【选型】力特快熔陶瓷保险丝用于车灯控制板电源输入过流防护设计，小尺寸，分断电流能力达50A

时间： 2023-03-02 来源：世强

技术问答

为避免车灯控制板12V电源输入因负载短路异常造成后级IC芯片烧毁风险，建议在电源输入加一款特快熔保险丝做次级过流防护，选型因素参考如下：

1、额定工作电压：乘用车12V蓄电池供电，以2倍过压考量，一般选择耐压至少24VDC险丝即可

2、额定工作电流：与负载功率相关，一般输入电流1.6A左右，以1.5倍过流防护，建议选择2.5的保险丝设计即可

3、小尺寸

针对如上的设计需求，推荐LITTELFUSE（力特）特快熔陶瓷保险丝 045302.5MR，2410封装，最大额定工作电压125VAC/VDC，额定工作电流2.5A，分断电流能力达50A@125VAC/VDC，工作温度范围-55℃~125℃，通过UL、CSA、PSE、CE、TUV等安规认证，典型电性参数参考如下图1所示。

图1：Littelfuse（力特）特快熔保险丝045302.5MR典型电性参数

推荐理由如下：

1、分断电流能力50A，具有高的安全切断电流能力，产品可靠性高；

2、采用2410封装，典型尺寸仅6.1*2.69mm，占板空间少，满足小型化设计需求；

3、通过UL、CSA、PSE、CE、TUV等安规认证，可满足欧美日等出口安规认证要求。

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Littelfuse（力特） 451/453系列数据手册

型号- 045101.5MRSN,0453.250MRSN,0451.500MRSN,045101.6MRL,0451004.MRSN,04533.15MR,0451.800MR,0451.200MRSN,0453004.MR,0451.100MRL,0451.375MRSN,0451012.MR,0453.080MRSN,0451002.MRL,0453007.MR,0451015.MR,0453.315MRSN,0451003.MRSN,045301.6MRSN,0453.400MR,0451.630MRL,0453.630MR,0451.160MRSN,0451.315MRL,0451010.MRL,0451.200MRL,0453010.MR,04533.15MRSN,0453.062MR,0453.062MRSN,0453.630MRA,0451.375MR,0453.125MRSN,0451.100MR,0451.250MRL,0451004.,0453.750MR,0453.400MRSN,0451007.MRL,045302.5MR,0453.160MR,0451020.MRSN,0453.100MRSN,0451012.MRL,0453007.MRSN,0453012.MRSN,0451004.MR,0451.800MRSN,0453.800MR,0451001.MRSN,04513.15MR,0453.750MRSN,0451.125MRL,0451.400MRL,0451010.MR,0451005.MRL,0451007.MRSN,045306.3MR,0451.750MRL,045303.5MRSN,045102.5MR,0451.250MR,0451.500MR,0451.400MRSN,0451.062MR,0453012.MR,0451007.MR,0451.125MRSN,045106.3MRSN,0453005.MRSN,0453008.MRSN,0453002.MRSN,0451.160MR,045101.5MRL,0451003.MRL,0453.100MR,0451.080MR,04513.15MRSN,04511.25MRSN,0451.315MR,0453001.MR,0451020.MRL,0451010.MRSN,0453.630MRSN,0453015.MR,045302.5MRSN,0451002.MR,045106.3MRL,0451.062MRL,04531.25MR,045106.3MR,045101.6MR,0453.500MRSN,0451012.MRSN,0453001.MRL,0451001.MRL,0451.250MRSN,0451001.,0453003.MRSN,04531.25,0453.160MRSN,0451.080MRSN,045102.5MRL,0453.375MRSN,0451.750MR,0453.630,045301.5MR,0451.315MRSN,045301.5MRSN,0453.200MRSN,0451005.MR,045101.6MRSN,0451008.,0453020.MR,0451008.MRL,045303.5MR,0453.500MR,0451.800MRL,0451.080MRL,0451.100MRSN,0453003.MR,0451.125MR,04513.15MRL,0453.800MRSN,0451.750MRSN,0451.200MR,0453001.MRSN,0451008.MR,0453004.MRSN,045103.5MRL,0453.315MR,0453015.MRSN,0453020.MRSN,045101.5MR,0451.630MR,0451015.MRSN,0451.400MR,045301.6MR,0451003.,0451001. MRL,0453002.MR,451,453,0451.160MRL,0451015.MRL,0453010.MRSN,0451.500MRL,0451001.MR,0451020.MR,045103.5MRSN,0451003.MR,0451.630MRSN,0451.062MRSN,0453.080MR,0453.375MR,0453.250MR,045102.5MRSN,0451008.MRSN,045103.5MR,0451005.MRSN,0451002.,0453001.,0453005.MR,0451002.MRSN,04531.25MRSN,0453008.MR,0451.375MRL,0453.200MR,045306.3MRSN,0451004.MRL,04511.25MRL,0453.125MR,04511.25MR

