維創(chuàng)域貿(mào)易有限公司蘇州分公司 徐先生 18051732733 051268755133 長期供應(yīng)Fair-Rite全系產(chǎn)品
視頻線等線材上，可有效屏蔽EMI/RFI干擾，隔離或?yàn)V除電源連接導(dǎo)線竄入設(shè)備電路的高頻噪聲脈沖干擾，如用在音視頻電器電源線上能進(jìn)一步提升音頻及視頻質(zhì)量，無疑是音響發(fā)燒友的選擇。用在音頻線，視頻線等各種發(fā)燒線材上，其增加音響系統(tǒng)純凈度，降低訊號(hào)線被電源線雜訊干擾.
磁環(huán)
電子設(shè)備輻射和泄漏的電磁波不僅嚴(yán)重干擾其他電子設(shè)備正常工作，導(dǎo)致設(shè)備功能紊亂、傳輸錯(cuò)誤、還威脅著人類的健康與安全，危害非常大。因此降低電子設(shè)備的電磁干擾(EMI)已經(jīng)是必須考慮的問題。
吸收磁環(huán)，又稱鐵氧體磁環(huán)，簡稱磁環(huán)。它是電子電路中常用的抗干擾元件，對(duì)于高頻噪聲有很好的抑制作用，一般使用鐵氧體材料（Mn－Zn）制成。
磁環(huán)在不同的頻率下有不同的阻抗特性，一般在低頻時(shí)阻抗很小，當(dāng)信號(hào)頻率升高磁環(huán)表現(xiàn)的阻抗急劇升高。
大家都知道，信號(hào)頻率越高，越容易輻射出去（要買優(yōu)質(zhì)的電腦機(jī)箱也是要減小電磁泄漏），而一般的信號(hào)線都是沒有屏蔽層的，那么這些信號(hào)線就成了很 好的天線，接收周圍環(huán)境中各種雜亂的高頻信號(hào)，而這些信號(hào)疊加在本來傳輸?shù)男盘?hào)上，甚至?xí)淖冊(cè)瓉韨鬏數(shù)挠杏眯盘?hào)。那么在磁環(huán)作用下，使正常有用的信號(hào)很好的通過，又能很好的抑制高頻干擾信號(hào)的通過，而且成本低廉。
所以大家在顯示器信號(hào)線，USB連接線，甚至高檔鍵盤、鼠標(biāo)上看的塑料疙瘩型的一體式磁環(huán)就不足為奇了。
磁環(huán)的匝數(shù)選擇
將整束電纜穿過一個(gè)鐵氧體磁環(huán)就構(gòu)成了一個(gè)共模扼流圈，根據(jù)需要，也可以將電纜在磁環(huán)上面繞幾匝。匝數(shù)越多，對(duì)頻率較低的干擾抑制效果越好，而對(duì)頻率較高的噪聲抑制作用較弱。在實(shí)際工程中，要根據(jù)干擾電流的頻率特點(diǎn)來調(diào)整磁環(huán)的匝數(shù)。通常當(dāng)干擾信號(hào)的頻帶較寬時(shí)，可在電纜上套兩個(gè)磁環(huán)，每個(gè)磁環(huán)繞不同的匝數(shù)，這樣可以同時(shí)抑制高頻干擾和低頻干擾。從共模扼流圈作用的機(jī)理上看，其阻抗越大，對(duì)干擾抑制效果越明顯。而共模扼流圈的阻抗來自共模電感Lcm=jwLcm，從公式中不難看出，對(duì)于一定頻率的噪聲，磁環(huán)的電感越大越好。但實(shí)際情況并非如此，因?yàn)閷?shí)際的磁環(huán)上還有寄生電容，它的存在方式是與電感并聯(lián)。當(dāng)遇到高頻干擾信號(hào)時(shí)，電容的容抗較小，將磁環(huán)的電感短路，從而使共模扼流圈失去作用
Item Brand Mftrs No Debion
1 FAIR RITE 199000005 Expanded Cable and Connector EMI Suppres
2 FAIR RITE 199000017 EMI SUPRESSION EVALUATION KITS
3 FAIR RITE 199000018 Product Debion:Fair-Rite Engineerin
4 FAIR RITE 199000034 EMI SUPRESSION EVALUATION KITS
5 FAIR RITE 199001401 EMI SUPRESSION EVALUATION KITS
6 FAIR RITE 431164181 31 SNAP-IT ROUND CABLE SUPPRESSION CORE
7 FAIR RITE 431164281 FERRITES IMPEDANCE:310OHMS; SIZE/DIMENSI
8 FAIR RITE 431164951 FERRITE CORE IMPEDANCE:280OHM; SIZE/DIME
9 FAIR RITE 431167281 Ferrites; Impedance: 240Ohms; Size/Dimen
10 FAIR RITE 431173551 Ferrites; Impedance: 220Ohms; Size/Dimen
11 FAIR RITE 443163951 EMI SUPRESSION CORES WITH CASES
12 FAIR RITE 443164151 Round Cable Snap-Its, Cable Diameter-.50
13 FAIR RITE 443164251 FERRITE ROUND CORE ((NW))
14 FAIR RITE 443167251 EMI SUPRESSION CORES WITH CASES
15 FAIR RITE 443625006 EMI SUPRESSION CORES WITH CASES
16 FAIR RITE 444164181 44 SNAP-IT ROUND CABLE SUPPRESSION CORE
17 FAIR RITE 444164281 44 SNAP-IT ROUND CABLE SUPPRESSION CORE
18 FAIR RITE 444164951 Round Cable Core, EMI Suppression, with
