【选型】力特快熔保险丝用于储能PCS控制器电源输入过流防护设计，分断电流能力达50A

时间： 2023-01-14 来源：世强

技术问答

为避免储能PCS控制器电源输入因负载短路异常造成燃烧或爆炸风险，一般需要在电源输入加一款快熔保险丝设计，选型因素参考如下：

1、额定工作电压：一般12VDC供电，同时，为兼容24VDC供电，以2倍过压考量，一般选择耐压至少48VDC保险丝即可；

2、额定工作电流：电源输入电流一般3.3A左右，以1.5倍过流防护，建议选择5A的保险丝设计即可；

3、小尺寸。

针对如上设计需求，推荐LITTELFUSE（力特）特快熔保险丝 0453005.MR，最大额定工作电压125VDC，在环境温度25℃条件下，额定工作电流5A，分断电流能力达50A，工作温度范围-55℃~125℃，通过UL、CSA认证，典型电性参数参考如下图1所示。

图1：Littelfuse（力特）快熔保险丝0453005.MR典型电性参数

推荐理由如下：

1、分断电流能力达50A@125Vdc，具有高的安全切断电流能力；

2、采用2410表贴封装，典型尺寸仅6.1x2.69mm，占板空间少，满足小型化设计需求；

3、采用镀金保险丝帽设计，提供更小的接触电阻和高抗氧化性能，增加实际环境实用寿命。

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