FOD817BS

Overview

The onsemi FOD817BS is a surface-mount, single-channel phototransistor optocoupler designed for industrial applications. It features an NPN phototransistor output with a collector-emitter voltage of 70V and a maximum collector current of 50mA. The device provides high isolation capability with a rated isolation voltage of 5000Vrms. Electrical performance includes a typical rise and fall time of 18μs, ensuring reliable signal transmission. The component operates within a temperature range of -55°C to +110°C and is housed in a compact SMD package suitable for automated assembly processes.

Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and phototransistor technology
• Features a compact surface-mount package design optimized for high-volume automated PCB assembly
• Delivers high common-mode transient immunity for stable operation in electrically noisy environments

Applications

• Industrial control systems requiring signal isolation
• Power supply feedback loops for voltage regulation
• Communication interface isolation for data transmission

Procurement Notes

Verify the specific suffix designation against official datasheets to confirm pin configuration and packaging style. Ensure compliance with RoHS directives and regional safety certifications such as UL, VDE, or IEC before integration. Cross-reference manufacturer part numbers with distributor catalogs to validate authenticity and traceability. Confirm that the selected variant matches the required thermal and electrical specifications for the target application environment.

Selection Notes

Select this component when a surface-mount solution is required for standard-speed signal isolation. Compare the CTR range and switching speed against system requirements to ensure adequate margin. Evaluate the package dimensions against available PCB real estate constraints. Consider the operating temperature range to guarantee reliability under extreme environmental conditions without derating issues.

Part Context

The FOD817BS belongs to the FOD817 family of optocouplers, which are industry-standard devices widely used for general-purpose isolation. This series offers a balance of performance and cost-effectiveness for various electronic designs. The BS suffix typically denotes a specific surface-mount package variation within the broader FOD817 product line, maintaining compatibility with traditional DIP pinouts while enabling modern manufacturing techniques.

FAQ

What is the maximum isolation voltage rating for the FOD817BS?

The FOD817BS supports an isolation voltage of 5000Vrms, providing robust protection between isolated circuits.

Does the FOD817BS support AC input signals?

No, the FOD817BS is designed for DC input applications, utilizing a direct-current driven infrared LED.