WMZ12A,WMZ12A热敏电阻-南京华巨电子有限公司

NTC热敏电阻系列

电子体温计专用热敏电阻

PTC热敏电阻系列

线性热敏电阻系列

		过流保护型 PTC热敏电阻

1.应用范围：

　　过流保护型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：
　　将过流保护型型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。
　过流保护型型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：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
ML	18	5	7.5
LL	24	5	7.5	0.8

5.主要技术参数：
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耐工频电压Vmax=265Vac

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）
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)	Dmax	Tmax	d±0.05	F±1
WMZ12A-70LB15RM080	80mA at 40℃±2℃	160mA at 25℃±2℃	15±20%	1.0	8	5	0.6	5
WMZ12A-70LB12RM090	90mA at 40℃±2℃	180mA at 25℃±2℃	12±20%
WMZ12A-70LB10RM100	100mA at 40℃±2℃	200mA at 25℃±2℃	10±20%
WMZ12A-75S222RM002	2mA at 60℃±2℃	10mA at 25℃±2℃	2200±20%	0.2	4	4.5	0.5	5
WMZ12A-75S152RM003	3mA at 60℃±2℃	12mA at 25℃±2℃	1500±20%
WMZ12A-75S102RM004	4mA at 60℃±2℃	16mA at 25℃±2℃	1000±20%
WMZ12A-75S681RM005	5mA at 60℃±2℃	20mA at 25℃±2℃	680±20%
WMZ12A-75S471RM006	6mA at 60℃±2℃	24mA at 25℃±2℃	470±20%	0.3
WMZ12A-75S331RM007	7mA at 60℃±2℃	30mA at 25℃±2℃	330±20%
WMZ12A-75S221RM009	9mA at 60℃±2℃	36mA at 25℃±2℃	220±20%
WMZ12A-75S151RM010	10mA at 60℃±2℃	40mA at 25℃±2℃	150±20%	0.4
WMZ12A-75S101RM012	12mA at 60℃±2℃	50mA at 25℃±2℃	100±20%	0.4
WMZ12A-75A471RM007	7mA at 60℃±2℃	28mA at 25℃±2℃	470±20%	0.4	6.5	4.5	0.6	5
WMZ12A-75A331RM008	8mA at 60℃±2℃	34mA at 25℃±2℃	330±20%	0.4
WMZ12A-75A221RM010	10mA at 60℃±2℃	40mA at 25℃±2℃	220±20%	0.5
WMZ12A-75A151RM012	12mA at 60℃±2℃	48mA at 25℃±2℃	150±20%
WMZ12A-75A121RM013	13mA at 60℃±2℃	52mA at 25℃±2℃	121 ±20%
WMZ12A-75A101RM014	14mA at 60℃±2℃	56mA at 25℃±2℃	100±20%	0.6
WMZ12A-75A68RM016	16mA at 60℃±2℃	64mA at 25℃±2℃	68±20%
WMZ12A-75A47RM020	20mA at 60℃±2℃	80mA at 25℃±2℃	47±20%
WMZ12A-75B331RM010	10mA at 60℃±2℃	40mA at 25℃±2℃	330±20%	0.8	8	4.5	0.6	5
WMZ12A-75B221RM012	12mA at 60℃±2℃	50mA at 25℃±2℃	220±20%
WMZ12A-75B151RM015	15mA at 60℃±2℃	60mA at 25℃±2℃	150±20%
WMZ12A-75B101RM018	18mA at 60℃±2℃	70mA at 25℃±2℃	100±20%	1.0
WMZ12A-75B82RM020	20mA at 60℃±2℃	80mA at 25℃±2℃	82±20%	1.0
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%	0.2	4.5	5.0	0.6	5
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%	0.4
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%	0.8
WMZ12A-85B151RM025	25mA at 60℃±2℃	100mA at 25℃±2℃	150±20%	0.8	8	4.5	0.6	5
WMZ12A-85B121RM030	30mA at 60℃±2℃	120mA at 25℃±2℃	120±20%	0.8
WMZ12A-85B101RM035	35mA at 60℃±2℃	140mA at 25℃±2℃	100±20%	0.9
WMZ12A-85B82RM040	40mA at 60℃±2℃	160mA at 25℃±2℃	82±20%	0.9
WMZ12A-85B68RM045*	45mA at 60℃±2℃	180mA at 25℃±2℃	68±20%	1.2
WMZ12A-85B47RM050	50mA at 60℃±2℃	200mA at 25℃±2℃	47±20%
WMZ12A-85B25RM065*	65mA at 60℃±2℃	260mA at 25℃±2℃	25±20%
WMZ12A-85LB68RM060	37mA at 60℃±2℃	110mA at 25℃±2℃	68±20%	1.2	9	4.5	0.6	5
WMZ12A-85LB47RM065	40mA at 60℃±2℃	120mA at 25℃±2℃	47±20%
WMZ12A-85LB39RM070	50mA at 60℃±2℃	150mA at 25℃±2℃	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%	1.2
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-105S102RM010	10mA at 60℃±2℃	25mA 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%	0.9
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-120B56RM080	80mA at 60℃±2℃	205mA at 25℃±2℃	56±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-120LB68RM075	75mA at 60℃±2℃	180mA at 25℃±2℃	68±20%	1.2	9	5	0.6	5
WMZ12A-120LB82RM060	60mA at 60℃±2℃	145mA at 25℃±2℃	82±20%	1.2	9	5	0.6	5
WMZ12A-120LB101RM055	55mA at 60℃±2℃	130mA at 25℃±2℃	100±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-120SL45RM120	120mA at 60℃±2℃	300mA at 25℃±2℃	45±20%	2.5	15	5	0.6	5
WMZ12A-120SL22RM180	180mA at 60℃±2℃	360mA at 25℃±2℃	22±20%
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℃	520mA 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%	3.1	17.5	5	0.6	5
WMZ12A-120LL12RM300	300	600	12±20%	3.5	24	5	0.8	7.5
WMZ12A-120LL10RM330	330	660	10±20%	3.5
WMZ12A-120LL8R2M360	360	720	8.2±20%	4.0
WMZ12A-120LL6R8M400	400	800	6.8±20%	4.0
WMZ12A-120LL4R7M450	450	900	4.7±20%	4.5
WMZ12A-120LL3R3M500	500	1000	3.3±20%	4.5
WMZ12A-120LL2R2M550	550	1100	2.2±20%	5.0
WMZ12A-120LL1R5M600	600	1200	1.5±20%	5.0

·用于485，232等接口电路保护

自动抄表技术在电表应用中越来越流行，该技术为电表提供通信端口远程读取数据，RS-485是一种简单、廉价而且可靠的通信规范,而PTC热敏电阻能为RS-485电表线路可提供过压,过流保护,譬如RS-485总线与电力线(例如，220/380V)短路时. WMZ12A-85A50RMU,WMZ12A-85BHV68RMU是设计专门对RS-485电表线路进行过流,过载保护的一种PTC.当线路处于正常状态时, PTC处于常态,阻值很小,不会影响被保护电路的正常工作.当电路出现故障,电流增大, PTC呈现高阻态,使电路处于相对”断开”状态,从而保护RS-485接口不受损坏,当故障排除后, PTC亦自动回复到低阻态.

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)
序号	型号	R25(Ω)	Int（mA）	It(mA)	(A)	(Vac)	Dmax	Tmax	F±1	dmax
1	WMZ12A-85A50RMU	50±20%	30	60	0.8	265	6.5	5.0	5.0	0.6
2	WMZ12A-85B68RMU	68±20%	45	90	1.2	420	8.5	7.0	5.0	0.6