B82451L4754E402

Rfid Antennas Overview

The B82451L4754E402 is a surface-mount Z-axis transponder coil designed for Passive Entry Passive Start (PEPS) automotive keyless entry systems. It belongs to the B82451L series, featuring compact dimensions of 7.7mm x 7.4mm x 2.65mm with low installation height. The component has an inductance of 4.75mH and operates at a frequency of 125kHz. It meets AEC-Q200 automotive qualification standards.

Rfid Antennas Feature Summary

• Z-axis orientation design for optimized magnetic field coupling in transponder applications
• Robust construction using terminal-embedded injection molding and laser-wound coils
• Automotive-grade reliability certified under AEC-Q200 standards
• Compact surface-mount package suitable for space-constrained PCB layouts

Rfid Antennas Applications

• Passive Entry Passive Start (PEPS) systems
• Automotive keyless entry antennas
• Vehicle immobilizer transponder circuits

Rfid Antennas Procurement Notes

Verify the specific ordering suffix E402 against official TDK documentation to confirm exact inductance tolerance and sensitivity specifications. Ensure compatibility with peak reflow temperature profiles defined in the datasheet. Confirm that the selected packaging format aligns with automated assembly requirements. Cross-reference the part number with the latest RoHS and REACH compliance status before finalizing procurement orders.

Rfid Antennas Selection Notes

Select this component when designing PEPS systems requiring a Z-axis coil configuration for specific antenna placement constraints. The 4.75mH inductance value must match the resonant circuit requirements of the 125kHz reader module. Consider the physical footprint of 7.7mm x 7.4mm for PCB routing efficiency. Verify that the operating temperature range covers the intended automotive environment conditions.

Rfid Antennas Part Context

This part is part of the EPCOS (now TDK Electronics) B82451L series of SMT inductors specifically engineered as Z-transponder coils. The series offers various inductance values ranging from 1mH to 10mH within the same compact form factor. These components are integral to modern vehicle security systems, providing reliable signal transmission between the key fob and the vehicle receiver unit.

Rfid Antennas Replacement Considerations

Consult the official TDK B82451LxE402 Series datasheet for direct substitute part numbers within the same family. Ensure any replacement maintains identical Z-axis orientation, mounting dimensions, and AEC-Q200 certification. Verify that alternative models offer compatible inductance and sensitivity parameters for the specific 125kHz application.