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FOD8173S
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 4-SMD
- 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：Surface Mount
- Package / Case：4-SMD, Gull Wing
- Supplier Device Package：4-SMD
- Grade：-
- Qualification：-
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Overview
The FOD8173S is a surface-mount, single-channel phototransistor optocoupler from onsemi’s FOD series. It features a 4-pin MDIP package with DC input capability. Key electrical parameters include a maximum forward voltage of 1.4V and a maximum input current of 50mA. The device provides an isolation voltage of 5000Vrms. Typical switching times are 18μs for both rise and fall durations. Operating temperature range spans from -55°C to +110°C. It complies with EN, IEC, and UL standards.
Feature Summary
- Provides galvanic isolation via infrared LED and NPN phototransistor interface.
- Supports surface-mount installation in compact 4-pin MDIP configurations.
- Ensures high-voltage safety with 5000Vrms insulation capability.
Applications
- General-purpose signal isolation in industrial control systems
- Power supply feedback loops requiring DC input coupling
- Microcontroller interface circuits for noise immunity
Procurement Notes
Verify the specific CTR bin (A, B, C, or D) required for your application, as the base part number may denote different gain ranges depending on suffixes. Confirm RoHS compliance status through official datasheets. Ensure the MDIP surface-mount variant matches your PCB footprint requirements. Cross-reference certification marks like UL or VDE if regulatory approval is mandatory for your end product.
Selection Notes
Select this component when a standard-speed, single-channel isolation solution is needed for surface-mount designs. Compare against through-hole DIP versions if board space allows for larger packages. Consider the 18μs switching speed suitability for low-frequency digital signals rather than high-speed data transmission. Evaluate thermal dissipation needs within the specified -55°C to +110°C operating range.
Part Context
This device belongs to the widely adopted FOD817 family, known for cost-effective isolation. The '3S' suffix typically indicates a specific current transfer ratio bin and surface-mount packaging format. It serves as a direct replacement for legacy through-hole 817-style optocouplers in modern SMD manufacturing processes while maintaining pin-out compatibility concepts.
Replacement Considerations
Direct substitutes include other manufacturers' 4-pin SMD phototransistor optocouplers with identical pinouts and similar CTR specifications. Verify that alternative parts meet the same 5000Vrms isolation rating and 1.4V forward voltage limits. Check for equivalent rise/fall time performance to ensure circuit timing integrity is maintained during substitution.
