BN43-7051 Binocular Toroid for HF Linear Amplifier

BN43-7051 is a high-quality ferrite binocular core (also known as a “multi-aperture core”) used in radio frequency (RF) applications.

This core was specifically designed using Material 43, a Nickel-Zinc (NiZn) ferrite material that performs best in the medium frequency range.

Permeability (μ_i): 850
Frequency Range: Wideband Transformers: 5 MHz – 400 MHz
Power Transformers: 0.5 MHz – 30 MHz
RFI Suppression: 5 MHz – 500 MHz
- These ranges are listed differently by different sources!
Dimensions: Approximately 28.7mm x 28.7mm x 14.25mm.
Structure: Two parallel holes (binocular shape) with a diameter of roughly 6.35mm.

RF Baluns and Ununs: Often used in amateur radio (Ham radio) for constructing 1:1, 4:1, or 9:1 baluns.
Impedance Matching: Used in the output stages of solid-state RF power amplifiers (up to 200W-300W PEP depending on the design).
EMI/RFI Suppression: Used as a choke to snap onto cables or wind wires through to reduce electronic noise.