【选型】大型工业PoE交换机电源220VAC电源输入过流防护推荐力特小体积延时保险丝，满足3C认证需求

时间： 2021-01-06 来源：世强

技术问答

大型工业PoE交换机一般支持4~24口，每端口输出规格一般为30W/48Vdc，为满足3C安全认证需求，一般需要在电源板220VAC电源输入母线上加入一颗保险丝做过流保护设计，最大额定输入电流3.27A左右（=30W/端口*24端口/220Vac），以1.5倍过流考量，建议选择额定工作电流为5A的保险丝即可；

针对如上的设计需求，推荐选择LITTELFUSE（力特）TE5延时保险丝 39215000000，本体长宽高尺寸是8.5x4x8（mm）封装尺寸，最大额定工作电压250VAC，额定工作电流5A，分段电流能力达50A@250Vac，满足3C认证标志，工作温度范围-40℃~125℃，典型电性参数参考如下图1所示。

图1：Littelfuse（力特）TE5延时保险丝39215000000典型电性参数

推荐理由如下：

1、额定电压为250VAC，额定电流为5A，电性参数上可满足基本需求；

2、常温25℃条件下的正常冷却阻值为0.0101Ω，自损耗很小；

3、工作温度范围-55℃~125℃，适用于极端低温环境工作；

4、具有良好的供货交期，可以快速支持样品和量产服务。

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【选型】TE5延时保险丝用于微型逆变器DC/AC电源输出过流防护设计，可直接软焊或插入满足小型化设计需求

为避免微逆电源输出因负载短路异常造成燃烧风险，建议在DC/AC电源输出母线上加入延时熔断保险丝做过流保护设计，推荐选择Littelfuse TE5延时熔断保险丝 39215000000，最大额定工作电压250Vac，额定工作电流5A。

器件选型发布时间 : 2021-10-29

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为避免小功率500VA 300W UPS电源输入因负载短路异常造成燃烧风险，一般需要在电源输入端加上一颗延时熔断保险丝做过流保护设计，推荐选择Littelfuse（力特）TE5超小型慢熔保险丝39213150000，其采用防电击外壳设计，产品具有高安全性。

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【选型】力特超小型慢熔保险丝40012000440助力欧规15W电源适配器设计，分断电流能力达130A

为避免15W电源适配器（输出电压12V，输出电流1.25A）电源输入因负载短路异常造成燃烧风险，一般需要在电源输入加一颗延时熔断保险丝做过流保护设计，推荐选择Littelfuse（力特）TE5超小型慢熔保险丝40012000440。

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Littelfuse（力特）关于保险丝增加CCC认证标志或由CQC改为CCC认证标志的更新通知（LFPCN20190909 ）

