T1-1T-KK81+

Balun Overview

The T1-1T-KK81+ is a 1:1 core and wire transformer manufactured by Mini-Circuits, designed for RF signal conditioning applications. It operates within a frequency range of 0.08 to 200 MHz with a nominal impedance of 50 ohms. The component utilizes a surface-mount gull-wing package (KK81) with dimensions of 7.62 mm in length, 6.86 mm in width, and 5.84 mm in height. It supports a maximum current rating of 30 mA and a power rating of 250 mW. The device functions reliably across an operating temperature range from -20°C to +85°C.

Balun Feature Summary

• Provides balanced-to-balanced or unbalanced-to-balanced conversion via a 1:1 turns ratio
• Utilizes a compact surface-mount gull-wing lead configuration for automated assembly
• Engineered for stable performance across VHF and UHF frequency bands

Balun Applications

• VHF/UHF signal processing circuits
• RF balun implementation in communication systems
• Signal conditioning in test and measurement equipment

Balun Procurement Notes

Verify the specific suffix KK81+ to confirm the gull-wing surface mount package style, as other suffixes may indicate different lead configurations. Ensure the ordering quantity aligns with the manufacturer's standard reel or cut tape packaging requirements. Confirm that the application environment remains within the specified -20°C to +85°C operational temperature limits to maintain component integrity and electrical performance standards.

Balun Selection Notes

Select this component when a 1:1 impedance transformation is required between 80 kHz and 200 MHz. The choice depends on the need for a low-profile surface-mount solution compatible with standard PCB footprints. Consider the 30 mA current limit and 250 mW power rating to ensure the transformer does not saturate under expected signal loads. Verify that the 50-ohm system impedance matches the surrounding circuit design requirements.

Balun Part Context

This part belongs to the T1 series of core and wire transformers from Mini-Circuits, which are widely used for RF signal balancing. The T1-1T variant specifically denotes a 1:1 ratio configuration. The KK81 package style provides a standardized footprint for surface-mount technology, facilitating integration into modern electronic designs requiring reliable RF performance in compact form factors.

Balun Replacement Considerations

The T1-1-KK81+ offers a similar 1:1 configuration but operates from 0.15 to 400 MHz. The T1-1T-X65+ represents an alternative package style within the same functional family. Verify pin compatibility and impedance matching before substituting these parts.