B82453C Series 3D Transponder Coils TDK B82453C Series 3D Transponder Coils offer a long receiving distance at 125kHz and high sensitivity in all orientations (X/Y/Z). These coils feature a special core geometry, laser-welded construction, high thermal class wire, and a ferrite core with stability in temperature. The TDK B82453C series is AEC-Q200 qualified and RoHS compatible. The 3D transponder coils are suitable for pick-and-place and automatic optical inspection (AOI) as well as suitable for lead-free reflow soldering as referenced in JEDEC J-STD 020E.