【应用】326系列保险丝、342838保险丝座成功应用于医疗检测仪器电源保护

时间： 2020-03-13 来源：世强

技术问答

本方案应用于医疗检测仪器，属于实验室仪器，根据《GB 4793.1-2007 测量、控制和实验室用电气设备的安全要求第1部分：通用要求》规定，由电网电源供电的或要与电网电源连接的设备应当用熔断器、断路器、热切断器、阻抗限制电路或类似装置来进行保护，防止设备出现故障时从电网获得过大的能量。这种保护是要限制故障的进一步发展以及着火和火焰蔓延的可能性。过流保护装置也能在故障情况下提供防电击保护。所以，根据安规要求，本方案采用保险丝进行过流保护。

图一：方案设计框图

保险丝的选型至关重要，LITTELFUSE作为全球排名第一的电路保护供应商,能够提供种类最多、范围最广的电路保护产品组合。所以，本方案选择Littelfuse的326系列保险丝进行整机电源的防护，同时为了更换方便，便于售后工程师维护，本方案采用326系列（3AB）保险丝配套的保险丝座 342838进行面板安装设计，如下图：

图二：保险丝及保险丝座

342系列是Littelfuse推出的用于3AG/3AB保险丝的面板封装型保险丝座。该产品符合美国市场的UL认证（E14721）和加拿大市场的CSA认证（7316），安全性能有保证，如图三。342838由黑色热塑性塑料制成，通过氯丁橡胶垫圈在面板正面提供防滴保护，连接端子材料为镀锡/镀镍的铜合金，工作环境温度要求为-40~85℃，温度适应性好，并且额定电流高达20A，热承受能力强，适用于高电流的应用。

图三：符合标准

本方案将342838安装在仪器侧面面板上，如下图所示，当需要更换保险丝时，无需对仪器进行拆装，将仪器断电后，直接在面板处对保险丝座进行旋拧操作，取出烧坏的保险丝，更换上新的littelfuse保险丝即可，维护操作十分方便。

图四：保险丝座面板安装图示

本方案已成功应用于本公司仪器，以上保险丝和保险丝座世强均有备料，成本低，采购周期短，并且世强平台申请样品特别迅速、方便，对前期的研发以及后续的量产备料均有很大的优势。

发送到邮箱 |
+1 赞 0
收藏
评论 0
| 转发至：

本文由慎终如始提供，版权归世强硬创平台所有，非经授权，任何媒体、网站或个人不得转载，授权转载时须注明“来源：世强硬创平台”。

全部评论（0）

暂无评论

【应用】力特PCB焊接的保险丝座及保险丝盖适用于工业控制电源，适配5x20mm的可更换保险丝

力特（Littelfuse）的64600001233是一款PCB焊接的保险丝座，可以通过保险丝盖，防止异物碰撞保险丝，可以搭配5 x20mm的可更换保险丝，广泛应用在工业控制电源回路，通信电源回路里。

应用方案发布时间 : 2022-04-16

【应用】高耐压抗震的656系列保险丝座用于轨道机车电源，轻松应对机车长期高频震动工作环境

轨道交通机车在运行过程中长期处于一个高频震动状态，因此对机车上的各个部件抗震性有着一定的要求，尤其是像机车电源这种关键部位，工作电压较高，因此其输入保险丝需要一款高抗震性和耐压性能的保险座。推荐Littelfuse高抗震、高耐压的656系列保险丝座。

应用方案发布时间 : 2021-10-30

【应用】额定电流为10A的表面贴装保险丝座0154010.用于板载电源保护，方便保险丝更换而给现场维护带来极大便利

笔者项目的模块电机板选择Littelfuse 0154010.保险丝座来装载保险丝，该保险丝座为表面贴装封装，尺寸比较小，占用PCB空间少，可支持尖峰温度高达260℃的回流焊，方便批量焊接。工作温度范围比较宽-55℃~125℃，并且符合RoHS标准且无卤素，完全满足本设计需求。配套Littelfuse 0453系列保险丝，保险丝损坏后，拆卸及安装都很简便快捷，对于现场维护来说十分方便。

