WMZ12A型PTC热敏电阻
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。
类型代号
Dmax
Tmax
F±1
d±0.05
S
4.5
4.5
5
0.5
L
5.5
4.5
5
0.6
A
6.5
4.5
5
0.6
B
8
4.5
5
0.6
LB
9
4.5
5
0.6
M
12
5
5
0.6
SL
15
5
7.5
0.8
LL
24
5
7.5
0.8
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
型号
MAX Non OperaTIng Current at 25℃ 最大不动作电流In (mA)
Trip Current at 25℃动作电流It (mA)
额定零功率电阻值R 25 （Ω）
最大工作电流I max (A)
外形尺寸（mm）
Dmax
Tmax
d±0.05
F±1
WMZ12A-70LB15RM080
80mA at 40℃±2℃
160
15±20%
1.0
8
5
0.6
5
WMZ12A-70LB12RM090
90mA at 40℃±2℃
180
12±20%
WMZ12A-70LB10RM100
100mA at 40℃±2℃
200
10±20%
WMZ12A-75S222RM005
5
10
2200±20%
0.2
4
4.5
0.5
5
WMZ12A-75S152RM006
6
12
1500±20%
WMZ12A-75S102RM008
8
16
1000±20%
WMZ12A-75S681RM010
10
20
680±20%
WMZ12A-75S471RM012
12
24
470±20%
0.3
WMZ12A-75S331RM015
15
30
330±20%
WMZ12A-75S221RM018
18
36
220±20%
WMZ12A-75S151RM020
20
40
150±20%
0.4
WMZ12A-75S101RM025
25
50
100±20%
WMZ12A-75A471RM014
14
28
470±20%
0.4
6.5
4.5
0.6
5
WMZ12A-75A331RM017
17
34
330±20%
WMZ12A-75A221RM020
20
40
220±20%
0.5
WMZ12A-75A151RM024
24
48
150±20%
WMZ12A-75A121RM026
26
52
121 ±20%
WMZ12A-75A101RM028
28
56
100±20%
0.6
WMZ12A-75A68RM032
32
64
68±20%
WMZ12A-75A47RM040
40
80
47±20%
WMZ12A-75B331RM020
20
40
330±20%
0.8
8
4.5
0.6
5
WMZ12A-75B221RM025
25
50
220±20%
WMZ12A-75B151RM030
30
60
150±20%
WMZ12A-75B101RM035
35
70
100±20%
1.0
WMZ12A-75B82RM040
40
80
82±20%
WMZ12A-75LB82RM035
35mA at 60℃±2℃
90mA at 25℃±2℃
82±20%
1.0
9
4.5
0.6
5
WMZ12A-75LB68RM040
40mA at 60℃±2℃
100mA at 25℃±2℃
68±20%
1.2
WMZ12A-75LB47RM045
45mA at 60℃±2℃
110mA at 25℃±2℃
47±20%
WMZ12A-75LB33RM050
50mA at 60℃±2℃
125mA at 25℃±2℃
33±20%
WMZ12A-75LB22RM060
60mA at 60℃±2℃
150mA at 25℃±2℃
22±20%
1.5
WMZ12A-75LB15RM070
70mA at 60℃±2℃
175mA at 25℃±2℃
15±20%
WMZ12A-75LB10RM080
80mA at 60℃±2℃
200mA at 25℃±2℃
10±20%
WMZ12A-80S681RM005*
5mA at 60℃±2℃
20mA at 25℃±2℃
680±20%
0.2
4.5
5.0
0.6
5
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
6.5
5.0
0.6
5
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
WMZ12A-85A70RM025*
25mA at 60℃±2℃
90mA at 25℃±2℃
70±20%
WMZ12A-85B151RM35
35
70
150±20%
0.8
8
4.5
0.6
5
WMZ12A-85B121RM040
40
80
120±20%
WMZ12A-85B101RM045
45
90
100±20%
0.9
WMZ12A-85B82RM050
50
100
82±20%
WMZ12A-85B70RM045*
45mA at 60℃±2℃
90mA at 25℃±2℃
70±20%
1.2
WMZ12A-85B47RM055
55mA at 60℃±2℃
110mA at 25℃±2℃
47±20%
WMZ12A-85B25RM065*
65mA at 60℃±2℃
130mA at 25℃±2℃
25±20%
WMZ12A-85LB68RM060
60
120
68±20%
1.2
9
4.5
0.6
5
WMZ12A-85LB47RM065
65
130
47±20%
WMZ12A-85LB39RM070
70
140
39±20%
WMZ12A-85LB33RM075
75
150
33±20%
WMZ12A-85LB25RM080
80
160
25±20%
1.5
WMZ12A-85LB22RM085
85
170
22±20%
WMZ12A-85LB18RM090
90
180
18±20%
WMZ12A-85LB15RM098
98
196
15±20%
WMZ12A-85LB12RM105
105
210
12±20%
WMZ12A-85LB10RM115
115
230
10±20%
WMZ12A-95LB22RM100
