© KEMET Electronics Corporation, P.O. Box 5928, Greenville, SC 29606 (864) 963-6300
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BK Features:
• Internal silver printed layer creates a closed circuit which acts as a magnetic
shield to minimize heat generation and crosstalk
• No need for grounding provides greater circuit design flexibility
• Several material types and a broad range of impedance values provide noise
countermeasures for various applications
HS: Suppresses the XL component. Helps stop the reduction of the wave-form
integrity (digital wave-form overshoot, etc)
HM: Increases the Z characteristics sharply above 20MHz and is applicable for
radiated noise in the 100MHz-300MHz range. Especially effective on video
signal lines.
LL: Designed as a noise countermeasure for 200MHz-500MHz range where the
rise of the Z component is in the high frequency area.
LM: Intended for noise suppression around 200MHz. Effectively increase
attenuation
HW: The best material in the BK Series to suppress the XL component and stop the
reduction of the wave-form integrity while maintaining attenuation in the high
frequency area.
TS: Reduced DC resistance version for noise countermeasures around LSI power
supplies
BKP Features:
• Low Rdc values reduce power dissipation and extend battery life
• No need for grounding provides greater circuit design flexibility
KEMET Designator
Material
HM, HS, HW, LL, LM, TS
Contact KEMET for materials characteristics
Impedance
Examples: 150 = 15
ΩΩ
101 = 100
ΩΩ
102 = 1000
ΩΩ
Type
BK- = Standard, BKP = For Power Supply Lines
Case Size
0603 (0201)
1005 (0402)
1608 (0603)
2125 (0805)
Packaging Code
T = Tape & Reel
BK-
1005 HM 121 T K
Dim.
Code
EIA
Case
Size
L
Length
(inches)
W
Width
(inches)
T
Thickness Maximum
(inches)
E
(inches)
0603 0201
1.6 ±0.2
(0.063 ±0.008)
0.8 ±0.2
(0.031 ±0.008)
0.8 ±0.2
(0.031 ±0.008)
0.3 ±0.2
(0.012 ±0.008)
1005 0402
1.00 ±0.05
(0.039 ±0.002)
0.50 ±0.05
(0.020 ±0.002)
0.50 ±0.05
(0.020 ±0.002)
0.25 ±0.10
(0.010 ±0.004)
1608 0603
1.6 ±0.15
(0.063 ±0.006)
0.8 ±0.15
(0.031 ±0.006)
0.8 ±0.15
(0.031 ±0.006)
0.3 ±0.2
(0.012 ±0.008)
2125 0805
2.0 +0.3/-.01
(0.079 +0.012/-0.004)
1.25 ±0.2
(0.049 ±0.008)
0.85 ±0.2
(0.033 ±0.008)
0.5 ±0.3
(0.020 ±0.012)
Multilayer Ferrite Chip Beads - BK Series
Part Numbering Table
Dimension Table in millimeters (inches)
BK Applications:
• High frequency noise countermeasure in personal computers, digital cameras and
other information system products. For use on digital product clock lines and
general signal lines.
• Radiated noise suppression in computer or printer interfaces harness connectors.
• Noise suppression in video and other AV products
• Prevents interference between circuits in cellular phones (PHS, PDC, etc)
• Due to the closed internal circuit which acts as a magnetic shield, the TS material
is extremely effective as a noise filter on LSI power supplies where downsizing
of components is needed.
BKP Applications:
• High frequency noise countermeasures on the DC power supply line in personal
computers and other information system products
• Noise suppression in USB and IEEE1294 interface
• Prevents interference between circuits in mobile systems (PDC, PHS, PDA)
Operating Temperature:
• BK: -55ºC to +125ºC (includes self-generated heat)
• BKP: -55ºC to +85ºC (includes sel-generated heat)
E
T
W
L
