Fair-Rite 2661022401 抑制磁珠

 	
EMI Suppression Beads (2661022401)

　　Part Number: 2661022401

　　-->61 SHIELD BEAD

　　Higher Frequencies 250-1000 MHz (61 material)

　　Suppression Components

　　Board Component

　　Explanation of Part Numbers:

　　– Digits 1 & 2 = Product Class

　　– Digits 3 & 4 = Material Grade

　　– Last digit 1= Not Burnished 2 = Burnished

　　– The last digit of the Parylene coated part is a “4,” which is available upon request. The minimum coating thickness beads is 0.005 mm (0.0002″).

　　Fair-Rite offers a broad selection of ferrite EMI suppression beads with guaranteed minimum impedance specifications.

　　Our “Shield Bead Kit” (part number 0199000019) contains a selection of these beads.

　　+ Test frequency

　　? The column "H (Oe)" gives for each bead the calculated dc bias field in oersted for 1 turn and 1 ampere direct current. The actual dc H field in the application is this value of “H” times the actual NI (ampere-turn) product. For the effect of the dc bias on the impedance of the bead material, see figures 18-23 in the application note ?How to choose Ferrite Components for EMI Suppression?.
Typical Impedance (Ω)
100 MHz 58
250 MHz+ 82
500 MHz+ 103
1000 MHz 138
Electrical Properties
H(Oe) 1.5

　　Suppression beads are controlled for impedances only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is typically the listed impedance less 20%.

　　Single turn impedance tests for 73 and 43 material beads are performed on the 4193A Vector Impedance Analyzer. The 61 material beads are tested on the 4291A RF Impedance Analyzer. Beads are tested with the shortest practical wire length.
Typical Impendance (Ω)
100 MHz 58
250 MHz+ 82
500 MHz+ 103
1000 MHz 138