically coupled isolators manufactured by Isocom Components. The series utilizes infrared LEDs paired with NPN silicon phototransistors. The 'G' suffix specifically denotes the 10mm lead spread configuration, distinguishing it from standard or surface mount versions.
Replacement Considerations
Direct substitutes include other SFH618A series variants such as SFH618A-2X or SFH618A-4X, provided the lead spread and packaging format match the application requirements. Cross-brand replacements require matching CTR, isolation voltage, and package dimensions.
