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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 SFH690AT3 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output with a current transfer ratio (CTR) ranging from 50% to 150%. The device provides an isolation voltage of 3750 Vrms and operates within a temperature range of -55°C to +100°C. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a maximum forward current of 50 mA, and a typical rise time of 3 µs. It is housed in a 4-SOP surface-mount package.
Feature Summary
- Provides high-voltage electrical isolation between input and output circuits
- Utilizes an NPN phototransistor for digital signal transmission
- Designed for surface-mount assembly in compact layouts
Applications
- Industrial control systems requiring galvanic isolation
- Signal isolation in microprocessor-based interfaces
- Power supply feedback loops
Procurement Notes
Verify the specific CTR bin (50-150%) required for your application against the datasheet specifications. Confirm that the 4-SOP package dimensions match your PCB footprint. Ensure compatibility with the 3750 Vrms isolation rating for your safety requirements. Check RoHS compliance status if restricted substances are a concern for your manufacturing process.
Selection Notes
Select this component when a low-cost, general-purpose optocoupler with moderate speed is needed. The 50-150% CTR range offers flexibility for various drive currents. Consider the 3 µs rise time for applications not requiring high-speed data transmission. The SOP-4 package facilitates automated placement in standard SMT lines.
Part Context
This part belongs to the SFH690 family of Vishay's transistor output optocouplers. Variants such as SFH690ABT and SFH690BT3 offer different CTR ranges (50-150% and 100-300%, respectively). All share similar electrical characteristics and packaging, differing primarily in the guaranteed current transfer ratio performance levels.
Replacement Considerations
Direct substitutes include SFH690ABT (50-150% CTR) and SFH690BT3 (100-300% CTR). Verify that the replacement variant meets the specific CTR requirements of the circuit design. Ensure pinout compatibility remains identical across the family variants.