19 FAIR RITE 444167281 EMI SUPRESSION CORES WITH CASES
20 FAIR RITE 444173551 Ferrite Core Impedance:94Ohm
21 FAIR RITE 444176451 FERRITE CORE IMPEDANCE:175OHM
22 FAIR RITE 2631102002 ROUND CABLE EMI SUPPRESSION CORES
23 FAIR RITE 2631665702 Ferrite Core Impedance:225Ohm
24 FAIR RITE 2643000101 Ferrites; Impedance: 40Ohms; Resistance:
25 FAIR RITE 2643000801 Shield Bead, EMI, 92 ohm Impedance at 10
26 FAIR RITE 2643000801 Shield Bead, EMI, 92 ohm Impedance at 10
27 FAIR RITE 2643001501 Ferrites Resistance:35Ohms
28 FAIR RITE 2643021801 Ferrite Bead Resistance:131Ohm
29 FAIR RITE 2643102002 STATIC PROTECTION ((NW))
30 FAIR RITE 2643102402 43 EMI Suppression Bead
31 FAIR RITE 2643164251 43 SHIELD BEAD
32 FAIR RITE 2643166651 Flat cable EMI suppression core, (HxWxD
33 FAIR RITE 2643166851 Flat cable EMI suppression core, (HxWxD
34 FAIR RITE 2643167851 43 Flat Cable EMI Suppression Core
35 FAIR RITE 2643169552 43 Flat Cable EMI Suppression Core
36 FAIR RITE 2643375002 EMI SHIELD BEADS
37 FAIR RITE 2643480002 Round cable EMI suppression core, 1 in.
38 FAIR RITE 2643540002 ROUND CABLE EMI SUPPRESSION CORES
39 FAIR RITE 2643540402 43 Round Cable EMI Suppression Core
40 FAIR RITE 2643625002 Ferrite, E Core
41 FAIR RITE 2643625102 43 Round Cable EMI Suppression Core
42 FAIR RITE 2643626302 43 Round Cable EMI Suppression Core
43 FAIR RITE 2643626402 43 ROUND CABLE EMI SUPPRESSION CORE
44 FAIR RITE 2643626502 ROUND CABLE EMI SUPPRESSION CORES
45 FAIR RITE 2643803802 ROUND CABLE EMI SUPPRESSION CORES
46 FAIR RITE 2643804502 ROUND CABLE EMI SUPPRESSION CORES
47 FAIR RITE 2643806402 ROUND CABLE EMI SUPPRESSION CORES
48 FAIR RITE 2673000101 EMI suppression bead1
1 FAIR RITE 199000005
2 FAIR RITE 199000017
3 FAIR RITE 199000018
4 FAIR RITE 199000034
5 FAIR RITE 199001401
6 FAIR RITE 431164181
7 FAIR RITE 431164281
8 FAIR RITE 431164951
9 FAIR RITE 431167281
10 FAIR RITE 431173551
11 FAIR RITE 443163951
12 FAIR RITE 443164151
13 FAIR RITE 443164251
14 FAIR RITE 443167251
15 FAIR RITE 443625006
16 FAIR RITE 444164181
17 FAIR RITE 444164281
18 FAIR RITE 444164951
19 FAIR RITE 444167281
20 FAIR RITE 444173551
21 FAIR RITE 444176451
22 FAIR RITE 2631102002
23 FAIR RITE 2631665702
24 FAIR RITE 2643000101
25 FAIR RITE 2643000801
26 FAIR RITE 2643000801
27 FAIR RITE 2643001501
28 FAIR RITE 2643021801
29 FAIR RITE 2643102002
30 FAIR RITE 2643102402
31 FAIR RITE 2643164251
32 FAIR RITE 2643166651
33 FAIR RITE 2643166851
34 FAIR RITE 2643167851
35 FAIR RITE 2643169552
