Power Supply Line Noise Suppression for Home Audio

Digital amplifiers are increasingly popular for home audio applications. In many cases, power is supplied from an AC outlet for home audio, and the conductive noise in the power supply cable is regulated under EMC standards. Therefore, it is necessary to prevent noise from leaking into the power supply line during audio playback. Here is an overview of noise problems in home audio cables and their solutions.

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Qty. RoHS ECAD Model Series
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Murata Electronics Ferrite Beads 70 OHM Alternate Sizing Guide Below
Datasheet
9,517In Stock
8,000Expected 27/07/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 70 Ohms 6 A 25 % 9 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 120 OHM Alternate Sizing Guide Below
Datasheet
10,366In Stock
74,310On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

BLM31KN_SN Ferrite Chip Beads SMD/SMT 1206 (3216 metric) 120 Ohms 6 A 25 % 9 mOhms - 55 C + 125 C 3.2 mm 1.6 mm 1.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 50 OHM 12A Alternate Sizing Guide Below
Datasheet
9,986In Stock
149,100On Order
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

BLM31_SN Ferrite Beads SMD/SMT 1206 (3216 metric) 50 Ohms 12 A 25 % 1.6 mOhms - 55 C + 125 C 3.2 mm 1.6 mm 1.1 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 20 OHM Alternate Sizing Guide Below
Datasheet
29In Stock
90,000Expected 27/08/2026
MouseReel Available
Min.: 1
Mult.: 1
: 10,000

BLM15_SN Ferrite Beads SMD/SMT 0402 (1005 metric) 20 Ohms 3.8 A 25 % 11 mOhms - 55 C + 125 C 1 mm 0.5 mm 0.5 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 220 OHM 25% Alternate Sizing Guide Below
Datasheet
293,771Expected 04/06/2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 220 Ohms 2.2 A 25 % 50 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.8 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 180 OHM 25%
Datasheet
27,479On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 180 Ohms 4 A 25 % 20 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads
Datasheet
Non-Stocked Lead-Time 8 Weeks
MouseReel Available
Min.: 1
Mult.: 1
: 15,000

BLM02xX_SN Ferrite Beads SMD/SMT 1005 (0402 metric) 10 Ohms 1.5 A 5 Ohms 30 mOhms - 55 C + 125 C 0.4 mm 0.2 mm 0.2 mm Reel, Cut Tape, MouseReel