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Product Detailed Parameters
- Description：OPTOISO 5.3KV 1CH TRANS W/BASE
- Series：4N28
- Mfr：Isocom Components 2004 LTD
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：5300Vrms
- Current Transfer Ratio (Min)：10% @ 10mA
- Current Transfer Ratio (Max)：-
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：2µs, 2µs
- Input Type：DC
- Output Type：Transistor with Base
- Voltage - Output (Max)：30V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.2V
- Current - DC Forward (If) (Max)：60 mA
- Vce Saturation (Max)：500mV
- Operating Temperature：-55°C ~ 100°C
- Mounting Type：Surface Mount
- Package / Case：6-SMD, Gull Wing
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The 4N28SM is a surface-mount optoisolator manufactured by Isocom Components 2004 LTD. It features a single channel with a phototransistor output and base terminal. The device provides an isolation voltage of 5300Vrms. Key electrical parameters include a maximum forward current of 60 mA, a minimum current transfer ratio of 63%, and a maximum forward voltage of 1.5V. It is housed in a 6-pin DIP package.
Feature Summary
- Integrates an infrared emitting diode with a phototransistor for signal transmission
- Includes a base terminal on the phototransistor for improved switching speed control
- Provides high-voltage electrical isolation between input and output circuits
Applications
- Industrial process control systems requiring galvanic isolation
- Solid-state relay driver circuits
- Microcontroller interface applications for noise immunity
Procurement Notes
Verify the specific datasheet version from Isocom Components to confirm pinout compatibility and absolute maximum ratings. Ensure the surface-mount package dimensions match the target PCB footprint. Confirm RoHS compliance status if required by assembly specifications.
Selection Notes
Select this component when a standard transistor-output optocoupler with a base terminal is needed for faster response times compared to base-less variants. Consider the 5300Vrms isolation rating for safety requirements. Evaluate the 63% minimum CTR against the load requirements of the driven circuit.
Part Context
This part belongs to the 4N28 series of single-channel optocouplers. It serves as the surface-mount equivalent to through-hole versions like the 4N28. The inclusion of a base terminal distinguishes it from basic phototransistor outputs, allowing for external biasing to enhance performance.
Replacement Considerations
Direct replacements include other 4N28-series surface-mount devices from different manufacturers that maintain identical pinouts and electrical characteristics. Verify that substitute parts offer comparable isolation voltage and current transfer ratio specifications.
