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Product Detailed Parameters
- Description：OPTOISOLTR 5.3KV 1CH TRANS 4-DIP
- Series：SFH628A-2
- Mfr：Isocom Components 2004 LTD
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：5300Vrms
- Current Transfer Ratio (Min)：63% @ 1mA
- Current Transfer Ratio (Max)：200% @ 1mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：4µs, 3µs
- Input Type：AC, DC
- Output Type：Transistor
- Voltage - Output (Max)：55V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.5V (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 SFH628A-2 is a single-channel optocoupler featuring inverse parallel infrared LEDs and an NPN silicon phototransistor. It supports AC input with a maximum forward voltage of 1.5V and max input current of 50 mA. Key electrical parameters include a minimum CTR of 160%, typical rise time of 4µs, and isolation voltage of 5.3 kVrms (7500 V Pk). The device is housed in a 4-pin DIP package.
Feature Summary
- Inverse parallel LED configuration enables direct AC signal coupling without external rectification.
Applications
- AC line detection circuits
- Solid-state relay driver interfaces
- Zero-crossing detection systems
Procurement Notes
Verify the specific suffix against official Isocom documentation to confirm pinout and packaging variations. Ensure compliance requirements such as UL or VDE ratings match the intended application safety standards before finalizing procurement specifications.
Selection Notes
Select this component for applications requiring robust AC input handling within a standard DIP footprint. Consider the 160% minimum CTR and 5.3 kVrms isolation rating when designing circuits that demand high reliability and noise immunity in industrial environments.
Part Context
Isocom Components specializes in industry-standard replacements and discontinued optocouplers. The SFH628A series serves as a functional alternative to legacy silicon photo-transistor isolators, maintaining compatibility with established circuit designs while offering modern manufacturing consistency.
Replacement Considerations
The SFH628A-3 and SFH628A-4 are documented variants within the same series. Verify pinout compatibility and specific electrical tolerances before substituting these parts in existing designs.
FAQ
How does the SFH628A-2 handle AC input signals?
It utilizes two infrared LEDs connected in inverse parallel, allowing it to conduct during both positive and negative half-cycles of an AC waveform.
What is the isolation voltage rating?
The device provides an isolation voltage of 5.3 kVrms with a peak withstand voltage of 7500 V.
