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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),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：4-SOP
- Grade：-
- Qualification：-
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Overview
The IS281BL is a four-channel surface-mount optocoupler manufactured by Isocom Components. It integrates infrared light-emitting diodes with NPN silicon phototransistors in a 16-pin SOP package. The device provides electrical isolation between input and output circuits, featuring a maximum forward voltage of 1.4V and an isolation voltage of 3750Vrms. It operates within a temperature range of -55°C to 110°C, with typical rise and fall times of 6μs. The current transfer ratio ranges from a minimum of 50% to a maximum of 600%, supporting DC input applications.
Feature Summary
- Four independent channels for high-density signal isolation
- NPN phototransistor output for digital logic interfacing
- Surface-mount packaging for automated assembly
Applications
- Logic-to-logic isolation in noisy environments
- Industrial control systems
- Computer peripheral interfaces
Procurement Notes
Verify the specific suffix 'BL' against official Isocom documentation to confirm exact binning or tape-and-reel specifications. Ensure compliance requirements such as RoHS and UL certification are explicitly stated for this variant. Cross-reference pinout and thermal characteristics with the manufacturer's datasheet before integration.
Selection Notes
Select this component when multi-channel isolation is required in a compact surface-mount form factor. Consider the 3750Vrms isolation rating for safety-critical applications. Evaluate the 6μs switching speed against system timing requirements. Confirm that the NPN output configuration aligns with the receiving circuit design.
Part Context
Isocom Components specializes in optical couplers and often provides industry-standard replacements. The IS281 series belongs to their compact SMD lineup, designed for high-density PCB layouts. This brand focuses on commercial and industrial-grade isolators compatible with major semiconductor manufacturers.
Replacement Considerations
Publicly confirmed substitute part numbers for IS281BL are not available in the provided source material.
