TCM9-1+

Balun Overview

The TCM9-1+ is a surface-mount RF balun transformer manufactured by Mini-Circuits. It operates within a frequency range of 2 MHz to 280 MHz, providing an impedance ratio of 1:9. The device features single-channel architecture with primary and secondary coil impedances of 50 Ohms each. It supports a maximum DC current of 30 mA and has a power rating of 250 mW. The component functions reliably between -20°C and +85°C. Physical dimensions are 4.06 mm in length, 3.81 mm in width, and 4.06 mm in height. Insertion loss ranges from 0.82 dB to 2.11 dB, while return loss varies between 6.95 dB and 15.35 dB.

Balun Feature Summary

• Converts unbalanced signals to balanced signals using a center-tapped configuration
• Provides high isolation between ports for signal integrity
• Designed for surface mount assembly on printed circuit boards

Balun Applications

• RF front-end circuits requiring impedance transformation
• Antenna feed networks for balanced loads
• Signal distribution systems in telecommunications equipment

Balun Procurement Notes

Verify the specific suffix designation to ensure compliance with RoHS standards and confirm the exact package variant matches the required footprint. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity. Confirm that the operating temperature range aligns with the environmental conditions of the target application before finalizing procurement orders.

Balun Selection Notes

Select this component when a 1:9 impedance transformation is required for frequencies up to 280 MHz. Ensure the system can accommodate the specified insertion loss and return loss characteristics. Verify that the physical dimensions fit within the available board space constraints. Confirm that the maximum DC current and power ratings exceed the operational requirements of the circuit design.

Balun Part Context

This component belongs to the TCM9 series of RF transformers produced by Mini-Circuits. The series focuses on surface-mount solutions for broadband applications. The TCM9-1+ specifically addresses unbalanced-to-balanced conversion needs. It complements other Mini-Circuits components used in RF signal processing chains.

Balun Replacement Considerations

Direct substitutes include models such as TC4-25G2+, TCM4-25+, TCM4-19+, TC4-19LN+, TX4-62HP+, TCM4-452X+, TC4-25+, TCM3-452X+, TC4-19+, TCN2-14+, TCML1-11X+, TCN1-23+, TCN1-10+, TCN2-26+, TRS1-23-75+, TC4-19G2+, TCML1-19X+, TCN3-11+, TCN4-13+, TCML1-19+, TCML1-11+, TCM2-672X+, and TCL1-11+. Verify electrical parameters and pinout compatibility before substitution.