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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)：40% @ 10mA
- Current Transfer Ratio (Max)：80% @ 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-1G is a single-channel transistor output optocoupler manufactured by Isocom Components 2004 LTD. It features an NPN silicon phototransistor coupled with an infrared LED, providing electrical isolation of 4470Vrms. The device is housed in a 4-pin PDIP package and supports a maximum forward current of 50 mA. Key electrical parameters include a collector-emitter voltage of 70 V, a collector current of 50 mA, and a typical rise time of 2 µs.
Feature Summary
- Provides high-voltage electrical isolation between input and output circuits using an infrared LED and NPN phototransistor configuration.
- Features fast switching performance with a typical rise time of 2 microseconds for signal transmission applications.
- Designed for through-hole mounting in a standard 4-pin DIP package to facilitate integration into printed circuit boards.
Applications
- Signal isolation in industrial control systems
- Interface circuits for microcontrollers and logic devices
- Power supply feedback loops
Procurement Notes
Verify the specific manufacturer designation, as the SFH617A series is also produced by Vishay Semiconductors under equivalent part numbers such as VO617A-1. Confirm that the 4470Vrms isolation rating aligns with your system requirements, as other variants in the family may offer different isolation levels like 5300Vrms. Ensure the 4-pin PDIP package matches your PCB footprint constraints before finalizing procurement.
Selection Notes
Select this component when a low-cost, general-purpose optocoupler with moderate speed is required. The SFH617A-1G offers a balance of performance and cost for basic isolation tasks. Consider alternative variants within the SFH617A family if higher current transfer ratios or different isolation voltages are needed. Verify compatibility with the driving circuit's voltage levels and the load requirements of the phototransistor side.
Part Context
The SFH617A-1G belongs to the broader SFH617A series of transistor output optocouplers. This series is widely used for general-purpose isolation in electronic designs. The '1' suffix typically denotes the specific pinout and internal configuration variant within the family, distinguishing it from other options like the SFH617A-2X which may have different packaging or electrical characteristics.
Replacement Considerations
The Vishay Semiconductors VO617A-1 is a direct functional equivalent within the same product family. When substituting, verify that the isolation voltage and package dimensions are compatible with the existing design constraints.
