Obsolete 3-line common-mode filter — what the ratings mean for a replacement search
The TDK ACM4532-102-3P-T001 is a 3-line signal line EMI filter in the 1812 (4532 Metric) footprint, offering 1 kOhms of common-mode impedance at 100 MHz. The 200 mA current rating and 20 VDC voltage rating define the signal path it can clean — think low-current data lines like I²C, SPI, or sensor interfaces running under 20 V. The 600 mOhm max DCR means a 200 mA load drops 120 mV across the filter — budget that into the rail margin if the downstream IC runs near its minimum supply.
Lifecycle reality — discontinued, no official successor
TDK lists the ACM4532-102-3P-T001 as obsolete. For a BOM that already qualifies this footprint, the key cross-reference parameters are the 1812 case size, 3-line configuration, and the 1 kOhm impedance target at 100 MHz.
Sourcing posture — quoted to order
Discontinued by TDK, the ACM4532-102-3P-T001 is available through independent surplus and broker channels.
