Common mode filter for signal lines
The TDK ACM2012H-900-2P-T00 is a 2-line common mode filter from the ACM-H series, designed for signal line EMI suppression. It presents 90 Ohms of common mode impedance at 100 MHz, attenuating conducted noise on differential signal pairs without degrading the data waveform. Rated for 300 mA continuous current with a maximum DC resistance of 300 mOhm, the filter introduces minimal voltage drop in the signal path.
The 4-pad configuration is the standard footprint for common mode filters in this form factor — the two outer pads carry the signal and the inner pads are the common mode return. The filter is supplied in Tape & Reel (TR) and Cut Tape (CT) packaging for pick-and-place assembly.
For existing BOM lines, the filter is available through independent surplus and broker channels. Sourcing is confirmed per RFQ — quantities are lot-specific, and current pricing and availability are verified at quote time. No pin-compatible drop-in replacement from TDK is documented.