1.应用范围:
WMZ12A型PTC热敏电阻主要用于[变压器(适配器)/初级线圈/充电器/数字万用表/智能电度表/微电机/晶体管]等的过流过热保护,直接串联在负载电路中,在线路出现异常状况时,能够自动限制过电流或阻断电流,当故障排除后又恢复原态,俗称“万次保险丝”。
2.特点:
·无触点的电路及元器件保护 ·自动限制过电流
·故障排除后自动恢复 ·工作时无噪音无火花
·工作可靠、使用方便
3.应用原理:
将WMZ12A型PTC热敏电阻串联在电源回路中,当电路处于正常状态时,流过PTC的电流小于额定电流,PTC处于常态,阻值很小,不会影响电子镇流器(节能灯、变压器、万用表)等被保护电路的正常工作。当电路电流大大超过额定电流时,PTC陡然发热,阻值骤增至高阻态,从而限制或阻断电流,保护电路不受损坏。电流电流回复正常后,PTC亦自动回复至低阻态,电路恢复正常工作。
WMZ12A型PTC热敏电阻在电子镇流器(节能灯、变压器、万用表)等过流保护应用领域,南京华巨凭借其科研和工艺等方面的优势,率先推出了以高耐压(V≥300V AC )为特色的WMZ12型产品。
4.产品标志说明:
①产品系列:WMZ12A过流/过热保护系列PTC热敏电阻
②开关温度类别:75-75℃ 105-105℃ 120-120℃
③芯片直径:S-Φ3 A-Φ5 B-Φ7 LB-Φ8 M-Φ10 SL-Φ13 LL-Φ19
④标称阻值:82R-82Ω 4R7-4.7Ω 151-150Ω
⑤阻值精度:N-±30% M-±20% k-±10% J-±5%
⑥最大不动作电流:060-60mA 300-300mA
使用PTC作为过流保护元件,一般应选取最大不动作电流、最大工作电压合适的规格,同时也应考虑元件的外形尺寸、额定零功率电阻、使用温度范围等因素。通常取电路正常工作时的最大工作电流的1.2~1.5倍为PTC最大不动作电流;线路在正常或不正常状态下可能施加到PTC上的电压应不大于其最大工作电压。
L | 5.5 | 4.5 | 5 | 0.6 |
5.主要技术参数:
·WMZ12A(I)主要用于充电器、适配器(初级线圈)、电能表、数字万用表等过流保护
80mA at 40℃±2℃ | 1.0 | 8 | 5 | 0.6 | 5 | |||
90mA at 40℃±2℃ | 180 | 12±20% | ||||||
100mA at 40℃±2℃ | 10±20% | |||||||
4 |
||||||||
121 ±20% | ||||||||
28 |
||||||||
68±20% | ||||||||
WMZ12A-75A47RM040 | 40 | 80 | ||||||
WMZ12A-80S681RM005* |
5mA at 60℃±2℃ |
20mA at 25℃±2℃ |
680±20% |
0.2 |
||||
WMZ12A-80S471RM006* |
6mA at 60℃±2℃ |
24mA at 25℃±2℃ |
470±20% | |||||
WMZ12A-80LB50RM060* |
45mA at 60℃±2℃ |
120mA at 25℃±2℃ |
50±20% |
1.2 | 9 | 5 | 0.6 | 5 |
WMZ12A-85A102RM0045* |
4.5mA at 60℃±2℃ |
19mA at 25℃±2℃ |
1000±20% |
0.4 |
||||
WMZ12A-85A681RM007* |
7mA at 60℃±2℃ |
30mA at 25℃±2℃ |
680±20% | |||||
WMZ12A-85A50RM030* |
30mA at 60℃±2℃ |
60mA at 25℃±2℃ |
50±20% |
0.8 | ||||
25mA at 60℃±2℃ |
90mA at 25℃±2℃ |
70±20% | ||||||
150±20% |
||||||||
120±20% | ||||||||
100±20% |
||||||||
82±20% | ||||||||
WMZ12A-85B70RM045* |
45mA at 60℃±2℃ |
90mA at 25℃±2℃ |
70±20% |
|||||
WMZ12A-85B47RM055 |
55mA at 60℃±2℃ |
110mA at 25℃±2℃ |
||||||
WMZ12A-85B25RM065* |
65mA at 60℃±2℃ |
130mA at 25℃±2℃ |
25±20% | |||||
WMZ12A-95LB22RM100 | 100 | 200 | 22±20% | |||||
45mA at 60℃±2℃ |
130mA at 25℃±2℃ |
|||||||
50mA at 60℃±2℃ |
145mA at 25℃±2℃ |
|||||||
55mA at 60℃±2℃ |
160mA at 25℃±2℃ |
60±20% |
2.0 | |||||
60mA at 60℃±2℃ |
180mA at 25℃±2℃ |
50±20% | ||||||