100
200
22±20%
WMZ12A-100B131RM045*
45mA at 60℃±2℃
130mA at 25℃±2℃
130±20%
1.2
8.5
5.0
0.6
5
WMZ12A-100B70RM050*
50mA at 60℃±2℃
145mA at 25℃±2℃
70±20%
WMZ12A-100B60RM055*
55mA at 60℃±2℃
160mA at 25℃±2℃
60±20%
2.0
WMZ12A-100B50RM060*
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%
0.25
4.5
4.5
0.5
5
WMZ12A-105S221RM020
20mA at 60℃±2℃
50mA at 25℃±2℃
220±20%
WMZ12A-105S151RM025
25mA at 60℃±2℃
65mA at 25℃±2℃
150±20%
WMZ12A-105S101RM030
30mA at 60℃±2℃
75mA at 25℃±2℃
100±20%
WMZ12A-105L221RM025
25mA at 60℃±2℃
65mA at 25℃±2℃
220±20%
0.3
5.5
4.5
0.5
5
WMZ12A-105L151RM030
30mA at 60℃±2℃
75mA at 25℃±2℃
150±20%
WMZ12A-105L121RM35
35mA at 60℃±2℃
88mA at 25℃±2℃
120±20%
WMZ12A-105L101RM40
40mA at 60℃±2℃
100mA at 25℃±2℃
100±20%
WMZ12A-105L75RM45
45mA at 60℃±2℃
100mA at 25℃±2℃
75±20%
WMZ12A-105L68RM50
50mA at 60℃±2℃
125mA at 25℃±2℃
68±20%
WMZ12A-105L47RM55
55mA at 60℃±2℃
138mA at 25℃±2℃
47±20%
WMZ12A-105A151RM035
35mA at 60℃±2℃
88mA at 25℃±2℃
150±20%
0.4
5.5
4.5
0.5
5
WMZ12A-105A101RM45
45mA at 60℃±2℃
115mA at 25℃±2℃
100±20%
WMZ12A-105A68RM50
55mA at 60℃±2℃
138mA at 25℃±2℃
68±20%
WMZ12A-105B151M045
45mA at 60℃±2℃
113mA at 25℃±2℃
150±20%
0.8
8
4.5
0.6
5
WMZ12A-105B121M050
50mA at 60℃±2℃
125mA at 25℃±2℃
120±20%
WMZ12A-105B101M055
55mA at 60℃±2℃
138mA at 25℃±2℃
100±20%
WMZ12A-105B82RM060
60mA at 60℃±2℃
150mA at 25℃±2℃
82±20%
0.9
WMZ12A-105B62RM075
75mA at 60℃±2℃
188mA at 25℃±2℃
62±20%
WMZ12A-105LB39RM085
85mA at 60℃±2℃
213mA at 25℃±2℃
39±20%
1.2
9
4.5
0.6
5
WMZ12A-105LB22RM100
100mA at 60℃±2℃
250mA at 25℃±2℃
22±20%
WMZ12A-105LB15RM110
110mA at 60℃±2℃
275mA at 25℃±2℃
15±20%
WMZ12A-105LB10RM120
120mA at 60℃±2℃
300mA at 25℃±2℃
22±20%
WMZ12A-105M22RM120
120mA at 60℃±2℃
300mA at 25℃±2℃
22±20%
1.6
12
4.5
0.6
5
WMZ12A-105M15RM130
130mA at 60℃±2℃
325mA at 25℃±2℃
15±20%
WMZ12A-105M10RM140
140mA at 60℃±2℃
350mA at 25℃±2℃
10±20%
WMZ12A-105M8R2M150
150mA at 60℃±2℃
375mA at 25℃±2℃
8.2±20%
WMZ12A-105SL18RM150
150mA at 60℃±2℃
375mA at 25℃±2℃
18±20%
2.5
15
5
0.8
7.5
WMZ12A-105SL15RM160
160mA at 60℃±2℃
400mA at 25℃±2℃
15±20%
WMZ12A-105SL12RM170
170mA at 60℃±2℃
425mA at 25℃±2℃
12±20%
WMZ12A-105SL10RM180
180mA at 60℃±2℃
450mA at 25℃±2℃
10±20%
WMZ12A-105SL8R2M190
190mA at 60℃±2℃
480mA at 25℃±2℃
8.2±20%
WMZ12A-105SL6R8M200
200mA at 60℃±2℃
500mA at 25℃±2℃
6.8±20%
WMZ12A-120L101RM040
40mA at 60℃±2℃
80mA at 25℃±2℃
100±20%
0.3
5.5
4.5
0.6
5
WMZ12A-120L75RM045
45mA at 60℃±2℃
90mA at 25℃±2℃
75±20%
WMZ12A-120L62RM050
50mA at 60℃±2℃
100mA at 25℃±2℃
62±20%
WMZ12A-120A102RM015
15mA at 60℃±2℃
40mA at 25℃±2℃
1000±20%
0.4
6.5
5
0.6
5
WMZ12A-120A301RM020
20mA at 60℃±2℃
50mA at 25℃±2℃
300±20%
WMZ12A-120A151RM040
40mA at 60℃±2℃
80mA at 60℃±2℃
151±20%
WMZ12A-120A101RM050
50mA at 60℃±2℃
100mA at 60℃±2℃
100±20%
