SF20

Overview

The Astrodyne TDI SF20 is a high-performance, single-phase EMI filter designed for switch mode applications. It features a two-stage configuration to provide robust electromagnetic interference suppression. The unit is rated for a continuous current of 20 A and operates at voltages up to 250 VAC within the 50/60 Hz frequency range. It utilizes a threaded post termination style with 8-32 threads for secure mounting. This component serves as a general-purpose power line filter module suitable for various electronic equipment requiring effective noise reduction.

Feature Summary

• Two-stage filtering architecture for enhanced noise attenuation
• High current capacity of 20 A for demanding loads
• Threaded post termination for reliable mechanical connection

Applications

• Switch mode power supply input stages
• General purpose electronic equipment
• Industrial control systems

Procurement Notes

Verify the specific datasheet version and compliance documentation prior to procurement. Confirm that the 8-32 threaded post termination matches the host system's mounting hardware. Ensure the 20 A current rating and 250 VAC voltage limit are sufficient for the target application environment. Check for any regional distribution restrictions or backorder status from authorized suppliers before finalizing orders.

Selection Notes

Select this component when a compact, single-phase solution is required for switch mode power supplies. The two-stage design offers superior performance compared to single-stage alternatives. Ensure the operating frequency aligns with standard 50/60 Hz mains or compatible ranges. Verify that the chassis or panel mounting method accommodates the threaded post interface securely.

Part Context

The SF20 belongs to the SF series of high-performance switch mode EMI filters manufactured by Astrodyne TDI. These modules are engineered to meet stringent EMC standards for general-purpose applications. The series focuses on providing effective RFI/EMI suppression in a compact form factor suitable for integration into various power conditioning systems.

Replacement Considerations

No public confirmed substitute part numbers are available.