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Product Detailed Parameters
- Description：OPTOISO 4.17KV DARL W/BASE 6-SMD
- Series：-
- Mfr：Fairchild Semiconductor
- Package：Bulk
- Number of Channels：1
- Voltage - Isolation：4170Vrms
- Current Transfer Ratio (Min)：100% @ 10mA
- Current Transfer Ratio (Max)：-
- Turn On / Turn Off Time (Typ)：5µs, 40µs (Max)
- Rise / Fall Time (Typ)：-
- Input Type：DC
- Output Type：Darlington with Base
- Voltage - Output (Max)：30V
- Current - Output / Channel：150mA
- Voltage - Forward (Vf) (Typ)：1.2V
- Current - DC Forward (If) (Max)：80 mA
- Vce Saturation (Max)：1V
- Operating Temperature：-40°C ~ 100°C
- Mounting Type：Surface Mount
- Package / Case：6-SMD, Gull Wing
- Supplier Device Package：6-SMD
- Grade：-
- Qualification：-
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Overview
The 4N30SM is a single-channel transistor output optocoupler manufactured by onsemi, formerly Fairchild Semiconductor. It features a Photodarlington output configuration housed in a 6-pin SMD-DIP package. Key electrical parameters include an insulation voltage of 4170 Vrms and a minimum current transfer ratio of 100%. The device supports a maximum forward current of 80 mA with a forward voltage of 1.5 V. It operates within a temperature range of -40°C to +100°C and has a power dissipation rating of 270 mW.
Feature Summary
- Provides high-voltage electrical isolation between input and output circuits using optical transmission.
- Utilizes a Photodarlington output structure to achieve high current transfer efficiency.
- Designed for surface-mount installation via a compact 6-pin SMD-DIP form factor.
Applications
- General-purpose signal isolation in electronic control circuits
- Interface between microcontrollers and high-voltage loads
- Switching applications requiring galvanic isolation
Procurement Notes
Verify the manufacturer designation carefully, as the component was originally developed by Fairchild Semiconductor and is now produced by onsemi. Confirm that the specific suffix 'SM' corresponds to the required SMD-DIP packaging variant rather than standard through-hole versions. Ensure compliance with RoHS directives if applicable to your assembly process. Cross-reference the datasheet revision date to guarantee parameter accuracy during integration.
Selection Notes
Select this component when a robust photodarlington output is required for high gain applications. The SMD-DIP package facilitates automated surface-mount assembly while maintaining DIP-compatible pin spacing. Evaluate the 4170 Vrms insulation rating against system safety requirements. Consider the 100% minimum CTR for reliable switching performance under varying temperature conditions and aging effects.
Part Context
This device belongs to the 4N30M series of general-purpose optocouplers. It serves as a modern surface-mount equivalent to legacy through-hole isolation components. The transition from Fairchild to onsemi represents a continuation of the product line under new manufacturing stewardship. It remains a standard solution for basic digital isolation tasks in industrial and consumer electronics.
Replacement Considerations
Direct substitutes include other 4N30-series variants such as the 4N30 or 4N30T, provided the package type matches the design constraints. Verify pinout compatibility and insulation voltage ratings before substitution. Alternative packages may require PCB layout modifications.