应用方案发布时间 : 2020-06-06

【选型】Littelfuse（力特）保险丝电路保护器件选型指南

目录- 保险丝特性/术语/考量因素选择清单标准包装/零件编号免责声明表面贴装保险丝径向引线型保险丝轴向引线型和管式保险丝管式保险丝座特殊应用保险丝

型号- 45302.5,0977016.XEP,03540903ZXGY,0154.125,03540821ZXBL,0482 0007ZXB,03540911ZXGY,01550009ZXA,111 501,111 505,111 506,0454003.,0454001.,01550009ZXU,3453HS3-010,03540001ZXGY,800,801,03540806ZXGY,802,454007,803,804,454005,454004,0477016.XEP,454003,0454002.,807,808,0482 0019ZXB,015401.6,015401.5,0100 0054,208 000P,0977.800XEP,0216 000XP,154.315,820 20,0453.250,0215.125XEP,345 101,225 000P,810,811,640 0000 1603,813,814,815,816,0482 0007ZXP,559 0000 00 01,0154.375,0275025.,121004,282008,65800001XXX,121001,282007,820,121002,821,282002,0100 0058,823,824,282001,0100 0056,3453LF2-010,03540912ZXGY,154.375,0216.800XEP,03540807ZXGY,100 058,0453002.,0453.080,100 054,100 056,01550114ZXA,830,03540902ZXGY,831,0281 0008H,0107 0002,853 0000 1009,834,0454007.,835,837,0477.800XEP,279 000,154.125,0106 0001,216SP,800 01,0154.315,101001,0482 0001ZXPF,0215001.XEP,0453003.,0482 0019ZXP,562 0000 1009,3453HS4-010,01550114ZXU,454002,454001,015403.5,453.062,02450002X,3453LF1-010,65800003XXX,0154.100,850,0482 0009ZXB,851,852,853,855,856,0454005.,02450002H,129 002,0213 000P,129 001,01550020ZXA,0100 0020,0482 0020ZXB,314 000P,866 0000 1009,02450001X,0453001.,15403.5,3453LF1-020,0281 0007H,0482 0020ZXP,0453.062,154.750 T,860,862,865,03540010ZXGY,866,837 0000 0005,02450001H,01550020ZXU,0454004.,0520 0005 ZXGY,313 000P,824 0000 0005,125002,125001,0213 000 XEP,870,03540808ZXGY,874,875,876,877,PICO 259,0217.315 XEP,3453LF4-010,0154.750,0453007.,649 0000 3039,0285.125 XRP,127 002,0281 0005H,640,816 0000 0005,655 0000 0405,400,646,648,649,0482 0015ZXP,127 001,0482 0009ZXBF,0217.400 XEP,815 0000 0005,342 058,52100001009,830 0000 0005,0453004.,01550104ZXU,0482 0002ZXPF,652,653,0482 0005ZXB,655,0482 0010ZXPF,656,101002,658,101003,646 1200 7113,659,01550104ZXA,03540011ZXGY,451.1,03540901ZXGY,0453005.,342 048,660,824 0000 0205,429,0215020P,0482 0017ZXB,649 0000 1039,435,437,438,659 0000 0009,0482 0005ZXP,0451.062,440,441,443,202,203,445,254 121,446,688,447,448,449,208,209,646 1200 7123,154001. T,0482 0003ZXPF,0154.500,0453008.,824 20,451,452,453,0520 0001,354 101-GY,454,213,456,215,03540012ZXGY,458,216,459,217,218,453.1,453.2,03540809ZXGY,453.8,453.5,0520 0004 Z,453.4,460,3453LF3-010,461,0451.080,312 000,462,220,464,465,0482 0008ZXBF,466,224,467,225,468,469,254 101,229,800 0000 0105,0482 0017ZXP,560 0000 13 19,01000020Z,471,230,472,0101 0001,473,232,233,0356 0011Z,234,477,235,239,125 001,125 003,570 0000 0001,125 002,0445 0001,03540601ZXGY,154002. T,109 002,345_ISF,02200029MXP,0281 0001,109 001,481,482,0101 0002,242,485,0101 0003,0482 0016ZXBF,04533.15,245,0356 0010Z,0215020.XEP,01550004ZXA,102064,345 101-010,0482 0002ZXB,0482 0002ZXP,03540005ZXGY,803 01,251,494,253,254,0122 055Z-1,348 677,354 700,01550004ZXU,348 671,03540101ZXGY,0482 0019ZXPF,15401.5 T,03540906ZXGY,3453QS2-010,0216.050XEP,345 101-020,03540803ZXGY,262,102071,263,265,266,267,268,520 001,269,520 003,520 004,PICO 259-UL913,0482 0007ZXBF,0235006.XEP,0482 0004ZXPF,0218 000P,272,030,273,274,03540602ZXGY,275,154.8,262 000,278,0239 000P,279,505 000P,0453.630,154.1,0154007.,0482 0014ZXP,154.5,154.4,154004. T,155 100,154.2,3453QS8-010,01550014ZXA,340 313,0482 0014ZXB,281,282,01550120ZXU,340 312,285,286,155 004A,348 600,04611.25,0453.400,852 0000 1009,01550120ZXA,045306.3,0281 0008 H,1541.25,268 000,811 0000 0005,01500145HXB,01550014ZXU,0482 0017ZXBF,348 877,155 114A,0218.032 XEP,3453QS3-010,278 000,348 871,640 0000 1003,658 0000 1109,0482 0001ZXBF,03540004ZXGY,155 004U,220 000P,58300000005,831 0000 0005,0482 0006ZXBF,451.125,03540907ZXGY,0482 0005ZXPF,155 006A,0154008.,03540802ZXGY,155 114U,00300210M,155 006U,850 0000 1009,0254 0002Z,344 125,658 0000 4009,0482 0010ZXP,045402.5,01550109ZXU,03540905ZXGY,0154003.,0482 0010ZXB,3453LF8-010,01550006ZXU,00300210N,3453QS7-010,0254 0003Z,0232 000P,03540003ZXGY,0482 0002ZXBF,0482 0009ZXP,0154002.,348 800,0482 0009ZXPF,0154.080,0453.200,3453RF8-010,01550100Z,0359 0010Z,315 000P,03540603ZXGY,3453HS1-010,02810001H,520_W,332 000P,224 000P,66000001009,508 000P,0154005.,0477.500XEP,325 000P,155 009A,3453QS4-010,0359 0011Z,0482 0018ZXBF,0254 0001Z,453.315,851 0000 1009,155 009U,15401.6,286 377,15401.5,0482 0021ZXPF,45403.5,0154004.,01550109ZXA,0359 0012Z,653 0000 0405,0482 0008ZXPF,154.375 T,3453LF7-010,454.375,0216001.XEP,835 0000 0005,322 000P,03540805ZXGY,345 121,658 0000 3109,652 0000 0405,03540002ZXGY,266 000,0275030.,154L,02200019MXP,03540604ZXGY,045302.5,281010,03540904ZXGY,208 000EP,0482 0003ZXBF,453.75,45303.5,0216016.XEP,0482 0020ZXPF,0154001.,3453HS2-010,354 900,281007,154T,281008,281005,0482 0012ZXB,0482 0012ZXP,640 0000 1403,03540804ZXGY,51800001009,453.63,0482 0019ZXBF,0356 0012Z,45401.5,0154.062,834 0000 0005,01550006ZXA,0217015 XEP,453.125,344 400,015402.5,0218.125 XEP,0254 0204Z,344 405,230 000P,344 402,0482 0007ZXPF,344 401,0453.160,344 404,344 403,0482 0004ZXBF,0233 000P,0482 0018ZXP,0154.250,0482 0015ZXPF,265 000,354 000,209 000EP,801 0000 0005,453.08,640 0000 1503,0520 0101 Z,03540008ZXGY,0482 0018ZXB,0254 0205Z,810 0000 0005,571 0000 0001,

