© 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

Ω

Ω

Ω

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