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TDK Corporation ACM3225-271-2P-T — EMI Filters & Ferrite Beads

TDK ACM3225-271-2P-T 270 Ohm EMI Filter, 300 mA, Obsolete

MPNACM3225-271-2P-T
Obsolete

TDK Corporation ACM series common-mode filter, ACM3225-271-2P-T, 1210 (3225 Metric) SMD, 2-line, 270 Ohms @ 100 MHz, 300 mA, 20 VDC.

TDK Corporation ACM3225-271-2P-T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

ACM3225-271-2P-T specifications
ParameterValue
SeriesACM
Filter typeSignal Line
MountingSurface Mount
Voltage rating - DC20V
Current rating300mA
Impedance @ frequency270 Ohms @ 100 MHz
Operating temperature-25°C ~ 85°C
Height0.091\" (2.30mm)
Size (Dimension)0.126\" L x 0.098\" W (3.20mm x 2.50mm)
PackageTape & Reel (TR)
Case1210 (3225 Metric), 4 Leads
Number of lines2
DC resistance (DCR)300mOhm

Product details

Lifecycle status — obsolete, sourced through surplus channels

TDK lists the ACM3225-271-2P-T as Obsolete. Available through independent surplus and broker inventory.

What the 270 Ohm impedance means for the signal line

Rated 270 Ohms at 100 MHz, this is a common-mode filter for signal lines — the impedance peak targets conducted EMI in the 100 MHz band, typical for suppressing clock harmonics or switching noise on data pairs. Two-line configuration suits differential signal pairs such as USB, CAN, or LVDS where common-mode noise needs attenuation without degrading the differential signal.

Current rating and DC resistance — the DC loss trade-off

Rated 300 mA maximum with a DCR of 300 mOhm max. At full rated current, the self-heating from I²R loss is about 27 mW — negligible for the 1210 package, but the voltage drop across the filter (90 mV at 300 mA) should be budgeted in the rail margin.

1210 (3225 Metric) SMD package, 4-lead, surface-mount.

Frequently asked questions

Where can I buy ACM3225-271-2P-T and how do I get a price?

This part is obsolete and sourced through independent distribution.

What is the closest alternative to ACM3225-271-2P-T in the same family?

No official cross-reference or pin-compatible alternative is recorded from TDK. A functional replacement would need to match the 1210 footprint, 2-line configuration, 270 Ohm impedance at 100 MHz, and 300 mA current rating — verify the BOM position before substituting.