型号- 0215005.MG930T1SPP,0219.050MXAP,0216008.MXR8SPP,087706.3MXSSPF18P,0215010.MXBP,0876002.MRET1P,021506.3MXF162SPP,39208000000,02153.15MXK41SPP,0215008.MXF103SPP,40014000440,40011250440,0216008.TXP,0216008.MRET1P,0215005.MXESPP,0216008.MXEP,0216010.MXB940P,0215001.MXESPP,0215010.MRET1AP,0215008.MXF13P,0215.400MRET1P,0216008.MRET1SPP,0215008.MRET1SPP,0215.125MXBP,0219.100MXAP,39211000440,0215.315MXF34P,0215010.MXK40SPP,02153.15MXF134SPP,0215008.MXB948P,0215.250MXP,0215010.MXF152SPP,0215.500MXP,021506.3MXF151SPP,0215008.MX909P,0215010.MRET5LP,0215.200MXEP,0215004.MG944T1SPP,40012000000,3921315L000,0215001.MXK20SPP,0215008.MXF160SPP,0215008.MXB949P,02153.15MXF156SPP,08773.15MXPF18P,0216008.MXGP,0215010.MXEP,021501.6MRET1SPP,0215.200MXGP,0215002.MXF134SPP,0216004.MXR6SPP,37215000001,0219.040MXAESP,07771.25MRET1RFP,077701.6MRET1P,021601.6MRET1SPP,38216300430,0215008.MXB901P,0877004.MRET1P,0215005.MXF155SPP,0216010.MXF11P,0876.630MRET1P,0215010.MXG940P,02153.15MXF155SPP,0215008.MXF159SPP,219XA,39208000440,38215000430,835,0215.400MXEP,0215.125MXEP,0216010.MXF34P,0216008.MXR9SPP,02153.15MG947T1SPP,39214000000,39211250000,0215002.MXEASPP,0215010.MXGP,4001200E000,4001200E001,0876004.MXEP,39212001000,021601.6MXR24SPP,0215.315HXP,0216008.MXESPP,0215010.MXF120SPP,39211000000,0215001.MXF163SPP,0215004.MXF160SPP,021602.5MXESPP,38216300000,0215.200HXP,02151.25MRET1SPP,38215000410,0877002.MXSSPF26P,40012000440,0219.100MXAEP,0215008.MXP,0215.400MXGP,021506.3MRET1SPP,0215.630MRET1P,0215010.MRET1SPP,0215004.MRET1SPP,0215010.MXK10P,0215.400MRGT1P,0215010.MXP,0215002.MXG933SPP,3921200K000,40008000440,0215010.MRET1P,0215.630MXP,0215.500MXGP,0215.200MXP,0215.500HXP,0215008.MXF52P,0215010.MXK15P,07771.25MXPF011P,0215010.MRET2P,0876005.MRET1P,876,877,0877004.MXSSPF18P,02153.15MG936T1SPP,021606.3MXESPP,0219.050MXAEP,02153.15MXF160SPP,0215005.MXF156SPP,0215010.MXEP-RES,37016300410,0215010.MXF103SPP,39211250440,0216010.MXEP,0215008.MXF41P,40015000000,40016300075,021502.5MXESPP,400,0216002.MRET1SPP,0215010.MXF162SPP,0215005.MXF111SPP,08773.15MXSSEP,0876.630MXEP,0219.040MXAEP,0216004.MXESPP,087706.3MXEP,0216001.MXR20SPP,0216010.MXBP,37215000511,02163.15MRET1SPP,0215008.MRET5LP,021506.3MXF160SPP,02153.15MRET1SPP,777,0215.800MRET1P,0215.400MXP,0876.250MXEP,02153.15MXESPP,0215008.MXF67P,0215010.MRET5P,0215.315MXP,0215008.MRET3SPP,37016300430,0215002.MXF120SPP,40008000000,40013150075,0216010.VXP,0215.200MRGT1P,0215005.MXF134SPP,021501.6MXESPP,0216010.MXESPP,0835008.MXF66P,0215.250TXP,0215004.MXK6SPP,0215.500MXF22P,0215010.MXF74P,37215000411,0215008.MXF20P,0215008.MXF56P,0876.250MRET1P,0877004.MXSSPF26P,0215010.MXF48LP,02153.15MRET3SPP,40014000000,0215002.MXK21SPP,0215008.MXF162SPP,39211000075,0215004.MXF134SPP,021606.3MXR8SPP,0215010.MXF51P,0215010.MXESPP,0215.630MRGT1P,021601.6MXESPP,0215010.MRG943T1P,0215008.MXG941P,021506.3MG946T1SPP,39211258000,0215010.MRGT1P,0215002.MXG935SPP,37216300001,0215008.MXBF20P,39211600440,0877004.MXSSPF15P,38216300410,0215008.MXF104SPP,0215.250MRGT1P,0216010.MRG943T5P,0215.200MRET1P,02163.15MXESPP,40012500075,0215.800TXP,07771.25MRET1P,37215000431,0215008.MXF22P,0215008.MXF34P,0215.160MXEP,021606.3MRET1SPP,215,216,021602.5MRET1SPP,0216008