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Product Detailed Parameters
- Description：OPTOISOLATOR 3.75KV 1CH TRANS
- Series：-
- Mfr：Isocom Components 2004 LTD
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of Channels：1
- Voltage - Isolation：3750Vrms
- Current Transfer Ratio (Min)：130% @ 5mA
- Current Transfer Ratio (Max)：260% @ 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：-
- Grade：-
- Qualification：-
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Overview
The IS281B is a single-channel optoisolator manufactured by Isocom Components 2004 LTD, featuring a transistor output configuration. It provides an isolation voltage of 3750Vrms and operates within a temperature range of -55°C to 110°C. The device accepts a maximum DC forward current of 60 mA with a typical forward voltage of 1.2V. Output specifications include a collector-emitter saturation voltage of 200mV (max) and a maximum output voltage of 80V. The current transfer ratio ranges from 50% to 600% at 10mA input. Rise and fall times are typically 5µs and 3µs respectively. It is housed in a surface-mount 4-SOIC package.
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 designation against official manufacturer documentation to ensure correct CTR binning and packaging type. Confirm RoHS compliance status and moisture sensitivity level requirements prior to integration into production workflows.
Selection Notes
Select this component when a compact surface-mount solution is required for galvanic isolation in low-to-medium speed digital interfaces. Ensure the 80V output voltage rating meets the load requirements and that the 4-SOIC footprint aligns with the PCB layout constraints.
Part Context
The IS281B belongs to the IS281 series of general-purpose optocouplers produced by Isocom Components. This series is designed as a replacement for legacy components in various electronic assemblies, offering standardized pinouts and electrical characteristics compatible with common industry designs.
Replacement Considerations
Cross-reference with IS281 variants for different current transfer ratio bins or packaging options such as tape and reel versus cut tape. Verify pin compatibility with existing designs before substitution.
