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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Maximum DC Current
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Murata Electronics Ferrite Beads
Datasheet
43,000In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 15,000

BLM02xX_SN Ferrite Beads SMD/SMT 1005 (0402 metric) 18 Ohms 1.2 A 25 % 45 mOhms - 55 C + 125 C 0.4 mm 0.2 mm 0.2 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 30 OHM Alternate Sizing Guide Below
Datasheet
87,478In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 30 Ohms 6 A 25 % 10 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 600 OHM Alternate Sizing Guide Below
Datasheet
4,25,248In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 600 Ohms 2.3 A 25 % 60 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 600 OHM 25% Alternate Sizing Guide Below
Datasheet
7,56,122In Stock
5,20,000Expected 08-10-2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 600 Ohms 1.3 A 25 % 150 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.8 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 1000 OHM Alternate Sizing Guide Below
Datasheet
1,83,558In Stock
1,40,000Expected 24-11-2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 1 kOhms 1 A 25 % - 55 C + 125 C 1.6 mm 0.8 mm 0.8 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 220 OHM 25% Alternate Sizing Guide Below
Datasheet
4,66,351In Stock
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 470 OHM 25% Alternate Sizing Guide Below
Datasheet
1,19,231In Stock
1,20,000Expected 08-10-2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 470 Ohms 1.5 A 25 % 130 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.8 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 22 OHM Alternate Sizing Guide Below
Datasheet
44,424In Stock
96,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 22 Ohms 6 A 25 % 8 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.8 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 330 OHM Alternate Sizing Guide Below
Datasheet
24,397In Stock
56,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 330 Ohms 2.8 A 25 % 40 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 1000 OHM Alternate Sizing Guide Below
Datasheet
1,56,432In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 1 kOhms 1.6 A 25 % 120 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 110 OHM Alternate Sizing Guide Below
Datasheet
36,130In Stock
2,16,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 110 Ohms 5 A 25 % 13 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 50 OHM 12A Alternate Sizing Guide Below
Datasheet
17,996In Stock
3,38,910On 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 120 OHM Alternate Sizing Guide Below
Datasheet
21,817In Stock
20,000Expected 27-11-2026
MouseReel Available
Min.: 1
Mult.: 1
: 10,000

BLM15_SN Ferrite Chip Beads SMD/SMT 0402 (1005 metric) 120 Ohms 1.5 A 25 % 70 mOhms - 55 C + 125 C 1 mm 0.5 mm 0.5 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 20 OHM Alternate Sizing Guide Below
Datasheet
63,124In Stock
1,10,000Expected 01-12-2026
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 FB SMD 0603inch 100o hm NONAUTO Alternate Sizing Guide Below
Datasheet
14,866In Stock
12,000Expected 12-10-2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 100 Ohms 3.7 A 25 % 26 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads FB SMD 0603inch 220o hm NONAUTO Alternate Sizing Guide Below
Datasheet
10,535In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 220 Ohms 2.8 A 25 % 48 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 70 OHM Alternate Sizing Guide Below
Datasheet
2,857In Stock
20,000On Order
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 1000 OHM Alternate Sizing Guide Below
Datasheet
925In Stock
48,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 1 kOhms 1.2 A 25 % 222 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads Chip Ferrite 0805, 4mOhms Res, 30Ohms Imp, 8.5A
Datasheet
78In Stock
2,79,700On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 30 Ohms 8.5 A 4 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 470 OHM Alternate Sizing Guide Below
Datasheet
9,475In Stock
32,000Expected 12-10-2026
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM21_xN Ferrite Chip Beads SMD/SMT 0805 (2012 metric) 470 Ohms 2.5 A 25 % 50 mOhms - 55 C + 125 C 2 mm 1.25 mm 0.85 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 1000 OHM 2A Alternate Sizing Guide Below
Datasheet
94In Stock
1,87,500On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

BLM31KN_SN Ferrite Chip Beads SMD/SMT 1206 (3216 metric) 1 kOhms 2 A 25 % 75 mOhms - 55 C + 125 C 3.2 mm 1.6 mm 1.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 270 OHM 4.5A Alternate Sizing Guide Below
Datasheet
2,96,956On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

BLM31KN_SN Ferrite Chip Beads SMD/SMT 1206 (3216 metric) 270 Ohms 4.5 A 25 % 16 mOhms - 55 C + 125 C 3.2 mm 1.6 mm 1.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 470 OHM Alternate Sizing Guide Below
Datasheet
2,65,898On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

BLM31KN_SN Ferrite Chip Beads SMD/SMT 1206 (3216 metric) 470 Ohms 4 A 25 % 20 mOhms - 55 C + 125 C 3.2 mm 1.6 mm 1.6 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 330 OHM 25% Alternate Sizing Guide Below
Datasheet
2,16,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 330 Ohms 1.7 A 25 % 80 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.8 mm Reel, Cut Tape, MouseReel
Murata Electronics Ferrite Beads 33 OHM Alternate Sizing Guide Below
Datasheet
87,232On Order
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

BLM18_xN Ferrite Chip Beads SMD/SMT 0603 (1608 metric) 33 Ohms 6 A 25 % 8 mOhms - 55 C + 125 C 1.6 mm 0.8 mm 0.8 mm Reel, Cut Tape, MouseReel