FODM217A

Overview

The FODM217A is a single-channel transistor output optocoupler from onsemi, housed in a compact SOP-4 surface-mount package. It features an NPN phototransistor output with a high insulation voltage of 3750 Vrms, suitable for AC/DC sensing applications. The device supports a maximum forward current of 50 mA and a collector current of 50 mA, with a collector-emitter voltage rating of 80 V. Key electrical parameters include a minimum forward voltage of 1.4 V, a power dissipation of 150 mW, and a current transfer ratio ranging from 80% to 160%. Switching characteristics are defined by rise and fall times of 3 µs each, while the reverse voltage rating is 6 V. Operating temperatures span from -55°C to +110°C.

Feature Summary

• Provides galvanic isolation via a single-channel phototransistor architecture
• Supports AC and DC input sensing configurations
• Delivers high insulation voltage for safety-critical signal transmission

Applications

• AC and DC signal sensing circuits
• General-purpose digital isolation interfaces
• Microcontroller peripheral protection

Procurement Notes

Verify the specific suffix designation when ordering, as packaging formats vary between tube (standard) and reel/cut tape variants. Confirm RoHS compliance status through official documentation prior to integration. Ensure the selected package matches the intended surface-mount footprint requirements for the target PCB design.

Selection Notes

Select this component for designs requiring moderate speed isolation with a standard NPN output stage. The SOP-4 form factor offers space efficiency for dense layouts. Evaluate the 80–160% current transfer ratio range against drive circuit requirements to ensure adequate saturation margins under varying temperature conditions.

Part Context

This part belongs to the FODM217 series of transistor output optocouplers manufactured by onsemi. The series includes variants distinguished by current transfer ratio bins and packaging options, such as the FODM217B and FODM217C. All members share the same core electrical topology and physical dimensions, differing primarily in performance grading and supply format.

Replacement Considerations

Direct substitutes within the same family include FODM217B and FODM217C, which offer different current transfer ratio ranges but maintain identical pinouts and electrical ratings.