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Product Detailed Parameters
- Description：CMC 400MA 2LN 90 OHM SMD
- Series：ACM
- Mfr：TDK Corporation
- Package：Tape & Reel (TR),Cut Tape (CT)
- Filter Type：Signal Line
- Number of Lines：2
- Current Rating (Max)：400mA
- DC Resistance (DCR) (Max)：190mOhm
- Voltage Rating - DC：50V
- Voltage Rating - AC：-
- Operating Temperature：-40°C ~ 85°C
- Ratings：-
- Approval Agency：-
- Features：-
- Mounting Type：Surface Mount
- Size / Dimension：0.079" L x 0.047" W (2.00mm x 1.20mm)
- Height (Max)：0.051" (1.30mm)
- Package / Case：Horizontal, 4 PC Pad
- Inductance @ Frequency：-
- Impedance @ Frequency：90 Ohms @ 100 MHz
- Qualification：-
- Grade：-
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Overview
The ACM2012-900-2P-T002 is a two-channel common mode filter from the TDK ACM series, designed for high-speed differential signal lines. It features a 90 Ohm impedance at 100 MHz and supports a maximum DC current of 400 mA. The component has a maximum DC resistance of 190 mOhms and an inductance of 340 nH. It operates within a temperature range of -40°C to +85°C (with some sources citing up to +105°C). The device utilizes a surface mount package with dimensions of 2.0 mm x 1.2 mm x 1.3 mm.
Feature Summary
- Achieves significant noise suppression for common mode interference while maintaining low differential mode impedance to preserve high-speed signal integrity.
- Utilizes a wound-type chip construction that provides substantial miniaturization compared to traditional common mode filters.
Applications
- USB cables for computers and peripheral devices
- IEEE1394 and ETHERNET lines for computers and STBs
- LVDS and Panel Link lines for liquid crystal screens
Procurement Notes
Verify the specific impedance value against the datasheet, as the model number indicates 90 Ohms but some listings reference 120 Ohms for similar variants. Confirm the operating temperature rating, as documentation varies between +85°C and +105°C. Ensure the package dimensions match the required PCB footprint of 2.0mm x 1.2mm. Check RoHS compliance status if required by your manufacturing standards.
Selection Notes
Select this component when filtering high-speed differential signals such as USB or Ethernet where minimal impact on the differential mode is critical. The 400 mA current rating suits general signal line applications rather than power lines. Consider the 0805 footprint constraints and verify compatibility with reflow soldering profiles specified in the official TDK documentation.
Part Context
This part belongs to the TDK ACM series of common mode chokes, which are engineered for signal line filtering. The series offers various impedance values and current ratings in compact surface-mount packages. The ACM2012 variant specifically targets space-constrained designs requiring effective EMI suppression for digital interfaces.
Replacement Considerations
Consult TDK's official substitution guide for equivalent parts within the ACM series. Verify that any substitute matches the 90 Ohm impedance at 100 MHz and the 400 mA current handling capability. Ensure physical dimensions and pin configurations are compatible with the existing PCB layout.
