B82451L4664E402

Rfid Antennas Overview

The B82451L4664E402 is a Z-axis transponder coil designed for passive entry passive start (PEPS) automotive keyless access systems. It features an ultra-compact footprint of 7.7 mm x 7.4 mm and a low profile height of 2.65 mm. The component operates at a frequency of 125 kHz with an inductance range spanning 1 mH to 10 mH across the series, offering sensitivity between 7 mV/µT and 23 mV/µT. It achieves a quality factor (Q) ranging from 50 to 58. The device is constructed using injection-molded substrate technology with laser-welded windings.

Rfid Antennas Feature Summary

• Ultra-compact Z-axis design enabling minimal PCB space consumption
• Injection-molded substrate construction ensuring high durability
• Laser-welded winding connections for reliable performance
• AEC-Q200 qualified for automotive environmental standards

Rfid Antennas Applications

• Passive Entry Passive Start (PEPS) systems
• Automotive keyless access control
• Low-frequency identification antennas

Rfid Antennas Procurement Notes

Verify the specific part number suffix against official TDK documentation to confirm exact electrical characteristics, as the series includes multiple variants with differing inductance and sensitivity values. Ensure compatibility with existing PEPS circuit designs regarding spatial constraints and mounting orientation. Confirm RoHS compliance status through current manufacturer declarations.

Rfid Antennas Selection Notes

Select this component when designing for tight spatial constraints within vehicle door handles or key fobs. The Z-axis orientation allows integration alongside X and Y axis coils to form complete three-dimensional detection arrays. Consider the specific sensitivity requirements of the application to choose the appropriate variant within the B82451L series that meets the necessary signal strength thresholds.

Rfid Antennas Part Context

This component belongs to the EPCOS B82451L series of transponder coils, now manufactured under the TDK Electronics brand following the corporate merger. The series provides modular solutions for automotive access systems, allowing designers to combine different axis orientations for optimized coverage. These coils are specifically engineered for robustness in harsh automotive environments while maintaining high signal integrity.

Rfid Antennas Replacement Considerations

Direct substitutes within the same family include other B82451L*E402 variants such as B82451L1004E402 or B82451L2364E402, depending on required inductance and sensitivity. Verify mechanical compatibility and electrical parameters before substitution. Cross-reference with updated TDK ordering codes to ensure availability and correct specifications.