B82451L7804E402

Rfid Antennas Overview

The B82451L7804E402 is a surface-mount transponder coil manufactured by TDK under the EPCOS brand. Designed for automotive applications, this component operates at a frequency of 125 kHz and features an inductance value of 7.8 mH. It is qualified to the AEC-Q200 standard, ensuring reliability in harsh environments. The unit utilizes a molded plastic base with laser-welded connections for durability. Its physical dimensions are 7.7 mm x 7.4 mm x 2.65 mm, making it suitable for compact PCB layouts.

Rfid Antennas Feature Summary

• Ultra-small form factor designed for space-constrained automotive PCBs
• High sensitivity optimized for passive entry passive start systems
• Robust construction using molded plastic base and laser-welded connections
• Qualified to AEC-Q200 automotive grade standards

Rfid Antennas Applications

• Passive Entry Passive Start (PEPS) systems
• Automotive door access control
• Keyless entry modules
• Vehicle immobilizer antennas

Rfid Antennas Procurement Notes

Verify the specific suffix E402 matches the required RoHS compliance and packaging configuration. Confirm that the 7.8 mH inductance aligns with the target PEPS design requirements. Ensure the AEC-Q200 qualification status meets the specific vehicle manufacturer's quality standards before finalizing the supply chain agreement.

Rfid Antennas Selection Notes

Select this component when a low-profile antenna is required for Z-axis detection in PEPS architectures. Compare its 7.8 mH inductance against other series variants like 1.0 mH or 10 mH to ensure proper impedance matching. Consider the 7.7 mm x 7.4 mm footprint relative to available board space and verify compatibility with existing X and Y axis coils.

Rfid Antennas Part Context

This part belongs to the B82451L series of transponder coils, which are engineered specifically for automotive access systems. The series offers various inductance values ranging from 1.0 mH to 10 mH to support different design sensitivities. These components are designed to complement the B82450A series, allowing for flexible multi-axis antenna configurations within tight spatial constraints.

Rfid Antennas Replacement Considerations

Compatible substitutes within the same family include B82451L1004E402, B82451L2364E402, B82451L4664E402, B82451L4754E402, B82451L6804E402, and B82451L1005E402. Verify that alternative inductance values do not compromise the system's detection range or sensitivity requirements.