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Product Detailed Parameters
- Description：OPTOISOLTR 5.3KV 1CH TRANS 4-DIP
- Series：SFH618A-4
- Mfr：Isocom Components 2004 LTD
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：5300Vrms
- Current Transfer Ratio (Min)：160% @ 1mA
- Current Transfer Ratio (Max)：320% @ 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-4G is a single-channel transistor output optocoupler featuring an infrared LED and NPN silicon phototransistor in a 4-pin DIP package. It offers high isolation voltage of 5.3kVrms and 7.5kV peak. The device supports low input current of 0.5mA with high current transfer ratios ranging from 63% to 320% at 1mA, and minimum 32% at 0.5mA. It provides a minimum collector-emitter breakdown voltage (BVCEO) of 55V. All electrical parameters are 100% tested.
Feature Summary
- Low input current requirement for efficient drive
- High current transfer ratio across operating range
- High isolation voltage capability for safety
- Space-efficient dual in-line plastic packaging
Applications
- Computer terminals
- Industrial systems controllers
- Measuring instruments
- Signal transmission between systems of different potentials and impedances
Procurement Notes
Verify the specific ordering suffix 'G' corresponds to the 10mm lead spread variant as documented in official specifications. Confirm that the component meets UL recognized file number E91231 requirements if isolation certification is necessary for the end application. Ensure compatibility with standard DIP mounting processes.
Selection Notes
Select this component when low input current operation is required alongside high isolation voltage. The high current transfer ratio makes it suitable for applications needing reliable signal transmission at low drive levels. Consider the 4-pin DIP form factor for through-hole assembly needs where space efficiency is balanced with robust mechanical connection.
Part Context
The SFH618A series consists of optically coupled isolators combining infrared LEDs with NPN silicon phototransistors. This series includes various package options such as surface mount and tape & reel variants. The SFH618A-4G specifically denotes the DIP version with extended lead spread, designed for general-purpose isolation tasks in industrial and computing environments.
Replacement Considerations
Direct substitutes within the SFH618A family include SFH618A-2-G and SFH618A-3-G, differing primarily in lead spread dimensions. Surface mount equivalents are available under the SFH618A-4SMT&R designation. Verify pinout and electrical characteristics match before substitution.
