55438-A2 (Magnetics)

Toroidal ferromagnetic core (ferrite)  46.7 x 24.1 x 18mm (1.84" x 0.95" x 0.71") with gray-epoxy coating.

Permeability: 125

AL Value: 281

OEM Number: 55438-A2 /7 (alias: CO55438A2)

DataSheet: http://www.casa.co.nz/materials/Ferrites/

Other #: A-438281-2 (Arnold)

Other #: CM-467125 (Chang Sung)

Other #: T184-38 (Micrometals)

NSN #: TBA

Construct: powder-core toroidal with grey epoxy coating (in plastic bag)

* NOTE - A Ferrite bead or toroidal-ring may form the core for a choke or transformer and/or when placed onto a current carrying conductor, acts as an RF choke. It offers a convenient, inexpensive, yet a very effective means of RF shielding, parasitic suppression and RF decoupling. Typical toroidal cores are convenient to use for switch-mode choke, general electrical 'noise' suppression of cables in systems where RF signals can cause unwanted interference.