TRS278-122-75+

Product Overview

TRS278-122-75+ is a Mini-Circuits 75 Ω 1:2.78 balanced core-and-wire RF transformer specified for 40 MHz to 1.25 GHz. The unusual 1:2.78 ratio is designed for a specific higher-impedance differential load rather than a conventional 1:2 matching point.

Its 40 MHz to 1.25 GHz band aligns with DOCSIS 3.1 and broadband distribution systems that must cover both return and forward paths. Because the ratio is non-standard, replacement approval must preserve the winding relationship as well as the 75 Ω characterization.

Key Features

• Manufacturer: Mini-Circuits
• Part Number: TRS278-122-75+
• Product Category: RF Balun / RF Transformer
• Device Type: 75 Ω 1:2.78 balanced core-and-wire RF transformer
• Frequency Range: 40 MHz to 1.25 GHz
• System / Port Impedance: 75 Ω system
• Impedance Ratio: 1:2.78
• Insertion Loss: 1.5 dB maximum
• Phase Balance / Unbalance: 7°
• Package / Case: 6-SMD module
• Mounting Type: Surface mount

Applications

• DOCSIS 3.1 and CATV broadband equipment
• 75 Ω push-pull amplifier and tuner stages
• Specialized 1:2.78 differential impedance matching

Quality & Sourcing

Antrex Electronics can support sourcing of TRS278-122-75+ for production, repair and shortage requirements. Incoming inspection should compare the exact ordering code, operating band, impedance relationship, package or connector configuration and any center-tap or suffix-specific mechanical details. Parts from the same transformer family may not be interchangeable when the ratio, port impedance, lead style or installed geometry changes.