SPDL2012-121-2P-T

Overview

The SPDL2012-121-2P-T is a two-line surface mount common mode choke manufactured by Signal Transformer. It features an impedance of 120 Ohms at 100 MHz with a tolerance of +/-25%. The component supports a maximum DC current of 400 mA and has a maximum DC resistance of 300 mOhms. Designed for PCB mounting, it operates within a temperature range of -40°C to +125°C. The physical dimensions are 2.0 mm in length, 1.2 mm in width, and 1.2 mm in height, conforming to the 0805 metric package.

Feature Summary

• Provides noise suppression for common mode signals while maintaining low differential mode impedance to preserve signal integrity.
• Constructed as an ultra-compact wirewound component suitable for space-constrained printed circuit board layouts.
• Engineered to meet AEC-Q200 qualification standards for automotive electronic applications.

Applications

• Noise filtering for high-speed differential signal lines such as USB interfaces.
• Signal conditioning for IEEE 1394 (FireWire) connections.
• Electromagnetic interference suppression in Ethernet data lines.

Procurement Notes

Verify the specific manufacturing date code and lot traceability upon receipt to ensure compliance with project quality requirements. Confirm that the delivered components match the specified 120 Ohm impedance tolerance and 400 mA current rating. Check for physical damage to the SMD terminations before soldering. Ensure storage conditions adhere to moisture sensitivity level guidelines to prevent reliability issues during assembly.

Selection Notes

Select this component when a compact footprint is required for filtering high-speed digital signals. The 120 Ohm impedance value is appropriate for suppressing common mode noise without significantly attenuating the desired differential data. Consider the 400 mA current rating to ensure the choke does not saturate under normal operating conditions. Verify compatibility with the target PCB land pattern for the 0805 metric package.

Part Context

This part belongs to the SPDL series of ultra-compact common mode chokes from Signal Transformer. The series is designed for applications requiring significant size reduction compared to standard through-hole or larger surface mount alternatives. The SPDL2012 variant specifically targets dense PCB designs where minimal profile and small area are critical constraints for signal integrity management.

Replacement Considerations

Direct substitutes include the SPDL2012-161-2P-T for higher impedance requirements or the ACM2012-121-2P-T002 from TDK for equivalent electrical performance in similar packages. Verify pinout compatibility and thermal characteristics before swapping manufacturers.