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FOD817
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 4-DIP
- Series：-
- Mfr：onsemi
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：5000Vrms
- Current Transfer Ratio (Min)：50% @ 5mA
- Current Transfer Ratio (Max)：600% @ 5mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：4µs, 3µs
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：70V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.2V
- Current - DC Forward (If) (Max)：50 mA
- Vce Saturation (Max)：200mV
- Operating Temperature：-55°C ~ 110°C
- Mounting Type：Through Hole
- Package / Case：4-DIP (0.300", 7.62mm)
- Supplier Device Package：4-DIP
- Grade：-
- Qualification：-
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Overview
The FOD817 is a single-channel phototransistor output optocoupler from onsemi’s FOD series. It integrates a gallium arsenide infrared emitting diode with an NPN phototransistor in a four-pin DIP package. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a maximum forward current of 50 mA, and an isolation voltage of 5000 Vrms. The device features typical rise and fall times of 18 µs, a forward voltage of 1.4 V, and a collector-emitter saturation voltage of 200 mV. Operating temperature ranges from -55°C to +110°C.
Feature Summary
- Provides high-voltage isolation between input and output circuits via optical coupling.
- Integrates a gallium arsenide infrared LED with an NPN phototransistor for signal transmission.
- Supports direct current input signals for reliable digital switching applications.
Applications
- Industrial control systems requiring circuit isolation
- Power supply feedback loops
- Signal isolation in microprocessor interfaces
Procurement Notes
Verify the specific suffix code (e.g., A3S, D300W) to confirm current transfer ratio grades and packaging type. Ensure the selected variant matches the required insulation voltage and operating temperature range. Confirm RoHS compliance status through official manufacturer documentation before procurement.
Selection Notes
Select based on required current transfer ratio and package style. Standard DIP variants suit through-hole designs, while surface-mount options like FOD817DS offer SMD compatibility. Verify that the 50 mA maximum forward current and 70 V collector voltage meet system requirements.
Part Context
The FOD817 belongs to onsemi’s FOD series of 4-pin DIP phototransistor optocouplers. This family provides general-purpose isolation solutions using standard DIP-4 or MDIP packages. The series is designed for cost-effective signal isolation in various electronic applications.
Replacement Considerations
Compatible substitutes include FOD814 and FOD816. Verify pinout compatibility and electrical parameter equivalence before substitution.
FAQ
What is the typical rise and fall time for the FOD817?
The typical rise and fall times are both 18 µs.
Does the FOD817 support AC input signals?
No, the FOD817 is specified for DC input signals only.
