T2-1T-KK81+

Product Overview

T2-1T-KK81+ is a 1:2 transformer for 70 kHz to 200 MHz supplied in the KK81 six-lead surface-mount package. It combines balanced/unbalanced conversion with an impedance step that is commonly used between 50 Ω circuitry and higher-impedance balanced mixer or amplifier ports.

Published typical data shows insertion loss and return loss changing across the very wide operating range, so the intended center frequency should be checked against the performance curves rather than judged from the endpoint bandwidth alone. The part is rated for 0.25 W and 30 mA DC through the winding.

Key Features

• Manufacturer: Mini-Circuits
• Part Number: T2-1T-KK81+
• Product Category: RF Balun / RF Transformer
• Device Type: KK81-packaged 1:2 core-and-wire RF transformer
• Frequency Range: 0.07 MHz to 200 MHz
• System / Port Impedance: 50 Ω
• Impedance Ratio: 1:2
• Insertion Loss: Typical measured range approximately 0.42 dB to 2.74 dB
• Return Loss: Typical measured range approximately 5.10 dB to 20.44 dB
• RF Power: 0.25 W
• DC Current: 30 mA DC
• Package / Case: KK81, 6-SMD gull-wing
• Mounting Type: Surface mount
• Operating Temperature: -20°C to +85°C

Applications

• Broadband IF and VHF matching stages
• Transformer-coupled push-pull amplifiers
• Balanced mixer interfaces requiring a 1:2 impedance ratio

Quality & Sourcing

Antrex Electronics can assist with sourcing T2-1T-KK81+ for legacy and current RF assemblies. Transformer substitutions should match the winding ratio, operating band, power/current limits, pin configuration and package footprint.