748421245

Balun Overview

The Würth Elektronik 748421245 is a surface-mount RF balun transformer designed for the 2.4GHz to 2.5GHz frequency range, belonging to the WE-BAL series. It provides impedance transformation between 50 ohms unbalanced and 100 ohms balanced configurations. The component features a maximum insertion loss of 1.0dB and a phase difference of 180° ±10°. Packaged in an 0805 (2012 Metric) footprint, it supports standard reel, cut tape, and Digi-Reel packaging options.

Balun Feature Summary

• Provides impedance conversion between 50-ohm unbalanced and 100-ohm balanced lines
• Engineered specifically for 2.4GHz to 2.5GHz wireless communication bands
• Maintains a 180-degree phase difference with low insertion loss characteristics

Balun Applications

• Bluetooth module antenna interface circuits
• Zigbee transceiver signal path matching
• Wi-Fi 802.11 b/g/n front-end integration

Balun Procurement Notes

Verify the specific ordering suffix to confirm the required packaging format, such as standard tape and reel, cut tape, or Digi-Reel, as these affect handling procedures. Ensure the procurement documentation explicitly references the WE-BAL series designation to distinguish this component from other Würth baluns. Confirm RoHS compliance status through official manufacturer channels prior to finalizing supply agreements.

Balun Selection Notes

Select this component when designing circuits requiring a compact solution for 2.4GHz ISM band applications. The 0805 package size suits space-constrained PCB layouts. Engineers must verify that the 100-ohm balanced port matches the antenna or filter input impedance requirements. Consider the 1.0dB insertion loss budget when calculating total link margin for sensitive receiver paths.

Balun Part Context

This part belongs to the Würth Elektronik WE-BAL series of chip baluns. These components are engineered to replace discrete transformer implementations in modern RF designs. The series offers various impedance ratios and frequency ranges tailored for wireless standards. The 748421245 specifically addresses the common 50-to-100 ohm requirement found in many dual-band radio architectures.

Balun Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.