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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)：160% @ 10mA
- Current Transfer Ratio (Max)：320% @ 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 (0.300", 7.62mm)
- Supplier Device Package：4-DIP
- Grade：-
- Qualification：-
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Overview
The SFH617A-4 is a single-channel transistor output optocoupler manufactured by Isocom Components 2004 LTD. It features an NPN phototransistor output and operates within a temperature range of -55°C to +110°C. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a maximum collector current of 50 mA, and a forward current of 60 mA. The device provides an isolation voltage of 5300 Vrms with a typical forward voltage of 1.65 V. Performance metrics specify a minimum current transfer ratio of 160% and a maximum of 320%. Switching characteristics include a rise time of 4.6 µs and a fall time of 15 µs. Power dissipation is rated at 150 mW.
Feature Summary
- Provides galvanic isolation between input and output circuits using infrared LED and NPN phototransistor technology.
- Features high insulation capability suitable for safety-critical signal transmission applications.
- Designed for through-hole mounting in standard DIP-4 packages for reliable PCB integration.
Applications
- General-purpose signal isolation in industrial control systems
- Interface circuits for microprocessors and logic systems
- Power supply feedback loops requiring voltage isolation
Procurement Notes
Verify the manufacturer designation on the component marking against official Isocom Components 2004 LTD documentation. Confirm that the specific part number suffix matches the required CTR bin and package variant. Ensure compliance with relevant RoHS directives as specified in the latest datasheet before procurement.
Selection Notes
Select this component when a single-channel isolation barrier with moderate speed is required. Consider the 160% to 320% CTR range for appropriate drive circuit design. Verify that the 70 V collector-emitter voltage rating meets the load requirements. Check thermal limits against expected operating conditions.
Part Context
This component belongs to the family of transistor output optocouplers designed for general-purpose isolation. It shares functional similarities with other DIP-4 isolators but is distinguished by its specific CTR range and switching speeds. The part serves as a fundamental building block for creating electrically isolated signal paths in electronic assemblies.
Replacement Considerations
The VO617A-4 is listed as a recommended alternative. Verify pin compatibility and electrical parameter equivalence before substitution. Cross-reference datasheets to ensure matching isolation voltages and current transfer ratios.
