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Product Detailed Parameters
- Description：6PIN DARLINGTON OUTPUT, NON-BASE
- Series：-
- Mfr：Isocom Components 2004 LTD
- Package：Tube
- Number of Channels：-
- Voltage - Isolation：-
- Current Transfer Ratio (Min)：-
- Current Transfer Ratio (Max)：-
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：-
- Input Type：-
- Output Type：-
- Voltage - Output (Max)：-
- Current - Output / Channel：-
- Voltage - Forward (Vf) (Typ)：-
- Current - DC Forward (If) (Max)：-
- Vce Saturation (Max)：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The 4N31FSM is a single-channel optoisolator manufactured by Isocom Components 2004 LTD. It features a Darlington transistor output configuration and accepts DC input signals. The device provides high electrical isolation with a voltage rating of 5300Vrms. Typical switching performance includes a rise time of 60µs and a fall time of 53µs. The maximum output voltage is specified at 80V. This component is housed in a 6-pin package designed for through-hole or surface mounting applications requiring reliable signal transmission across isolated circuits.
Feature Summary
- Darlington transistor output structure for high current gain
- High isolation voltage capability of 5300Vrms
- DC input signal compatibility
- Single channel configuration
Applications
- General purpose signal isolation
- Microprocessor system interfacing
- Solid-state relay driver circuits
Procurement Notes
Verify the specific suffix 'FSM' against official manufacturer documentation to confirm pinout, packaging type, and compliance certifications. Ensure the selected variant matches the required isolation voltage and output configuration for the target circuit design before finalizing procurement orders.
Selection Notes
Select this component when high current transfer ratio is needed due to the Darlington output stage. Consider the relatively slow switching speeds (microsecond range) which limit suitability for high-frequency data transmission. Verify that the 80V output voltage rating meets the load requirements of the receiving side of the isolated circuit.
Part Context
Isocom Components 2004 LTD specializes in infrared optoelectronic devices, including optocouplers and optoswitches. The company positions its products as alternatives to standard industry types, often providing components from manufacturers who have discontinued specific part numbers. Their portfolio focuses on meeting specific customer circuit design requirements through specialized parameter selection.
Replacement Considerations
Cross-reference with original datasheets if replacing legacy parts. Verify pin compatibility and electrical parameters such as CTR and isolation voltage against the original component specifications to ensure functional equivalence in the existing circuit layout.
