FOD819S

Overview

The FOD819S is a high-speed phototransistor optocoupler from onsemi, featuring a single channel and SMD-4 surface-mount package. It provides 5000 Vrms isolation voltage with an NPN phototransistor output. Key electrical parameters include a maximum collector-emitter voltage of 70 V, forward current of 50 mA, and typical rise/fall times of 18 μs. The device operates within a temperature range of -55°C to +105°C.

Feature Summary

• High-speed signal transmission capability for efficient data isolation
• Robust 5000 Vrms insulation voltage ensuring safe circuit separation
• Compact SMD-4 surface-mount design for automated assembly integration

Applications

• Industrial control system signal isolation
• Power supply feedback loop monitoring
• Communication interface data transfer protection

Procurement Notes

Verify the specific suffix 'S' corresponds to the SMD-4 package variant rather than DIP configurations. Confirm that the component status is active, as some sources indicate potential obsolescence for related FOD819 variants. Ensure compliance with RoHS directives and check for any specific handling requirements due to the surface-mount construction.

Selection Notes

Select this component when high-speed switching is required alongside strong isolation capabilities in a compact footprint. Compare against standard speed variants if timing constraints are less critical. Verify that the 70 V collector-emitter voltage rating meets the load requirements of the target application circuit without exceeding saturation limits.

Part Context

This part belongs to the FOD819 series of high-speed phototransistor optocouplers. It shares functional similarities with other members like the FOD814 and FOD817 but offers distinct speed characteristics and packaging options. The series is designed for applications requiring reliable galvanic isolation between input and output circuits.

FAQ

What is the typical propagation delay for the FOD819S?

The typical rise and fall times are specified at 18 μs.

Does the FOD819S support AC or DC input signals?

It is designed for DC input signals driving the internal LED.