【选型】制氧机交流电源输入过流保护设计推荐力特快熔保险丝0216005.MXP，过多种安规认证

时间： 2021-06-17 来源：世强

技术问答

国外疫情状况下对制氧机的需求与日俱增，为保证制氧机电源输入过流防护满足欧美出口要求，一般需要一款通过3C、UL，VDE，CE等安规认证的保险丝放于交流电源输入做防护，此保险丝选型因素参考如下：

1、额定电压考量：电源输入一般为110VAC或220VAC，纹波电压一般为±10%，建议选择耐压大于242VAC以上保险丝即可，满足设计兼容；

2、额定电流考量：额定输入电流一般为2.5A，以2倍过流考量，建议选择额定工作电流为5A的保险丝；

3、通过UL，VDE，CE等安规认证；

针对如上的设计需求，推荐选择LITTELFUSE（力特）5x20mm玻璃管快熔保险丝 0216005.MXP，不带引线，最大额定工作电压250VAC，额定工作电流5A，分断电流能力达1500A@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：Littelfuse（力特）快熔保险丝0216005.MXP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0.0183Ω，自损耗很小；

3、通过UL，VDE，CE等安规认证，满足出口安规认证要求；

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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