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BHFUSE BSMD0805-100-12V BSMD0805
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BHFUSE BSMD0805-100-12V
- Type
- BHFUSE
- Minimum package
- 4000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BHFUSE
- Electronic Component
- BSMD0805-100-12V
- Electronic Component
- 1
- Electronic Component
- 1.5mm
- Package
- 0805
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.032g
- Electronic Component
- 2.2mm
- Electronic Component
- 1.2mm
- Electronic Component
- 1
- Electronic Component
- BM0225978006
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 12V
- Power(Pd)
- 600mW
- Current(Imax)
- 40A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BSMD0805-100-12V 产品概述
一、产品简介
BSMD0805-100-12V 是佰宏（BHFUSE）出品的一款0805封装自恢复保险丝（聚合物熔断器，PTC）。器件体积小、响应快、可在故障解除后自动恢复导通，适合板级过流保护与短路保护场景。典型应用包括便携设备、电源接口、USB/通信线、摄像头模组与物联网终端等。
二、主要参数与电气特性
- 保持电流 (Ihold)：1A（正常工作时不触发）
- 跳闸电流 (Itrip)：2A（在此电流附近器件进入高阻态）
- 最大额定电压 (Vmax)：12V
- 初始态阻值 (Rmin)：约40mΩ，低内阻可减少电压降和发热
- 跳断后最大阻值 (R1max)：270mΩ（保护动作后显著增阻，限制电流）
- 最大承受电流 (Imax)：40A（瞬态冲击或浪涌容限，取决于脉冲宽度）
- 功耗 (Pd)：600mW（器件在指定工况下的最大功耗）
- 工作温度：-40℃ ~ +85℃
注：器件的动作与环境温度、PCB散热和脉冲持续时间密切相关，具体曲线请参考厂家曲线图。
三、结构与封装尺寸
- 封装：SMD 0805
- 尺寸（典型）：宽度 1.5 mm，长度 2.2 mm，高度 1.2 mm
适用于常规0805贴片工艺，便于自动贴装与回流焊接。
四、使用建议与选型要点
- 选型原则：将器件的保持电流 Ihold 设定略高于设备正常最大工作电流，确保不会在正常瞬态（如启动浪涌）下误动作；同时使 Itrip 低于可能损坏电路的致命电流。
- 热管理：器件功耗和周围铜箔面积影响升温与动作特性，尽量避免将保险丝置于热源或散热差的位置。
- 浪涌与冲击：Imax 表示器件对短时浪涌的承受能力，但具体能力受脉冲持续时间影响，需按应用脉冲条件确认。
- PCB布局：建议靠近电源输入或保护对象放置，最短引线，便于抑制故障电流；按厂商推荐的焊盘尺寸设计落板，保证焊接可靠性。
- 焊接工艺：兼容常规回流焊（需遵循厂方温度与时间规范），避免反复高温重流导致性能退化。
五、典型应用场景
- USB/通信端口过流保护
- 电池、充电模块及移动设备电源保护
- LED 驱动与显示模块防短路
- 工业控制板与传感器前端保护
六、存储与注意事项
- 存放于干燥、防潮环境，遵循贴片元件常规储运要求；长时间存放前建议按厂方推荐进行烘干处理。
- 不应将自恢复保险丝当作开/关开关使用；长期在接近 Ihold 的条件下工作会导致温升和性能漂移。
- 如遇特殊环境（高温、高湿、强振动），请使用样品验证并咨询厂方提供更详尽的应用曲线和老化数据。
综上，BSMD0805-100-12V 在体积受限的板级电路中提供了可靠的自动复位过流保护，凭借低初始阻值与较高的浪涌承受能力，适合广泛的便携与嵌入式电源保护场合。选择与布局时请结合实际电流波形与环境温度并参考供应商完整数据手册。
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