【选型】国产慢熔断方形保险丝用于燃气表测温模块220VAC交流电源输入过流防护设计,满足小型化设计需求
为避免燃气表测温模块220VAC交流电源输入因负载短路异常造成燃烧风险,一般在交流电源输入加一颗慢熔保险丝做过流保护设计,可承受高浪涌电流防护,市面上一般选择250VAC/1A的保险丝设计,同时因空间结构限制,必须选择小尺寸表贴保险丝设计。
针对如上的设计需求,本文推荐选择电安科技慢熔断方形保险丝SF303A001,最大额定工作电压250VAC,额定工作电流1A,分断电流能力高达50A@250VAC,工作温度范围-55℃~125℃,典型电性参数参考如下图1所示。
图1:电安科技慢熔保险丝SF303A001典型电性参数
推荐理由如下:
1、采用2410表贴封装,典型封装尺寸6.1×2.5mm,参考如下图2所示,可满足小型化设计需求;
图2:电安科技慢熔保险丝SF303A001封装尺寸示意图
2、常温25℃条件下的正常冷却阻值低至0.128Ω,自损耗很小;
3、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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