36 FAIR RITE 2643375002
37 FAIR RITE 2643480002
38 FAIR RITE 2643540002
39 FAIR RITE 2643540402
40 FAIR RITE 2643625002
41 FAIR RITE 2643625102
42 FAIR RITE 2643626302
43 FAIR RITE 2643626402
45 FAIR RITE 2643803802
46 FAIR RITE 2643804502
47 FAIR RITE 2643806402
48 FAIR RITE 2673000101
49 FAIR RITE 2673000301
50 FAIR RITE 2673000801
51 FAIR RITE 2677006302
52 FAIR RITE 2743001111
53 FAIR RITE 2743001112
54 FAIR RITE 2743001112
55 FAIR RITE 2743002111
56 FAIR RITE 2743002112
57 FAIR RITE 2743003112
58 FAIR RITE 2743003112
59 FAIR RITE 2743004111
60 FAIR RITE 2743007112
61 FAIR RITE 2743009111
62 FAIR RITE 2743015112
63 FAIR RITE 2743019446
64 FAIR RITE 2743019447
65 FAIR RITE 2743019447
66 FAIR RITE 2743021447
67 FAIR RITE 2743037447
68 FAIR RITE 2744045447
69 FAIR RITE 2744051447
70 FAIR RITE 2744555576
71 FAIR RITE 2744555577
72 FAIR RITE 2773021447
73 FAIR RITE 2773037447
74 FAIR RITE 2873000202
75 FAIR RITE 2873002402
76 FAIR RITE 2943666631
77 FAIR RITE 2943666681
78 FAIR RITE 2944666661
79 FAIR RITE 2944777741
80 FAIR RITE 2961666671
81 FAIR RITE 0443 164 051
82 FAIR RITE 0443 166 651
83 FAIR RITE 0443 167 251
84 FAIR RITE 0443163951B
85 FAIR RITE 0443164051B
86 FAIR RITE 0443164151B
87 FAIR RITE 0443164251B
88 FAIR RITE 0443166651B
89 FAIR RITE 0443167251B
90 FAIR RITE 0443625006B
91 FAIR RITE 0443665806B
92 FAIR RITE 0443800506B
93 FAIR RITE 0443806406B
94 FAIR RITE 2506031017Y0
95 FAIR RITE 2506036017Y0
96 FAIR RITE 2506036017Y0
97 FAIR RITE 2508051217Y0
98 FAIR RITE 2508051217Z0
99 FAIR RITE 2508053017Y0
100 FAIR RITE 2508056017Y0
101 FAIR RITE 2512066017Y1
102 FAIR RITE 2512066017Y1
103 FAIR RITE 2512067007Y3
104 FAIR RITE 2512067007Y3
105 FAIR RITE 2518061517Y0
106 FAIR RITE 2518065007Y6
107 FAIR RITE 2518121217Y3
108 FAIR RITE 2518121217Y6
109 FAIR RITE 264 3665 702
110 FAIR RITE 2643000101C
111 FAIR RITE 2643000301/F1
112 FAIR RITE 2643000301C
113 FAIR RITE 2643000801C
114 FAIR RITE 2643002402/E1
115 FAIR RITE 2643002402C
116 FAIR RITE 2643102002B
117 FAIR RITE 2643540002B
118 FAIR RITE 2643665702B
119 FAIR RITE 2643801002B
120 FAIR RITE 2643802702B
121 FAIR RITE 2643803802B
122 FAIR RITE 2643804502B
123 FAIR RITE 2673000101C
124 FAIR RITE 2673000301C
125 FAIR RITE 2743001112H
126 FAIR RITE 2743003112H
127 FAIR RITE 2743009112H
128 FAIR RITE 2743019447H
129 FAIR RITE 2743021447H
130 FAIR RITE 2743021447-TR
131 FAIR RITE 2944666631/G1
132 FAIR RITE 2944666631C
133 FAIR RITE 2944666661C
134 FAIR RITE 2944666671C
135 FAIR RITE 2944666671G
