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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)：100% @ 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：-
- Grade：-
- Qualification：-
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Overview
The IS281GB 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 utilizes a 4-SOIC surface-mount package with a width of 4.40mm. Key electrical parameters include a maximum collector-emitter voltage of 80V, a peak forward current of 60mA, and a typical forward voltage of 1.2V. The current transfer ratio ranges from 50% to 600% at a forward current of 10mA, with a maximum saturation voltage of 200mV and typical rise/fall times of 5µs and 3µs respectively.
Feature Summary
- Provides high-voltage galvanic isolation between input and output circuits
- Features fast switching performance suitable for digital signal transmission
- Designed for robust operation across extended industrial temperature ranges
Applications
- Industrial control systems requiring signal isolation
- Power supply protection and monitoring circuits
- Smart metering and utility instrumentation
Procurement Notes
Verify the specific suffix GB indicates the tape-and-reel packaging format when ordering. Confirm RoHS3 compliance status for environmental regulations. Ensure the 4-SOIC footprint matches the target PCB layout dimensions. Cross-reference the manufacturer part number with distributor catalogs to confirm availability and lead times. Validate that the operating temperature range meets the specific application requirements.
Selection Notes
Select this component when a single-channel transistor output isolator is required for low-power signal transmission. Consider the 3750Vrms isolation rating for safety-critical applications. Evaluate the 50-600% CTR range to ensure adequate noise margin in the receiving circuit. Verify that the 4-pin SOIC package fits within the available board space constraints.
Part Context
The IS281GB belongs to the Isocom Components line of general-purpose optocouplers. These devices are designed as replacements for legacy industry-standard parts. The series offers various pin configurations and insulation ratings to support diverse electronic design needs across consumer and industrial sectors.
Replacement Considerations
Check datasheets for equivalent single-channel transistor output optocouplers with similar isolation voltages and package types. Verify pin compatibility and electrical parameter overlaps before substitution.