WMZ12A-100B22RM090* |
90mA at 60℃±2℃ |
260mA at 25℃±2℃ |
22±20% | |||||
WMZ12A-105S102RM015 | 15mA at 60℃±2℃ | 35mA at 25℃±2℃ | 1000±20% | |||||
WMZ12A-105L221RM025 | 25mA at 60℃±2℃ | 65mA at 25℃±2℃ | ||||||
WMZ12A-105L75RM45 | 45mA at 60℃±2℃ | |||||||
WMZ12A-105L68RM50 | 50mA at 60℃±2℃ | |||||||
WMZ12A-105L47RM55 | 55mA at 60℃±2℃ | |||||||
WMZ12A-105A68RM50 | 55mA at 60℃±2℃ | |||||||
85mA at 60℃±2℃ | 213mA at 25℃±2℃ | |||||||
100mA at 60℃±2℃ | ||||||||
22±20% | ||||||||
WMZ12A-105M22RM120 | 22±20% | 1.6 | ||||||
WMZ12A-120L101RM040 | 100±20% | |||||||
WMZ12A-120L75RM045 | 75±20% | |||||||
WMZ12A-120L62RM050 | 62±20% | |||||||
WMZ12A-120A102RM015 | 1000±20% | 0.4 | 6.5 | 5 | 0.6 | 5 | ||
WMZ12A-120A301RM020 | 300±20% | |||||||
WMZ12A-120A151RM040 | 40mA at 60℃±2℃ | 151±20% | ||||||
WMZ12A-120A101RM050 | 100±20% | |||||||
WMZ12A-120A68RM060 | 60mA at 60℃±2℃ | 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-120M181RM040 |
180±20% |
1.6 | 12 | 5 | 0.6 | 5 | ||
WMZ12A-120M101RM060 |
100±20% | |||||||
WMZ12A-120M82RM065 |
82±20% | |||||||
60±20% | ||||||||
55±20% | ||||||||
WMZ12A-120M8R2M170 | 170mA at 60℃±2℃ | 340mA at 25℃±2℃ | 8.2±20% | |||||
180mA at 60℃±2℃ | 2.5 | |||||||
15±20% | ||||||||
240mA at 60℃±2℃ | ||||||||
260mA at 60℃±2℃ | ||||||||
WMZ12A-120GL6R0M300 | 300mA at 60℃±2℃ | 780mA at 25℃±2℃ | 6.0±20% | 3.1 |
17.5 |
5 |
0.6 |
5 |
WMZ12A-120GL7R0M280 | 280mA at 60℃±2℃ | 700mA at 25℃±2℃ | 7.0±20% | |||||
·WMZ12A(Ⅱ)主要用于防雷,通信机过流保护
其它电性能参数:
耐工频电流能力:3Arms 220Vrms 20times
耐雷击波能力:10/310μs 1.5KV37.5A 10times
10/1000μs 1.0KV25A 30times
耐电压能力:250Vrms 3Arms 15min
恢复时间:≤60S
耐高压感应能力:650Vrms 1.1Arms 20times
Int(mA) |
最大电流下 的动作时间 |
最大电流 Imax |
最大电压 Vmax |
失效模式 | |||||||
R25(Ω) | at 40℃ | t(Sec) | (A) | (V) | Dmax | Tmax | F±1 | ||||
WMZ12A-10RM100 | 10±20% | 100 | < 0.2 | 3.0 | 250 | 250V/10A | 7.5 | 4.0 | 5.0 | 0.6 | |
WMZ12A-12RM100 | 12±20% | 100 | < 0.3 | 2.0 | 250 | 250V/10A | 9.0 | 5.0 | 5.0 | 0.6 | |
WMZ12A-12RM060 | 12±20% | 60 | < 0.2 | 2.0 | 250 | 250V/10A | 9.0 | 5.0 | 5.0 | 0.6 | |
4 | WMZ12A-20RM080 | 10±20% | 80 | < 0.2 | 3.0 | 250 | 250V/10A | 9.0 | 4.0 | 5.0 | 0.6 |
WMZ12A-35RM075 | 35±20% | 75 | < 0.2 | 3.0 | 250 | 250V/5A | 9.0 | 5.0 | 5.0 | 0.6 | |