WMZ12A-120A68RM060
60mA at 60℃±2℃
120mA at 25℃±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
40mA at 60℃±2℃
80mA at 25℃±2℃
180±20%
1.6
12
5
0.6
5
WMZ12A-120M101RM060
60mA at 60℃±2℃
120mA at 25℃±2℃
100±20%
WMZ12A-120M82RM065
65mA at 60℃±2℃
130mA at 25℃±2℃
82±20%
WMZ12A-120M60RM070
70mA at 60℃±2℃
140mA at 25℃±2℃
60±20%
WMZ12A-120M55RM080
80mA at 60℃±2℃
160mA at 25℃±2℃
55±20%
WMZ12A-120M47RM090
90mA at 60℃±2℃
180mA at 25℃±2℃
47±20%
WMZ12A-120M39RM100
100mA at 60℃±2℃
200mA at 25℃±2℃
39±20%
WMZ12A-120M33RM110
110mA at 60℃±2℃
220mA at 25℃±2℃
33±20%
WMZ12A-120M22RM130
130mA at 60℃±2℃
260mA at 25℃±2℃
22±20%
WMZ12A-120M15RM150
145mA at 60℃±2℃
290mA at 25℃±2℃
15±20%
WMZ12A-120M10RM170
160mA at 60℃±2℃
320mA at 25℃±2℃
10±20%
WMZ12A-120M8R2M170
170mA at 60℃±2℃
340mA at 25℃±2℃
8.2±20%
WMZ12A-120SL22RM180
180mA at 60℃±2℃
360mA at 25℃±2℃
22±20%
2.5
15
5
0.6
5
WMZ12A-120SL15RM200
200mA at 60℃±2℃
400mA at 25℃±2℃
15±20%
WMZ12A-120SL12RM210
210mA at 60℃±2℃
420mA at 25℃±2℃
12±20%
WMZ12A-120SL10RM220
220mA at 60℃±2℃
440mA at 25℃±2℃
10±20%
WMZ12A-120SL8R2M240
240mA at 60℃±2℃
480mA at 25℃±2℃
8.2±20%
WMZ12A-120SL6R8M260
260mA at 60℃±2℃
320mA at 25℃±2℃
6.8±20%
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-120LL12RM300
300
600
12±20%
3.5
24
5
0.8
7.5
WMZ12A-120LL10RM330
330
660
10±20%
WMZ12A-120LL8R2M360
360
720
8.2±20%
4.0
WMZ12A-120LL6R8M400
400
800
6.8±20%
WMZ12A-120LL4R7M450
450
900
4.7±20%
4.5
WMZ12A-120LL3R3M500
500
1000
3.3±20%
WMZ12A-120LL2R2M550
550
1100
2.2±20%
5.0
WMZ12A-120LL1R5M600
600
1200
1.5±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
序号
型号
额定零功率电阻
最大不动作电流
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
外形尺寸(mm)
R25(Ω)
at 40℃
t(Sec)
(A)
(V)
Dmax
Tmax
F±1
dmax
1
WMZ12A-10RM100
10±20%
100
< 0.2
3.0
250
250V/10A
7.5
4.0
5.0
0.6
2
WMZ12A-12RM100
12±20%
100
< 0.3
2.0
250
250V/10A
9.0
5.0
5.0
0.6
3
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
5
WMZ12A-35RM075
35±20%
75
< 0.2
3.0
250
250V/5A
9.0
5.0
5.0
0.6
6
WMZ12A-40RM070
40±20%
70
< 0.2
3.0
250
250V/5A
9.0
5.0
5.0
0.6
7
WMZ12A-50RM060
50±20%
60
< 0.2
3.0
250
250V/5A
9.0
5.0
5.0
0.6
8
WMZ12A-50RM060
50±20%
60
< 0.2
3.0
650
650V/10A
9.5
5.0
5.0
0.6
9
WMZ12A-55RM060
55±20%
60
< 0.2
3.0
650
650V/10A
9.5
5.0
5.0
0.6
10
WMZ12A-9R0M130
9±20%
130
< 0.8
3.0
250
250V/10A
10.5
4.5
5.0
0.6
11
WMZ12A-25RM080
25±20%
80
< 0.2
3.0
250
250V/10A
6.6
4.0
5.0
0.6
12
WMZ12A-25RM100
25±20%
100
< 0.4
3.0
250
250V/10A
8.2
4.0
5.0
0.6
13
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
16
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
序号
型号
额定零功率电阻
最大不动作电流
at 25℃
动作电流
at 25℃
最大电流
Imax
最大电压
Vmax
外形尺寸(mm)
R25(Ω)
Int（mA）
It(mA)
(A)
(Vac)
Dmax
Tmax
F±1
dmax
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
