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Product Detailed Parameters
- Description：OPTOISO 3.75KV 1CH TRANS 4-SOP
- Series：-
- Mfr：Vishay Semiconductor Opto Division
- Package：Tape & Reel (TR),Cut Tape (CT)
- Number of Channels：1
- Voltage - Isolation：3750Vrms
- Current Transfer Ratio (Min)：50% @ 5mA
- Current Transfer Ratio (Max)：150% @ 5mA
- Turn On / Turn Off Time (Typ)：5µs, 3µs
- Rise / Fall Time (Typ)：3µs, 4µs
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：70V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.15V
- Current - DC Forward (If) (Max)：50 mA
- Vce Saturation (Max)：300mV
- Operating Temperature：-55°C ~ 100°C
- Mounting Type：Surface Mount
- Package / Case：4-SMD, Gull Wing
- Supplier Device Package：4-SOP (2.54mm)
- Grade：-
- Qualification：-
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Overview
The SFH690AT is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output housed in a compact SOP-4 surface-mount package with a 2.54mm pitch. The device provides high isolation capability of 3750 Vrms, suitable for protecting low-voltage control circuits from high-voltage noise. Key electrical parameters include a maximum collector-emitter voltage of 70V and a maximum collector current of 100mA. The current transfer ratio ranges from 50% to 150%, with typical switching times of 3µs rise and 4µs fall. It operates within a temperature range of -55°C to +100°C.
Feature Summary
- Provides galvanic isolation between input and output circuits using a phototransistor configuration.
Applications
- Signal isolation in industrial control systems
- Interface between microcontrollers and high-voltage loads
- Noise suppression in power supply feedback loops
Procurement Notes
Verify the specific suffix 'AT' against the manufacturer's latest datasheet to confirm pinout compatibility and packaging details. Ensure that the required current transfer ratio specifications align with the 50-150% range documented for this variant. Confirm RoHS compliance status through official documentation before integration into regulated assemblies.
Selection Notes
Select this component when a small footprint SOP-4 package is required for surface-mount assembly. It is appropriate for applications demanding moderate speed switching with 3µs rise time. Consider the 3750 Vrms isolation rating for safety-critical interfaces. Verify that the 70V collector-emitter voltage meets the load requirements of the target circuit design.
Part Context
This part belongs to the SFH690 series of transistor output optocouplers. The series offers various configurations including different CTR ranges and package options. The SFH690AT specifically denotes the standard CTR range version in the SOP-4 package. This family is designed for general-purpose isolation tasks requiring reliable performance across wide temperature ranges.
Replacement Considerations
The SFH690ABT is a related variant within the same series but may differ in current transfer ratio specifications. Verify functional equivalence by comparing isolation voltage and switching speeds. Cross-reference with other SOP-4 transistor optocouplers only if pinouts and electrical limits match exactly.
