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FOD785D
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Product Detailed Parameters
- Description：OPTOISOLTR 5KV 1CH TRANS 4-PDIP
- Series：-
- Mfr：onsemi
- Package：Tube
- Number of Channels：1
- Voltage - Isolation：5000Vrms
- Current Transfer Ratio (Min)：300% @ 5mA
- Current Transfer Ratio (Max)：600% @ 5mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：18µs, 18µs (Max)
- 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)：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-PDIP
- Grade：-
- Qualification：-
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Overview
The FOD785D is a single-channel transistor output optocoupler manufactured by onsemi. It features a 4-pin DIP package and provides 5000Vrms isolation voltage between input and output circuits. The device incorporates thermal shutdown protection to prevent damage during over-temperature conditions. It supports a maximum forward current of 50mA and operates within a temperature range of -55°C to 110°C. Typical rise and fall times are 18μs, ensuring reliable signal transmission for digital logic isolation applications.
Feature Summary
- Integrated thermal shutdown protection for enhanced reliability
- High isolation voltage capability for safe circuit separation
- Robust surge protection and current limiting mechanisms
Applications
- Digital logic signal isolation
- General-purpose optoisolation in industrial equipment
- Power supply feedback loops
Procurement Notes
Verify the specific suffix 'D' indicates the 4-pin DIP package configuration. Confirm compliance with RoHS directives as listed in official documentation. Check for UL, C-UL, and VDE certifications if required for end-product safety standards. Ensure the ordering part number matches the exact package and tape/reel specifications provided by onsemi.
Selection Notes
Select this component when high isolation voltage and thermal protection are critical. Consider the 18μs switching speed for moderate-speed digital applications. Verify that the 4-pin DIP package fits the PCB layout constraints. Compare against other FOD series devices if different output types or speeds are needed.
Part Context
The FOD785D belongs to onsemi's FOD series of optocouplers, designed for robust signal isolation. It complements other devices in the lineup by offering integrated thermal management. The series is widely used in industrial and consumer electronics where reliable galvanic isolation is required between low-voltage control circuits and higher-voltage power stages.
Replacement Considerations
Consult onsemi datasheets for direct pin-compatible alternatives within the FOD series. Verify that any substitute maintains the 5000Vrms isolation rating and thermal shutdown feature. Cross-reference package dimensions and electrical characteristics to ensure functional equivalence.