WMZ12A-40RM070 | 40±20% | 70 | < 0.2 | 3.0 | 250 | 250V/5A | 9.0 | 5.0 | 5.0 | 0.6 | |
WMZ12A-50RM060 | 50±20% | 60 | < 0.2 | 3.0 | 250 | 250V/5A | 9.0 | 5.0 | 5.0 | 0.6 | |
WMZ12A-50RM060 | 50±20% | 60 | < 0.2 | 3.0 | 650 | 650V/10A | 9.5 | 5.0 | 5.0 | 0.6 | |
WMZ12A-55RM060 | 55±20% | 60 | < 0.2 | 3.0 | 650 | 650V/10A | 9.5 | 5.0 | 5.0 | 0.6 | |
WMZ12A-9R0M130 | 9±20% | 130 | < 0.8 | 3.0 | 250 | 250V/10A | 10.5 | 4.5 | 5.0 | 0.6 | |
WMZ12A-25RM080 | 25±20% | 80 | < 0.2 | 3.0 | 250 | 250V/10A | 6.6 | 4.0 | 5.0 | 0.6 | |
WMZ12A-25RM100 | 25±20% | 100 | < 0.4 | 3.0 | 250 | 250V/10A | 8.2 | 4.0 | 5.0 | 0.6 | |
WMZ12A-10RM130 | 10±20% | 130 | < 0.5 | 3.0 | 250 | 250V/10A | 9.5 | 4.5 | 5.0 | 0.6 | |
14 | WMZ12A-12RM090 | 12±20% | 90 | < 0.3 | 2.0 | 250 | 250V/10A | 9.5 | 4.5 | 5.0 | 0.6 |
15 | WMZ12A-15RM070 | 15±20% | 70 | < 0.2 | 2.0 | 250 | 250V/10A | 9.5 | 4.5 | 5.0 | 0.6 |
WMZ12A-18RM110 | 18±20% | 110 | < 0.4 | 3.0 | 250 | 250V/10A | 9.5 | 4.5 | 5.0 | 0.6 | |
17 | WMZ12A-20RM070 | 20±20% | 70 | < 0.2 | 3.0 | 250 | 250V/10A | 9.5 | 4.5 | 5.0 | 0.6 |
18 | WMZ12A-35RM060 | 35±20% | 60 | < 0.2 | 3.0 | 250 | 250V/10A | 9.5 | 4.5 | 5.0 | 0.6 |
19 | WMZ12A-50RM060 | 50±20% | 60 | < 0.2 | 3.0 | 250 | 250V/10A | 11 | 4.5 | 5.0 | 0.6 |
20 | WMZ12A-55RM060 | 55±20% | 60 | < 0.2 | 3.0 | 250 | 250V/10A | 11 | 4.5 | 5.0 | 0.6 |
21 | WMZ12A-101RM050 | 100±20% | 50 | < 0.1 | 3.0 | 250 | 250V/10A | 9.0 | 4.5 | 5.0 | 0.6 |
22 | WMZ12A-10RM140SMD | 10±20% | 140 | < 5.0 | 1.0 | 250 | 250V/10A | / | / | / | / |
23 | WMZ12A-9R0M130SMD | 9±20% | 130 | < 0.5 | 3.0 | 250 | 250V/10A | / | / | / | / |
24 | WMZ12A-25RM100SMD | 25±20% | 100 | < 0.3 | 3.0 | 250 | 250V/10A | / | / | / | / |
25 | WMZ12A-25RM100SMD | 25±20% | 100 | < 0.4 | 3.0 | 300 | 300V/10A | / | / | / | / |
26 | WMZ12A-39RM070SMD | 39±20% | 70 | < 0.3 | 3.0 | 300 | 300V/10A | / | / | / | / |
27 | WMZ12A-50RM070SMD | 50±20% | 70 | < 0.2 | 3.0 | 250 | 250V/5A | / | / | / | / |
28 | WMZ12A-50RM060SMD | 50±20% | 60 | < 0.2 | 3.0 | 600 | 600V/5A | / | / | / | / |
29 | WMZ12A-55RM050SMD | 55±20% | 50 | < 0.2 | 3.0 | 600 | 600V/5A | / | / | / | / |
