TMO-4-1+

Product Overview

TMO-4-1+ is a Mini-Circuits hermetic plug-in 1:4 core-and-wire RF transformer specified for 0.2 MHz to 350 MHz. The 1:4 ratio provides a large impedance step while retaining transformer isolation and balanced/unbalanced conversion.

Its frequency range covers lower IF, HF, VHF and part of the lower-UHF spectrum, while the hermetic case is suited to military and high-reliability assemblies. This model is a plug-in component rather than an SMD transformer, so lead pattern, height and case grounding must match the existing board.

Key Features

• Manufacturer: Mini-Circuits
• Part Number: TMO-4-1+
• Product Category: RF Balun / RF Transformer
• Device Type: hermetic plug-in 1:4 core-and-wire RF transformer
• Frequency Range: 0.2 MHz to 350 MHz
• System / Port Impedance: 50 Ω system
• Impedance Ratio: 1:4
• Insertion Loss: Insertion loss referenced to 0.5 dB typical mid-band loss
• RF Power: 0.25 W
• DC Current: 30 mA
• Package / Case: Hermetic plug-in case
• Mounting Type: Through-hole / plug-in

Applications

• Military and high-reliability RF equipment
• HF/VHF impedance matching and balanced amplifier coupling
• Legacy instrumentation and receiver assemblies

Quality & Sourcing

Antrex Electronics can support sourcing of TMO-4-1+ 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.