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Product Detailed Parameters
- Description：OPTOISO 4.47KV 1CH TRANS 4-DIP
- Series：SFH617A
- Mfr：Isocom Components 2004 LTD
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：4470Vrms
- Current Transfer Ratio (Min)：63% @ 10mA
- Current Transfer Ratio (Max)：125% @ 10mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：4µs, 3µs
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：70V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.65V (Max)
- Current - DC Forward (If) (Max)：50 mA
- Vce Saturation (Max)：400mV
- Operating Temperature：-30°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 SFH617A-2G is a single-channel optocoupler featuring an infrared LED input and NPN silicon phototransistor output. It utilizes a 4-pin DIP through-hole package for standard PCB mounting. Key electrical parameters include a maximum forward voltage of 1.65V, a typical rise time of 2µs, and a typical fall time of 3µs. The device supports a maximum input current of 50 mA and offers a minimum current transfer ratio of 63%. Isolation capabilities are rated at 4470 Vrms with a peak isolation voltage of 7500 V.
Feature Summary
- Provides galvanic isolation between input and output circuits using infrared light transmission.
- Integrates an NPN silicon phototransistor for reliable digital signal switching applications.
- Designed for through-hole mounting in standard dual in-line packages.
Applications
- General-purpose signal isolation in industrial control systems
- Interface circuits for microcontrollers and logic gates
- Switching power supply feedback loops
Procurement Notes
Verify the specific suffix 'G' against manufacturer documentation to confirm compliance with RoHS directives and halogen-free status. Ensure the 4-pin DIP configuration matches the target footprint. Cross-reference the minimum current transfer ratio of 63% with circuit requirements to guarantee adequate noise margin during operation.
Selection Notes
Select this component when high-speed switching is not critical but robust isolation is required. The 3µs fall time limits suitability for very high-frequency data transmission. Compare the 63% CTR against load requirements to ensure sufficient collector current drive capability without exceeding maximum ratings.
Part Context
This part belongs to the SFH617 series of transistor-output optocouplers manufactured by Isocom Components 2004 LTD. It serves as a cost-effective solution for basic isolation tasks where moderate speed and standard voltage isolation levels are sufficient. The series is widely used in legacy and modern electronic designs requiring simple channel separation.
Replacement Considerations
The SFH617A-2X is a documented variant within the same product family. Verify pinout compatibility and electrical parameter equivalence before substitution. Ensure that any alternative component meets the same 4470 Vrms isolation rating and DIP-4 package dimensions.
