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4.產品標志說明：
①產品系列：過流/過熱保護系列PTC熱敏電阻
②開關溫度類別：75-75℃ 105-105℃ 120-120℃
③芯片直徑：S-Φ3 A-Φ5 B-Φ7 LB-Φ8 M-Φ10 SL-Φ13 LL-Φ19
④標稱阻值：82R-82Ω 4R7-4.7Ω 151-150Ω
⑤阻值精度：N-±30％ M-±20％ k-±10％ J-±5％
⑥最大不動作電流：060-60mA 300-300mA
使用PTC作為過流保護元件,一般應選取最大不動作電流、最大工作電壓合適的規格,同時也應考慮元件的外形尺寸、額定零功率電阻、使用溫度范圍等因素。通常取電路正常工作時的最大工作電流的1.2～1.5倍為PTC最大不動作電流；線路在正常或不正常狀態下可能施加到PTC上的電壓應不大于其最大工作電壓。
| L | 5.5 | 4.5 | 5 | 0.6 |
5.主要技術參數：
主要用于充電器、適配器（初級線圈）、電能表、數字萬用表等過流保護
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80mA at 40℃±2℃ |
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1.0 | 8 | 5 | 0.6 | 5 |
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90mA at 40℃±2℃ | 180 | 12±30% | |||||
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100mA at 40℃±2℃ |
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10±30% | |||||
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4 |
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121 ±30% |
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28 |
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68±30% | |||||
| WMZ12A-75A47RM040 | 40 | 80 |
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| WMZ12A-80S681RM005* |
5mA at 60℃±2℃ |
20mA at 25℃±2℃ |
680±30% |
0.2 |
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| WMZ12A-80S471RM006* |
6mA at 60℃±2℃ |
24mA at 25℃±2℃ |
470±30% |
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| WMZ12A-80LB50RM060* |
45mA at 60℃±2℃ |
120mA at 25℃±2℃ |
50±30% |
1.2 | 9 | 5 | 0.6 | 5 |
| WMZ12A-85A102RM0045* |
4.5mA at 60℃±2℃ |
19mA at 25℃±2℃ |
1000±30% |
0.4 |
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| WMZ12A-85A681RM007* |
7mA at 60℃±2℃ |
30mA at 25℃±2℃ |
680±30% | |||||
| WMZ12A-85A50RM030* |
30mA at 60℃±2℃ |
60mA at 25℃±2℃ |
50±30% |
0.8 |
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25mA at 60℃±2℃ |
90mA at 25℃±2℃ |
70±30% |
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150±30% |
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120±30% |
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100±30% |
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82±30% |
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| WMZ12A-85B68RM045* |
45mA at 60℃±2℃ |
90mA at 25℃±2℃ |
68±30% |
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| WMZ12A-85B47RM055 |
55mA at 60℃±2℃ |
110mA at 25℃±2℃ |
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| WMZ12A-85B25RM065* |
65mA at 60℃±2℃ |
130mA at 25℃±2℃ |
25±30% | |||||
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| WMZ12A-95LB22RM100 | 100 | 200 | 22±30% | |||||
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45mA at 60℃±2℃ |
130mA at 25℃±2℃ |
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50mA at 60℃±2℃ |
145mA at 25℃±2℃ |
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55mA at 60℃±2℃ |
160mA at 25℃±2℃ |
60±30% |
2.0 |
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60mA at 60℃±2℃ |
180mA at 25℃±2℃ |
50±30% |
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| WMZ12A-100B22RM090* |
90mA at 60℃±2℃ |
260mA at 25℃±2℃ |
22±30% |
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| WMZ12A-105S102RM015 | 15mA at 60℃±2℃ | 35mA at 25℃±2℃ | 1000±30% |
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| WMZ12A-105L221RM025 | 25mA at 60℃±2℃ | 65mA at 25℃±2℃ |
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| WMZ12A-105L75RM45 | 45mA at 60℃±2℃ |
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| WMZ12A-105L68RM50 | 50mA at 60℃±2℃ |
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| WMZ12A-105L47RM55 | 55mA at 60℃±2℃ |
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| WMZ12A-105A68RM50 | 55mA at 60℃±2℃ |
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85mA at 60℃±2℃ | 213mA at 25℃±2℃ |
