Off Center Fed (OCF) Antennas

Solar RFI/Noise Filter - 1" ID

SKU SNF-1
$19.50
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Solar RFI/Noise Filter - 1" ID
Product Details
Initial Permeability (@ 10KHz): 1500
Material: MnZn
Max cable size - in/mm: 1.0/25.4
OD (A) - in/mm: 2.22/56.4
ID (B) - in/mm: 1.02/25.9
Length (C) - in/mm: 1.69/41.9
Z (ohms per bead - single turn 1 MHz): 45
Z (ohms per bead - single turn 5 MHz): 90
Z (ohms per bead - single turn 10 MHz): 125
Z (ohms per bead - single turn 25 MHz): 218
Z (ohms per bead - single turn 100 MHz): 375
Z ohms (per bead - single turn 250 MHz): 340
Case/Box lot size: 36

Ferric snap on bead filter effective over frequency ranges specific to solar installations including PV solar arrays, inverters, optimizers, combiners and network related control devices.

Effectively suppresses Radio Frequency Interference under 300 MHz. Use for solar installations of AC, DC, data and Ethernet cables for reducing common mode currents creating interference in electronic devices.


Very useful for AC/DC power, coax cable, etc. Use multiple turns for best results or multiple chokes in series (recommended for large amperage power cables). Always put +/- dc cables through the same ferrite filter so their fields cancel and the ferrite suppresses the common mode current on each cable.

THE RFI KIT FILTERS ONLY SUPPRESS COMMON MODE CURRENT (SIGNALS) THAT ARE COMMON TO ALL WIRES IN THE CABLE, AND DOES NOT EFFECT INDIVIDUAL DIFFERENTIAL SIGNALS ON EACH WIRE. THE FILTERS HAVE NO EFFECT ON THE NORMAL SIGNALS CARRIED WITHIN THE CABLE.

OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,