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BOURNS MF-R010是一款径向插件式聚合物正温度系数(PTC)自恢复保险丝,专为低压小电流电路的过流保护设计。区别于一次性保险丝,其核心优势在于过流故障排除后自动复位,无需手动更换,可长期重复使用,有效降低电路维护成本与 downtime。产品主要用于防止负载、电源模块因过流(如短路、过载)损坏,是消费电子、通信、工业控制等领域的可靠防护器件。
MF-R010的核心参数明确了其适用场景与防护边界,具体如下:
参数项 规格值 技术意义 最大耐压(Vmax) 60V 直流/交流电路中允许的最高工作电压,超过则可能被击穿,需严格匹配电路电压 最大浪涌电流(Imax) 40A 瞬间可承受的最大浪涌电流(如开机尖峰、静电放电),不触发保护 保持电流(Ihold) 100mA(25℃) 常温下电路正常工作允许的最大持续电流,低于此值时保险丝保持低阻导通 跳闸电流(Itrip) 200mA(25℃) 触发保护的最小电流,电流达到此值时,保险丝会在规定时间内跳断 动作时间 4s(Itrip下) 电流达到200mA时,4秒内完成电阻急剧增大(跳断),及时切断过流路径 初始态阻值(Rmin) 2.5Ω 常温未触发时的最小电阻,确保电路正常导通时损耗低、压降小 跳断后阻值(R1max) 7.5Ω 触发保护后的最大电阻,将电路电流限制在安全范围(通常<1mA) 消耗功率(Pd) 380mW 正常工作时的功率损耗,低损耗不影响电路整体效率 工作温度范围 -40℃~+85℃ 宽温适应户外、工业、车载等复杂环境,无需额外温控措施MF-R010采用径向插件封装,引脚设计符合传统PCB焊接工艺,无需特殊贴装设备,适合批量生产与手工焊接。封装体积小巧(典型尺寸约φ5×10mm,参考同类产品),机械强度可靠,抗振动、冲击性能满足IEC 60068等标准,可适应车载、工业设备的振动环境。
PTC材料由聚合物基体与导电填料(如炭黑)复合而成:
MF-R010的参数匹配低压小电流电路,典型应用包括:
为确保防护效果与可靠性,需注意以下要点:
BOURNS MF-R010 PTC自恢复保险丝凭借稳定的电气性能、宽温适应性与自恢复特性,成为低压小电流电路过流保护的高性价比选择。其在消费电子、通信、工业等领域的广泛应用,有效提升了电路的安全性与可靠性,降低了维护成本。
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