FOD817A3SD

$0.41

Description：OPTOISOLATOR 5KV 1CH TRANS 4-SMD
Series：-
Mfr：onsemi
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:54f3e25b2867 Category: Transistor, Photovoltaic Output Optoisolators Brand: onsemi

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Product introduction

Product Detailed Parameters

Description：OPTOISOLATOR 5KV 1CH TRANS 4-SMD
Series：-
Mfr：onsemi
Package：Tape & Reel (TR),Cut Tape (CT)
Number of Channels：1
Voltage - Isolation：5000Vrms
Current Transfer Ratio (Min)：80% @ 5mA
Current Transfer Ratio (Max)：160% @ 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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FOD817A3SD

Overview

The FOD817A3SD is a single-channel phototransistor output optocoupler from onsemi's FOD series. It features a surface-mount 4-SMD (gull-wing) package with 5000Vrms isolation voltage. The device accepts DC input, with a maximum forward current of 50mA and typical forward voltage of 1.2V. Key electrical parameters include a minimum Current Transfer Ratio (CTR) of 80% and maximum of 160% at 5mA input. Typical rise and fall times are 4µs and 3µs respectively. It supports a collector-emitter voltage of 70V, max collector current of 50mA, and operates within a temperature range of -55°C to 110°C.

Feature Summary

Provides high-voltage isolation between input and output circuits using phototransistor technology.
Offers compact surface-mount packaging suitable for automated assembly processes.
Ensures reliable signal transmission with defined current transfer ratio characteristics.

Applications

General-purpose signal isolation in industrial control systems
Interface circuits for microcontrollers and logic devices
Power supply feedback loops requiring galvanic separation

Procurement Notes

Verify the specific suffix '3SD' corresponds to the 4-SMD gull-wing package configuration rather than standard DIP variants. Confirm RoHS compliance status and moisture sensitivity level (MSL 1) requirements for your manufacturing process. Ensure the supplier provides official datasheets matching the onsemi part number to avoid confusion with similar FOD817 family members that may have different pinouts or performance specifications.

Selection Notes

Select this component when surface-mount installation is required for single-channel isolation applications. Compare the 80-160% CTR range against circuit gain requirements. Consider the 4µs/3µs switching speeds for frequency limitations. Verify that the 5000Vrms isolation rating meets safety standards for your specific application environment compared to lower-rated alternatives.

Part Context

This part belongs to the widely used FOD817 family of optocouplers, known for cost-effective isolation solutions. The '3SD' suffix specifically denotes the surface-mount variant, distinguishing it from through-hole DIP versions like the FOD817A. It serves as a direct physical replacement for legacy DIP designs where PCB space constraints necessitate SMD components.

Replacement Considerations

Direct pin-compatible replacements include other FOD817A3SD units from qualified manufacturers. Cross-reference with PC817A3S or LTV-817S for mechanical fit, but verify electrical parameters such as CTR and isolation voltage independently. Ensure substitute parts maintain the same 4-SMD gull-wing footprint and lead configuration.