EPCOS z-axis transponder coils. Source: TDK.
TDK Corporation has unveiled a series of EPCOS z-axis transponder coils for passive entry, passive start (PEPS) car access systems. With dimensions of just 7.7 mm × 7.4 mm × 2.65 mm, the components are extremely compact and feature a very low insertion height. The B82451L*E402 series comprises seven transponder coils covering an inductance range from 1.0 mH to 10.0 mH.
Depending on the type, the transponder coils feature a sensitivity of between 7 mV/µT and 23 mV/µT at 125 kHz. The Q factor of the new components is between 50 and 58.
The injection-molded plastic baseplate and laser-welded connections of the winding ensure that the Z transponder coils are extremely robust. The components are also qualified according to AEC-Q200.
Moreover the Z transponder coils can be combined very well with the EPCOS B82450A*A* and B82450A*E* transponder coil series for the x and y axes. With footprints of just 11.4 mm × 3.5 mm and 8 mm × 2.7 mm, respectively, these components are also very compact. Solutions using three discrete transponder coils offer high flexibility of design and can save space on the PCB. A design combining the new Z transponder coil with two 8-mm X and Y transponder coils, for example, needs an area of just 100 mm².
All EPCOS transponder coils are RoHS compatible.