选型指南 - LITTELFUSE - 2018年11月 PDF 中文下载

【选型】Littelfuse（力特）保险丝座选型指南

目录- Fuse Characteristics, Terms and Consideration Factors Fuse Selection Checklist PTC Characteristics and Terms PTC Product Applications Typical PTC Circuit Protection Designs Fuse Standards Fuse and PTC Products Selection Guide Fuse Packaging and Part Numbering

型号- 1812L,471,230,472,473,232,233,234,235,477,874,875,876,239,877,2016L,461E,485,LORHO,400,157T,369,804,807,808,600R,437 SERIES,USBR,370,251,372,373,494,253,374,2205,SL,0603L,0805L,ST,382,262,383,263,385,265,266,267,268,269,303,429,1210L,LR,LT,391,1206L,392,272,273,274,395,154,275,396,397,398,157,278,399,219XA,279,312,950,313,30R,159,314,435,315,437,438,318,LORHO PTC,160,285,440,250S,441,250R,322,443,202,203,324,VL,325,446,326,447,448,449,208,209,VT,16R,451,452,332,453,154T,454,213,456,215,72R,216,458,60R,217,459,218,977,460,461,220,462,464,465,224,466,225,467,468,501,469,229,505,506,2920L,508

选型指南 - LITTELFUSE PDF 英文下载