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Product Detailed Parameters
- Description：OPTOISO 3.75KV 1CH TRANS 4-SOP
- Series：IS281
- Mfr：Isocom Components 2004 LTD
- Package：Tape & Reel (TR)
- Number of Channels：1
- Voltage - Isolation：3750Vrms
- Current Transfer Ratio (Min)：50% @ 5mA
- Current Transfer Ratio (Max)：600% @ 5mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：5µs, 3µs
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：80V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.2V
- Current - DC Forward (If) (Max)：60 mA
- Vce Saturation (Max)：200mV
- Operating Temperature：-55°C ~ 110°C
- Mounting Type：Surface Mount
- Package / Case：4-SOIC (0.173", 4.40mm Width)
- Supplier Device Package：4-SOP
- Grade：-
- Qualification：-
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Overview
The IS281I is a single-channel optoisolator manufactured by Isocom Components 2004 LTD. It features a DC input and a transistor output, providing electrical isolation with a rated voltage of 3750Vrms. The device operates within a temperature range of -55°C to 110°C and utilizes a surface-mount 4-SOIC package. Key electrical parameters include a maximum collector-emitter voltage of 80V, a typical forward voltage of 1.2V, and a saturation voltage of 200mV. The current transfer ratio ranges from 50% to 600% at a forward current of 10mA, with rise and fall times of 5µs and 3µs respectively.
Feature Summary
- Provides high-voltage electrical isolation between input and output circuits using infrared technology.
- Features a fast switching speed suitable for digital signal transmission applications.
- Designed for robust performance across extended industrial temperature ranges.
Applications
- Industrial control systems
- Power supply protection circuits
- Smart metering devices
Procurement Notes
Verify the specific suffix 'I' against official manufacturer documentation to confirm exact specifications, as standard listings may refer to the base IS281 model. Ensure compliance with RoHS3 standards and check moisture sensitivity level (MSL 1) requirements during storage and handling. Confirm package type matches the 4-SOIC specification before procurement.
Selection Notes
Select this component when a single-channel transistor output isolator is required for high-voltage separation. Consider the 3750Vrms isolation rating and the wide operating temperature range for demanding environments. Verify that the 50mA output current capability and 80V voltage rating align with the target circuit design constraints.
Part Context
The IS281 series belongs to Isocom Components' portfolio of high-performance infrared optoelectronic devices. Isocom specializes in phototransistor and photodarlington optocouplers, often serving as alternatives to discontinued parts from major manufacturers. The company emphasizes reliability and short lead times for commercial and industrial applications.
Replacement Considerations
Publicly confirmed substitute part numbers for the IS281I are not available in the provided source data. Cross-reference with generic single-channel transistor output optocouplers only if full parameter matching is verified through official datasheets.