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100mA at 60℃±2℃ |
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22±30% | |||||
| WMZ12A-105M22RM120 |
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22±20% | 1.6 |
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| WMZ12A-120L101RM040 |
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100±30% |
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| WMZ12A-120L75RM045 |
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75±30% | |||||
| WMZ12A-120L62RM050 |
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62±30% | |||||
| WMZ12A-120A102RM015 |
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1000±30% | 0.4 | 6.5 | 5 | 0.6 | 5 |
| WMZ12A-120A301RM020 |
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300±30% | |||||
| WMZ12A-120A151RM040 | 40mA at 60℃±2℃ |
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151±30% | |||||
| WMZ12A-120A101RM050 |
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100±30% | |||||
| WMZ12A-120A68RM060 | 60mA at 60℃±2℃ |
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68±20% | |||||
| WMZ12A-120A47RM065 | 65mA at 60℃±2℃ | 130mA at 25℃±2℃ | 47±20% | |||||
| WMZ12A-120B251RM030 | 30mA at 60℃±2℃ | 75mA at 25℃±2℃ | 250±20% | 0.9 | 8 | 5 | 0.6 | 5 |
| WMZ12A-120B121RM045 | 45mA at 60℃±2℃ | 110mA at 25℃±2℃ | 121±20% | |||||
| WMZ12A-120B101RM050 | 50mA at 60℃±2℃ | 125mA at 25℃±2℃ | 100±20% | |||||
| WMZ12A-120B68RM070 | 70mA at 60℃±2℃ | 180mA at 25℃±2℃ | 68±20% | |||||
| WMZ12A-120LB25RM110 | 110mA at 60℃±2℃ | 270mA at 25℃±2℃ | 25±20% | 1.2 | 9 | 5 | 0.6 | 5 |
| WMZ12A-120LB39RM100 | 100mA at 60℃±2℃ | 240mA at 25℃±2℃ | 39±20% | 1.2 | 9 | 5 | 0.6 | 5 |
| WMZ12A-120M181RM040 |
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180±20% |
1.6 | 12 | 5 | 0.6 | 5 |
| WMZ12A-120M101RM060 |
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100±20% |
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| WMZ12A-120M82RM065 |
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82±20% |
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60±20% |
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55±20% |
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| WMZ12A-120M8R2M170 | 170mA at 60℃±2℃ | 340mA at 25℃±2℃ | 8.2±20% | |||||
| WMZ12A-120SL45RM120 | 120mA at 60℃±2℃ | 300mA at 25℃±2℃ | 45±20% | 2.5 |
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180mA at 60℃±2℃ |
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15±20% | |||||
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240mA at 60℃±2℃ |
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260mA at 60℃±2℃ |
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| WMZ12A-120GL6R0M300 | 300mA at 60℃±2℃ | 780mA at 25℃±2℃ | 6.0±20% | 3.1 |
17.5 |
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| WMZ12A-120GL7R0M280 | 280mA at 60℃±2℃ | 700mA at 25℃±2℃ | 7.0±20% | |||||
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·用于485，232等接口電路保護
自動抄表技術在電表應用中越來越流行，該技術為電表提供通信端口遠程讀取數據，RS-485是一種簡單、廉價而且可靠的通信規范,而PTC熱敏電阻能為RS-485電表線路可提供過壓,過流保護,譬如RS-485總線與電力線(例如，220/380V)短路時. WMZ12A-85A50RMU,WMZ12A-85BHV68RMU是設計專門對RS-485電表線路進行過流,過載保護的一種PTC.當線路處于正常狀態時, PTC處于常態,阻值很小,不會影響被保護電路的正常工作.當電路出現故障,電流增大, PTC呈現高阻態,使電路處于相對”斷開”狀態,從而保護RS-485接口不受損壞,當故障排除后, PTC亦自動回復到低阻態.
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at 25℃ |
at 25℃ |
最大電流 Imax |
最大電壓 Vmax |
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| R25(Ω) | Int（mA） | It(mA) | (A) | (Vac) |
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| 1 | WMZ12A-85A50RMU | 50±30% | 30 | 60 | 0.8 | 265 | 6.5 | 5.0 | 5.0 | 0.6 |
| 2 | WMZ12A-85B68RMU | 68±30% | 45 | 90 | 1.2 | 420 | 8.5 | 7.0 | 5.0 | 0.6 |
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Copyright
◎ 2000 南京華巨電子有限公司 All Right Reserved ICP經營許可證號:
蘇ICP備06030855 |