30 | WMZ12A-20RM080SMD | 20±20% | 80 | < 0.2 | 3.0 | 250 | 250V/10A | / | / | / | / |
·WMZ12A(Ⅲ)高压PTC热敏电阻,用于485,232等接口电路保护
at 25℃ |
at 25℃ |
最大电流 Imax |
最大电压 Vmax |
|||||||
R25(Ω) | Int(mA) | It(mA) | (A) | (Vac) | ||||||
1 | WMZ12A-120G601RH021 | 600±25% | 21 | 39 | 0.2 | 420 | 7.0 | 5.0 | 5.0 | 0.6 |
2 | WMZ12A-120G151RH050 | 150±25% | 50 | 100 | 2.0 | 12.5 | 7.0 | 5.0 | 0.6 | |
3 | WMZ12A-120G151RH043 | 150±25% | 43 | 86 | 1.4 | 8.5 | 7.0 | 5.0 | 0.6 | |
4 | WMZ12A-120G131RH045 | 130±25% | 45 | 90 | 1 | 7.5 | 7.0 | 5.0 | 0.6 | |
5 | WMZ12A-120G121RH056 | 120±25% | 56 | 112 | 2.0 | 12.5 | 7.0 | 5.0 | 0.6 | |
6 | WMZ12A-120G121RH049 | 120±25% | 49 | 97 | 1.4 | 8.5 | 7.0 | 5.0 | 0.6 | |
7 | WMZ12A-120G80RH069 | 80±25% | 69 | 137 | 2.0 | 12.5 | 7.0 | 5.0 | 0.6 | |
8 | WMZ12A-120G70RH064 | 70±25% | 64 | 127 | 1.4 | 8.5 | 7.0 | 5.0 | 0.6 | |
9 | WMZ12A-120G50RH087 | 50±25% | 87 | 173 | 2.0 | 12.5 | 7.0 | 5.0 | 0.6 | |
10 | WMZ12A-120G25RH123 | 25±25% | 123 | 245 | 2.0 | 12.5 | 7.0 | 5.0 | 0.6 | |
11 | WMZ12A-120G561RH022 | 560±25% | 22 | 44 | 0.3 | 450 | 7.0 | 5.0 | 5.0 | 0.6 |
12 | WMZ12A-120G381RH030 | 380±25% | 30 | 56 | 0.3 | 7.0 | 5.0 | 5.0 | 0.6 | |
13 | WMZ12A-120G251RH032 | 250±25% | 32 | 65 | 0.3 | 7.0 | 5.0 | 5.0 | 0.6 | |
14 | WMZ12A-115G112RH016 | 1100±25% | 16 | 32 | 1.0 | 550 | 8.5 | 7.0 | 5.0 | 0.6 |
15 | WMZ12A-115G102RH015 | 1000±25% | 15 | 30 | 0.1 | 7.0 | 5.0 | 5.0 | 0.6 | |
16 | WMZ12A-115G501RH028 | 500±25% | 28 | 55 | 1.4 | 12.5 | 7.0 | 5.0 | 0.6 | |
17 | WMZ12A-120G152RH012 | 1500±25% | 12 | 24 | 0.1 | 7.0 | 5.0 | 5.0 | 0.6 | |
18 | WMZ12A-120G122RH015 | 1200±25% | 15 | 30 | 0.1 | 7.0 | 5.0 | 5.0 | 0.6 | |
19 | WMZ12A-120G501RH024 | 500±25% | 24 | 48 | 1.0 | 8.5 | 7.0 | 5.0 | 0.6 | |
20 | WMZ12A-90G132RH013 | 1300±25% | 13 | 26 | 0.3 | 600 | 7.0 | 5.0 | 5.0 | 0.6 |
21 | WMZ12A-90G102RH015 | 1000±25% | 15 | 30 | 0.3 | 7.0 | 5.0 | 5.0 | 0.6 | |
22 | WMZ12A-90G801RH018 | 800±25% | 18 | 36 | 0.3 | 7.0 | 5.0 | 5.0 | 0.6 | |
23 | WMZ12A-100G272RH010 | 2700±25% | 10 | 20 | 0.2 | 7.0 | 5.0 | 5.0 | 0.6 | |
24 | WMZ12A-100G152RH014 | 1500±25% | 14 | 28 | 0.2 | 7.0 | 5.0 | 5.0 | 0.6 | |
25 | WMZ12A-110G752RH008 | 7500±25% | 8 | 17 | 0.5 | 1000 | 12.5 | 7.0 | 5.0 | 0.6 |