TDK has released new EPCOS SMT transponder coils with extremely compact dimensions. Measuring just 4,5 x 3,2 x 3,2 mm, the TC1812 has an inductance of 2,38 mH and is designed for operation in the Z-axis. The TC1210 coil is available with an inductance value of 1,08 mH or 1,34 mH, depending on type, and is suitable for operation in either the X- or Y-axis. Both TC1210 versions are said to be the smallest transponder coils in the world as they measure just 3,2 x 2,5 x 2,2 mm.
Thanks to their reduced dimensions, it was also possible to reduce the mass of the components by about a third compared to their predecessors. For example, the TC1210 (B82450A1084C000) weighs just 50 mg, while the TC1812 (B82451A2384D000) weighs only 120 mg. This makes them an excellent choice for tyre pressure monitoring systems (TPMS). These applications demand especially robust, low-mass components due to the high acceleration forces that are encountered. The terminals of the windings are laser-welded and provide high mechanical stability.
The TC1210 has a high sensitivity of 3,1 mV/μT or 3,5 mV/μT, depending on the type, while the TC1812 offers a sensitivity of 7,6 mV/μT. They are all designed for a centre frequency of 125 kHz, comply with the AEC-Q200 standard and are RoHS compatible.
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