TC4-1T SMD RF Balun Transformer 0.5–300MHz 1:4 Impedance
TC4-1T SMD RF Balun Transformer 0.5–300MHz 1:4 Impedance
TC4-1T SMD RF Balun Transformer — Wideband 0.5–300 MHz
Upgrade your RF circuit builds with the TC4-1T Surface-Mount Balun Transformer. Engineered for wideband operation from 0.5 MHz to 300 MHz, this compact SMD component delivers a precise 1:4 impedance transformation from balanced to unbalanced signals, making it an essential building block for antenna feedlines, RF amplifiers, software-defined radio (SDR) setups, and amateur radio projects.
Key Features
- Wideband Coverage: 0.5 MHz – 300 MHz for versatile RF applications
- 1:4 Impedance Ratio: Balanced-to-unbalanced (balun) transformation for clean signal integrity
- Excellent Return Loss: Minimizes signal reflections for efficient power transfer
- Flux-Coupled Design: CT (center-tap) flux-coupled construction for reliable performance
- SMD Package: Compact plastic body with leads — dimensions: 5 × 4 × 3 mm
- RF Power Rating: 0.25 W
- Max DC Current: 30 mA
- Operating Temperature: -20°C to +85°C
- Package Options: Available in 2-piece or 5-piece quantities so you can stock up for projects
Who Is This For?
Whether you're a hobbyist building your first SDR receiver, an electronics engineer prototyping an RF front-end, or an amateur radio enthusiast optimizing antenna performance, the TC4-1T balun transformer provides a reliable, space-saving solution for impedance matching challenges across a wide frequency range.
Specifications at a Glance
| Model | TC4-1T |
| Type | SMD RF Balun Transformer |
| Frequency Range | 0.5 – 300 MHz |
| Impedance Ratio | 1:4 |
| RF Power | 0.25 W |
| DC Current (max) | 30 mA |
| Operating Temperature | -20°C to 85°C |
| Dimensions | 5 × 4 × 3 mm |
| Package Quantity | 2 or 5 pieces |
Note: Colors may vary slightly from images due to monitor display differences.
For more information on RF component standards and electromagnetic compatibility, visit the NIST Electronics & Electromagnetics resource.
Frequently Asked Questions
Q: What does a balun transformer like the TC4-1T SMD do in an RF circuit?
A: A balun transformer converts signals between balanced (differential) and unbalanced (single-ended) configurations while simultaneously performing impedance transformation. The TC4-1T provides a 1:4 impedance ratio across a wideband range of 0.5–300 MHz, making it ideal for antenna matching networks, RF amplifier stages, SDR receivers, and amateur radio equipment where signal integrity and impedance matching are critical.
Q: What is the difference between a 1:4 and a 1:1 balun transformer?
A: A 1:1 balun simply converts between balanced and unbalanced signals without changing impedance — useful when both sides of a circuit share the same impedance (e.g., 50Ω to 50Ω). A 1:4 balun, like the TC4-1T, transforms impedance by a factor of four (e.g., 50Ω unbalanced to 200Ω balanced), which is essential for antenna systems and RF circuits where source and load impedances differ.
Q: Is the TC4-1T compatible with SDR (Software Defined Radio) applications?
A: Yes. The TC4-1T's wideband 0.5–300 MHz frequency range and 1:4 impedance transformation make it well-suited for SDR front-end designs, antenna splitters, and low-noise amplifier (LNA) input matching circuits. Its compact SMD form factor is easy to integrate onto custom PCBs and prototype boards.
Q: How many pieces are included in the package?
A: This listing is available in your choice of a 2-piece or 5-piece package, so you can grab just what you need for a single build or stock up for multiple projects.