{"id":5460,"date":"2026-06-10T02:19:48","date_gmt":"2026-06-10T02:19:48","guid":{"rendered":"https:\/\/materialparts.com\/acm2012-121-2p-t002\/"},"modified":"2026-06-10T02:19:48","modified_gmt":"2026-06-10T02:19:48","slug":"acm2012-121-2p-t002","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/acm2012-121-2p-t002\/","title":{"rendered":"ACM2012-121-2P-T002"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The ACM2012-121-2P-T002 from TDK is a 2-line common mode choke filter for high-speed differential signal lines in a compact 2012 (0805) SMD package. With 120 Ohm common-mode impedance at 100MHz, 370mA rated current, and 220mOhm max DCR, it suppresses common-mode noise on USB, HDMI, and LVDS interfaces without degrading high-speed differential signals.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Filter Type<\/td>\nSignal Line Common Mode Choke<\/td>\n<\/tr>\n
Number of Lines<\/td>\n2 (differential pair)<\/td>\n<\/tr>\n
Common-Mode Impedance<\/td>\n120 Ohm typ (90 Ohm min) @ 100MHz<\/td>\n<\/tr>\n
Common-Mode Inductance<\/td>\n340 nH<\/td>\n<\/tr>\n
Rated Current<\/td>\n370 mA<\/td>\n<\/tr>\n
Rated Voltage<\/td>\n50 VDC<\/td>\n<\/tr>\n
DC Resistance (max)<\/td>\n220 mOhm<\/td>\n<\/tr>\n
Insulation Resistance<\/td>\n10 MOhm min<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-40 to +85 C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n0805 \/ 2012 metric (2.0 x 1.2 x 1.2 mm)<\/td>\n<\/tr>\n
Construction<\/td>\nWirewound, ferrite core<\/td>\n<\/tr>\n
RoHS<\/td>\nYes<\/td>\n<\/tr>\n
Packaging<\/td>\nEmbossed tape, 2000 pcs\/reel<\/td>\n<\/tr>\n
Status<\/td>\nNRND<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Compact 2012 (0805) package for space-constrained designs<\/li>\n
  • 120 Ohm common-mode impedance at 100MHz<\/li>\n
  • Low differential-mode impedance preserves signal integrity<\/li>\n
  • 370mA rated current for USB 2.0 and similar interfaces<\/li>\n
  • Wirewound construction for stable high-frequency performance<\/li>\n
  • High-speed differential signal line compatible<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • USB 2.0\/3.0 differential pair noise filtering<\/li>\n
    • HDMI signal line EMI suppression<\/li>\n
    • LVDS display panel link noise filtering<\/li>\n
    • IEEE 1394 signal line common-mode suppression<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The ACM2012-121-2P-T002 from TDK is a 2-line common mode choke filter for high-speed differential signal lines in a compact 2012 (0805) SMD package. With 120 Ohm common-mode impedance at 100MHz, 370mA rated current, and 220mOhm max DCR, it suppresses common-mode noise on USB, HDMI, and LVDS interfaces without degrading high-speed differential signals. Key […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[205],"class_list":["post-5460","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-tdk"],"acf":{"brief_explanation":"2-line CMC, 120Ohm @100MHz, 370mA, 0805 SMD, signal filter","date_code":"","package_case":"0805 \/ 2012 metric (2.0 x 1.2 x 1.2 mm)","in_stock":11580,"datasheet":"https:\/\/product.tdk.com\/en\/search\/emc\/emc\/cmf_cmc\/info?part_no=ACM2012-121-2P-T002","price":"$0.17 @ 2ku","product_introduction":"The ACM2012-121-2P-T002 from TDK is a 2-line signal common mode choke filter in a compact 0805 (2012 metric) surface-mount package. The ACM prefix denotes the common mode filter series for high-speed differential signal lines, 2012 indicates the 2.0 x 1.2mm footprint, 121 denotes 120 Ohm common-mode impedance at 100MHz, 2P indicates 2-line (differential pair), T indicates tape packaging, and 002 is the packaging code (2000 pcs\/reel). Despite its small size, the wirewound ferrite core construction provides 120 Ohm typical common-mode impedance at 100MHz (90 Ohm minimum), effectively suppressing common-mode noise on high-speed differential interfaces. The differential-mode impedance is kept low to avoid signal degradation. The 370mA rated current and 220mOhm maximum DCR make it suitable for USB 2.0 and similar interfaces. The 50VDC rated voltage and 10MOhm insulation resistance ensure reliable operation in typical digital signal environments. TDK recommends MCZ1210AH900L2TA0G as a replacement for new designs since this part is NRND.","working_principle":"The ACM2012-121-2P-T002 operates through magnetic coupling between two wirewound windings on a shared ferrite core: (1) Common-Mode Rejection: When common-mode noise currents flow in the same direction through both windings, the magnetic fields generated by each winding add together in the ferrite core. This creates a high impedance (120 Ohm at 100MHz) that blocks common-mode noise from propagating along the differential pair, converting the noise energy into heat in the ferrite core. (2) Differential-Mode Pass-Through: When the desired differential signal currents flow in opposite directions through the two windings, their magnetic fields cancel in the core, resulting in very low differential-mode impedance. This allows high-speed differential signals (USB, HDMI, LVDS) to pass through with minimal attenuation and signal integrity degradation. (3) EMI Suppression: Common-mode noise, which is the primary source of radiated EMI from cables and PCB traces, is suppressed at the source. The 120 Ohm impedance at 100MHz provides significant attenuation of common-mode noise in the frequency range where most digital EMI issues occur. (4) High-Frequency Performance: The wirewound construction and ferrite core material are optimized for stable impedance characteristics across a wide frequency range, making the filter effective for various high-speed protocols.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>Line 1 IN<\/td>Passive<\/td>Differential signal 1 input (source side)<\/td><\/tr>
      2<\/td>Line 2 IN<\/td>Passive<\/td>Differential signal 2 input (source side)<\/td><\/tr>
      3<\/td>Line 1 OUT<\/td>Passive<\/td>Differential signal 1 output (load side)<\/td><\/tr>
      4<\/td>Line 2 OUT<\/td>Passive<\/td>Differential signal 2 output (load side)<\/td><\/tr><\/table>","application_scenarios":"
      • USB 2.0 D+\/D- differential pair common-mode noise filtering with 120 Ohm impedance and 370mA current rating<\/li>
      • HDMI high-speed TMDS channel EMI suppression using 0805 compact footprint on dense PCB layouts<\/li>
      • LVDS display panel link noise filtering preserving signal integrity with low differential-mode impedance<\/li>
      • IEEE 1394 FireWire signal line common-mode suppression with 50VDC rated voltage isolation<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Zcm<\/th>Current<\/th>Notes<\/th><\/tr>
        MCZ1210AH900L2TA0G<\/td>TDK<\/td>90 Ohm<\/td>400mA<\/td>TDK recommended replacement<\/td><\/tr>
        DLW21SN121SQ2L<\/td>Murata<\/td>120 Ohm<\/td>300mA<\/td>0805, similar spec<\/td><\/tr>
        ACM2012-900-2P-T002<\/td>TDK<\/td>90 Ohm<\/td>400mA<\/td>Lower impedance, higher current<\/td><\/tr>
        DLW21SH101SQ2L<\/td>Murata<\/td>100 Ohm<\/td>350mA<\/td>0805, similar performance<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5460","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=5460"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5460\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=5460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=5460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=5460"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=5460"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}