Signal-line common-mode choke for automotive and industrial busses
The TDK ACT1210D-510-2P-TL00 is a two-line common-mode filter from the ACT1210 series, packaged in a horizontal 4-pad SMD footprint. It delivers 2.3 kOhms impedance at 10 MHz, the frequency band where conducted emissions from switching converters and data lines typically peak. Rated for 115 mA per line at 80 VDC, this filter suits signal lines on a 48 V automotive bus, a 24 V industrial rail, or a 12 V CAN/FlexRay pair where the common-mode choke must survive load-dump transients.
AEC-Q200 and 150 °C — the automotive deployment envelope
AEC-Q200 qualification means this filter passed the automotive passive-component stress tests: thermal shock, moisture resistance, mechanical shock, and vibration. The -40°C to 150°C operating range covers under-hood and engine-bay locations where the ambient temperature exceeds the 125 °C typical of cabin-grade parts. The 50 µH inductance at 100 kHz and 3 Ohm max DCR per line define the low-frequency common-mode attenuation floor and the resistive voltage drop. At 115 mA, the 3 Ohm DCR drops 345 mV — budget this into the receiver's common-mode range.