B82451L4814E402

Rfid Antennas Overview

The B82451L4814E402 is a Z-axis transponder coil from the EPCOS (TDK) series, designed for Passive Entry Passive Start (PEPS) automotive keyless entry systems. It features an ultra-compact footprint of 7.7 mm x 7.4 mm with a low insertion height of 2.65 mm. The component has an inductance of 4.81 mH and operates at a frequency of 125 kHz. It achieves a sensitivity of 7 mV/µT to 23 mV/µT and maintains a quality factor (Q) between 50 and 58. The device is AEC-Q200 qualified and RoHS compliant.

Rfid Antennas Feature Summary

• Ultra-compact Z-axis design with molded baseboard and laser-welded windings for high durability
• AEC-Q200 qualified for automotive-grade reliability
• Compatible with X and Y axis transponder coils for flexible PCB layout

Rfid Antennas Applications

• Passive Entry Passive Start (PEPS) systems
• Automotive keyless entry systems
• Vehicle access control modules

Rfid Antennas Procurement Notes

Verify the specific suffix E402 to confirm package and tolerance specifications. Ensure compatibility with existing PEPS antenna designs requiring Z-axis orientation. Confirm AEC-Q200 certification status for automotive integration requirements. Check RoHS compliance documentation for environmental regulations. Validate inductance value against system tuning parameters.

Rfid Antennas Selection Notes

Select this component for applications requiring minimal PCB area due to its small 7.7 mm x 7.4 mm footprint. Choose based on the need for Z-axis signal detection in combination with X and Y axis coils. Consider the 4.81 mH inductance for 125 kHz operation. Evaluate the Q factor range for sensitivity requirements. Ensure the low profile fits within tight housing constraints.

Rfid Antennas Part Context

This part belongs to the B82451L*E402 series of Z-axis transponder coils. The series includes seven variants with inductances ranging from 1 mH to 10 mH. These components are engineered to complement the B82450A X and Y axis coil series, enabling compact three-coil solutions that save significant PCB space in modern vehicle access systems.

Rfid Antennas Replacement Considerations

Check TDK official announcements regarding brand transitions from EPCOS to TDK Electronics. Verify if alternative part numbers within the same B82451L series offer identical electrical characteristics. Confirm mechanical compatibility before substituting with other Z-axis coils.