数据手册 - LITTELFUSE - Revised: 06/15/17 - 2017年06月15日 PDF 英文下载

451/453 Series Fuse Surface Mount Fuses

型号- 045101.5MRSN,045101.6MRL,0451.500MRSN,0451004.MRSN,04533.15MR,0451.200MRSN,0453004.MR,0451.100MRL,0451.375MRSN,0453007.MR,0451002.MRL,0451003.MRSN,0453.400MR,0451.630MRL,0453.630MR,0451.160MRSN,0451.315MRL,0451010.MRL,0451.200MRL,0453010.MR,0453.062MR,0451.250MRL,0453.750MR,0451007.MRL,045302.5MR,0451020.MRSN,0453.160MR,0451012.MRL,0451.800MRSN,0453.800MR,0451001.MRSN,0451.125MRL,0451.400MRL,0451005.MRL,0451007.MRSN,045306.3MR,0451.750MRL,0451.400MRSN,0453012.MR,0451.125MRSN,045106.3MRSN,045101.5MRL,0451003.MRL,0453.100MR,04513.15MRSN,04511.25MRSN,0453001.MR,0451020.MRL,0451010.MRSN,0453015.MR,045106.3MRL,0451.062MRL,04531.25MR,0451012.MRSN,453 SERIES,0451001.MRL,0451.250MRSN,0451.080MRSN,045102.5MRL,045301.5MR,0451.315MRSN,045101.6MRSN,0453020.MR,0451008.MRL,045303.5MR,0453.500MR,0451.800MRL,0451.080MRL,0451.100MRSN,0453003.MR,04513.15MRL,0451.750MRSN,045103.5MRL,451 SERIES,0453.315MR,0451015.MRSN,045301.6MR,0453002.MR,0451.160MRL,0451015.MRL,0451.500MRL,045103.5MRSN,0451.062MRSN,0451.630MRSN,0453.080MR,0453.375MR,045102.5MRSN,0451008.MRSN,0453.250MR,0451005.MRSN,0453005.MR,0451002.MRSN,0453008.MR,0451.375MRL,0453.200MR,0451004.MRL,04511.25MRL,0453.125MR

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型号- 045101.5MRSN,045101.6MRL,0451.500MRSN,0451005.NRL,0451.100MRL,0451010.NRSN,0451002.MRL,0451003.MRSN,0453001.NRSN,0453015.NRSN,0451.160MRSN,0451010.MRL,0453020.NRSN,04533.15MRSN,0453.500NRSN,0453.062MRSN,0451.250NRSN,0451.250MRL,0453003.NRSN,04511.25NRSN,0451020.MRSN,0453.100MRSN,045301.5NRSN,045101.6NRSN,0451001.MRSN,045101.6NRL,0451005.NRSN,0451005.MRL,0451007.MRSN,0451.100NRL,045102.5NRL,045303.5MRSN,0451002.NRL,0451.400MRSN,0451.125MRSN,0453008.MRSN,045101.5MRL,0451.800NRL,0451012.NRSN,04511.25MRSN,0451.080NRL,0451.250NRL,0451010.MRSN,04513.15NRL,0453010.NRSN,0451.160NRSN,045302.5MRSN,0451.062MRL,0453.400NRSN,0451.630NRSN,0453.125NRSN,0451.250MRSN,0451.750NRL,0453003.MRSN,0453008.NRSN,045102.5MRL,0451.160NRL,0451.500NRL,0453007.NRSN,0451.800NRSN,045101.6MRSN,0451020.NRL,0451008.MRL,0451.100MRSN,04513.15MRL,0451003.NRSN,0451.375NRL,0453.800MRSN,045103.5MRL,0451004.NRL,0453004.MRSN,0451015.MRSN,0451.062NRL,045302.5NRSN,0451015.MRL,0451.160MRL,0451.500MRL,0453012.NRSN,0451010.NRL,0451008.NRL,0451.630MRSN,0451004.NRSN,0451005.MRSN,0451.375MRL,045303.5NRSN,0453.062NRSN,045103.5NRL,0451004.MRL,0451.062NRSN,0453002.NRSN,0453.250MRSN,0451008.NRSN,04513.15NRSN,0451004.MRSN,0451.100NRSN,0451.200MRSN,0451.375MRSN,0453.080MRSN,0453.315MRSN,0451015.NRL,045301.6MRSN,0453.800NRSN,0453.630NRSN,0451.630MRL,0451.315MRL,0451.200MRL,0451003.NRL,0453.750NRSN,0453.125MRSN,0453.400MRSN,0451007.MRL,04511.25NRL,0451012.MRL,0453.200NRSN,0453012.MRSN,0453007.MRSN,045106.3NRL,0451.800MRSN,0451.125MRL,0451.400MRL,0453.750MRSN,045102.5NRSN,045301.6NRSN,0451.750MRL,0451.630NRL,045306.3NRSN,0451.200NRL,0453004.NRSN,0451.315NRL,045106.3MRSN,0451015.NRSN,0453005.MRSN,0453002.MRSN,0451003.MRL,04513.15MRSN,0453.080NRSN,0451020.MRL,0451007.NRL,0453.315NRSN,0453.375NRSN,0453.630MRSN,045103.5NRSN,045106.3MRL,04533.15NRSN,0453.500MRSN,0451012.MRSN,0451.125NRL,0451.400NRL,0451001.MRL,0451002.NRSN,0451.080MRSN,0453.160MRSN,04531.25NRSN,0453.375MRSN,0453.100NRSN,0451.315MRSN,045101.5NRL,045301.5MRSN,0453.200MRSN,0451.500NRSN,0451.800MRL,0451.080MRL,045101.5NRSN,0451.200NRSN,0451.750MRSN,0453001.MRSN,0453020.MRSN,0453015.MRSN,0453005.NRSN,045106.3NRSN,0451001.NRL,451,453,0451.750NRSN,0453010.MRSN,045103.5MRSN,0453.250NRSN,0451001.NRSN,0451.062MRSN,0451008.MRSN,045102.5MRSN,0451020.NRSN,0451.375NRSN,0451007.NRSN,0453.160NRSN,0451002.MRSN,04531.25MRSN,0451.080NRSN,045306.3MRSN,0451.315NRSN,0451.400NRSN,0451012.NRL,04511.25MRL,0451.125NRSN

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