3A412S

Balun Overview

The 3A412S is an RF balun transformer from the RJE72 series by TTM Technologies, Inc. It operates within a frequency range of 800MHz to 1GHz. The device provides impedance transformation between an unbalanced port of 50 ohms and a balanced port of 12.5 ohms. Key electrical specifications include a maximum insertion loss of 0.48dB, a minimum return loss of 15dB, and a phase difference of 180° ±5°. It is housed in a low-profile 3-SMD, no-lead surface-mount package.

Balun Feature Summary

• Provides 180-degree phase shift for differential signal processing
• Transforms 50-ohm unbalanced impedance to 12.5-ohm balanced impedance
• Designed specifically for push-pull amplifier configurations

Balun Applications

• Push-pull amplifier input/output matching
• AMPS cellular communication systems
• GSM mobile communication devices

Balun Procurement Notes

Verify the specific ordering suffix (e.g., STR for tape and reel, CT for cut tape) against the manufacturer's current datasheet to ensure correct packaging configuration. Confirm RoHS compliance status and MSL rating requirements for your assembly process before finalizing procurement orders.

Balun Selection Notes

Select this component when designing circuits requiring conversion between single-ended 50-ohm lines and differential 12.5-ohm loads. Ensure the operating frequency falls strictly within the 800MHz to 1GHz range. Consider the low-profile SMD footprint for space-constrained PCB layouts in wireless infrastructure.

Balun Part Context

This part belongs to the Xinger family of RF components manufactured by TTM Technologies, formerly Anaren. The Xinger line specializes in ceramic-filled PTFE composite transformers designed for high reliability and stability in demanding RF environments. This specific model targets mid-frequency power applications rather than millimeter-wave bands.

Balun Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.