.MXP,0216010.MRET1SPP,0215005.MXK7SPP,0215004.MXESPP,0215010.MXF73P,0215010.MXF61P,021506.3MXESPP,0219.040MXAP,0216010.MXGP,39213150075,0215008.MXF11P,40011000075,0215008.MXF59P,0216008.MXF13P,0216010.TXP,0215010.MXF60P,0219.063MXAEP,0215.500TXP,0215008.MXK14P,40016300000,0215.250VXP,021506.3MRET1ASPP,02153.15MXF151SPP,0215008.MXK5P,0876004.MRET1P,0215.400HXP,0215008.HXP,0215.630MXGP,021502.5MXEASPP,37016300000,0215010.MXB950P,39215000000,39216300075,0215008.MRET1P,0215004.MXEASPP,02163.15MXR11SPP,0215005.MXF160SPP,0215.800MXEP,0215010.MXF8P,39211600000,0215.315MXBP,021602.5MXR23SPP,0215010.VXP,0215.800VXP,0216001.MXESPP,0215.315MRET1P,370,372,0215008.MXK7P,0215.315MXEP,0877002.MXSSLPF38P,0216010.MXR10SPP,0877002.MRT1SSEP,0216008.MXR9P,087706.3MRET1P,02153.15MXF162SPP,40013150000,0215010.MXB940P,0216010.MRET5LP,0215.500MXBP,0215.250MXBP,0215010.MXF41P,0215008.MXF71P,382,0215008.MXK8P,0215.800MXGP,021502.5MXK23SPP,02163.15MXSRESPP,08773.15MXSSPF18P,0216005.MXESPP,0215010.MXSREP,0215002.MXK22SPP,0215005.MXF159SPP,40012500440,0215.125MRGT1P,0215.500VXP,0215005.MRET1SPP,0216005.MRET1SPP,0215008.VXP,0215010.MXF46P,0215010.MXF34P,40011000000,392,39212500000,39213150000,021506.3MXF134SPP,0215008.MXK9SPP,37216300411,0215.315MXGP,40011600440,02153.15MXG947SPP,0215.800MXBP,39215000440,0215010.MXF11P,0215010.MXF35P,0215008.MXGP,0215004.MXF155SPP,0215008.MXF61P,40015000440,0215010.MXF159SPP,0215004.MXF120SPP,0215010.TXP,021506.3MXK39SPP,0215005.MXG930SPP,0215.250HXP,021502.5MAT5ASPP,0219.063MXAP,0215.125MRET1P,0215010.MXF56P,0215.500MXEP,0215010.MXF20P,0215010.MXSRF75P,0215.800HXP,021502.5MRET1SPP,0215.630HXP,0216010.HXP,0215008.MXP-RES,0876.160MRET1P,37216300431,0876002.MRETDLP,0215008.MG948T1SPP,087601.6MRET1P,021502.5MXF103SPP,0215001.MRET1SPP,021506.3MXF155SPP,40013150440,0215008.MXEP,08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型号- 39202800000,39202800440,38511500440,38706300000,392,39212500000,39212500440,39213150000,39213150440,39212000440,39212000000,39208000000,39208000440,39215000000,39215000440,392XXXX0000,39214000440,39214000000,39211250000,39000320000,39211250440,392 SERIES,39211600440,39211600000,39211000000,39211000440,392XXXX0000,392XXXX0440,39216300000,39216300440

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型号- 392XXXX0000,392 SERIES,392

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型号- 400,400 SERIES,400XXXX0000

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型号- 400,400 SERIES

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型号- 39214000075,39214000230,39211250075,392,39212500000,39212500440,39213150000,39213150440,39212000000,39212000440,3921200,39208000000,39208000440,3921400,3921125,39211600075,39202250000,3921250000A,39215000000,39215000440,39211000075,3921160,39216300075,39215000075,39214000000,39214000440,3920225,3921100076B,39211250000,39211250440,3921315,39211258000,39212001000,39211600000,39211600440,39212000075,3921630,39211000000,39211000440,392XXXX0000,39202800000,39202800440,3921500,39212000100,3921100,39212500075,3920800,39213150075,3921250,39208000075,3921200K000,3921200076B,39216300000,39216300440,3920280,39202808260

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