TC4-1T+

Balun Overview

The TC4-1T+ is a surface-mount RF transformer manufactured by Mini-Circuits, designed for broadband applications. It operates within a frequency range of 0.5 MHz to 300 MHz, with extended usability down to 0.2 MHz and up to 450 MHz. The component features a 1:4 impedance transformation ratio, matching both primary and secondary coils at 50 Ohms. It utilizes a 6-SMD (5 Leads) flat lead package measuring 3.8 mm x 3.8 mm. Key electrical specifications include a maximum insertion loss of 3 dB and a minimum return loss of 16.81 dB. The device supports a maximum DC current of 30 mA and has a power rating of 250 mW. It functions reliably within an operating temperature range of -20°C to +85°C.

Balun Feature Summary

• Provides broadband signal transformation across a wide frequency spectrum from 0.5 MHz to 300 MHz.
• Ensures efficient impedance matching between balanced and unbalanced circuits with a 1:4 ratio.
• Features low insertion loss and high return loss for minimal signal degradation.
• Constructed with a compact surface-mount design suitable for automated assembly.

Balun Applications

• Cable television systems
• RF signal transmission lines
• Balun converter circuits

Balun Procurement Notes

Verify the specific suffix designation when ordering, as variations such as TC4-1TX+ exist with identical core functionality but potentially different packaging configurations like cut tape or reel. Confirm RoHS compliance status and ensure the selected variant matches the required lead style for the target PCB footprint. Cross-reference official datasheets to validate that the procurement order aligns with the exact physical dimensions and pinout requirements of the design.

Balun Selection Notes

Select this component for designs requiring a compact, broadband solution for impedance conversion in the VHF/UHF range. The 1:4 ratio makes it suitable for driving 25-ohm loads from 50-ohm sources or vice versa. Consider the thermal limits and DC current constraints when integrating into high-power stages. The surface-mount form factor aids in reducing board space compared to through-hole alternatives while maintaining performance integrity.

Balun Part Context

This part belongs to the TC4 series of RF transformers from Mini-Circuits, a leader in RF, IF, and microwave components. The series is engineered for high-performance applications ranging from DC to microwave frequencies. The TC4-1T+ specifically addresses the need for reliable, small-footprint balancing components in modern electronic systems, supporting various signal processing tasks.

Balun Replacement Considerations

The TC4-1TX+ serves as a direct functional substitute, offering the same electrical specifications and 1:4 transformation ratio. Ensure compatibility regarding the mounting style, as the TX+ variant may utilize a hat-style configuration compared to the flat lead of the T+ version. Verify that the replacement meets all mechanical and environmental requirements of the original design.

Balun FAQ

What is the impedance transformation ratio of the TC4-1T+?

The TC4-1T+ provides a 1:4 impedance transformation ratio, matching 50 Ohm primary and secondary coils.

Does the TC4-1T+ support DC current?

Yes, the component can handle a maximum DC current of 30 mA.