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BHFUSE BSMD0805L-200 BSMD0805L
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BHFUSE BSMD0805L-200
- Type
- BHFUSE
- Minimum package
- 4000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BHFUSE
- Electronic Component
- BSMD0805L-200
- Electronic Component
- 1
- Electronic Component
- 1.8mm
- Package
- 0805
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.033g
- Electronic Component
- 2.5mm
- Electronic Component
- 1mm
- Electronic Component
- 1
- Electronic Component
- 8s
- Electronic Component
- BM0226580898
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 6V
- Power(Pd)
- 1W
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BSMD0805L-200 产品概述
一、产品简介
BSMD0805L-200 是佰宏（BHFUSE）推出的一款 0805 封装自恢复保险丝（PPTC），用于对低电压电源线路与口线提供过流、短路保护。器件体积小、响应稳定、可在故障解除后自动复位，适配表面贴装 SMT 生产流程，适合消费电子、通信与便携设备等场景。
二、主要参数
- 尺寸（封装）：0805，长×宽×高 = 2.5 mm × 1.8 mm × 1.0 mm
- 额定电压 Vmax：6 V
- 保持电流 Ihold：2 A（器件在正常工作时应小于此值）
- 跳闸电流 Itrip：4 A（典型）
- 最大/冲击电流 Imax：50 A（短时允许峰值）
- 初始电阻 Rmin：4 mΩ（未动作状态）
- 跳断后阻值 R1max：45 mΩ（动作后恢复态阻值上升）
- 动作时间：约 8 s（在接近跳闸电流条件下典型动作时间）
- 功率耗散 Pd：1 W（额定耗散功率）
- 工作温度范围：-40 ℃ ～ +85 ℃
三、工作原理与电气特性
该器件为聚合物自恢复保险丝（PPTC），在正常电流下保持低阻（约 4 mΩ），当电流超过跳闸阈值并持续一定时间时，内部温度上升引起阻值迅速增大（动作后阻值可达 ≤45 mΩ），从而限制电流保护下游电路。短时冲击电流可承受到 50 A，但长期通过应受限于 Ihold 与 Pd。动作时间受环境温度、线路散热与超流幅值影响。
四、封装与安装
0805 表贴封装，兼容常规回流焊工艺。建议贴片时靠近被保护电源入端/ connector 处安装以缩短保护回路路径；焊盘热量设计应兼顾焊接可靠性与过流时的热散逸。使用标准 0805 焊盘尺寸并遵循厂商回流曲线。
五、典型应用
- USB、Type-C 和其他低压外设接口过流保护
- 电池保护与充电管理系统的输入侧保护
- LED 驱动、便携式设备主电源保护
- 通信设备和模块的电源分支保护
六、设计与选型注意事项
- 选择 Ihold 要大于正常工作电流，且 Itrip 应高于设备瞬态启动电流以避免误动作；若有大启动浪涌，需评估 Imax 能否承受短时峰值。
- 工作环境温度对 Ihold/ Itrip 有显著影响，高温下保持电流会降低，应按最高环境温度下的性能留有余量。
- 电压等级 6 V 适用于低压系统，若系统电压更高需选用更高耐压器件。
- 动作后阻值上升可能引起电压降，需评估对下游电路的影响。
七、可靠性与测试建议
在量产前建议完成：初始及动作后电阻测试、保持/跳闸电流测试、反复复位循环测试、环境温度与湿热老化测试以及焊接热稳性验证。对关键产品可开展过流下降曲线（I–t）和短路承受能力的系统级评估。
总结：BSMD0805L-200 以小尺寸、高承受峰值和自动复位特性，适用于多种低压短路/过流保护场景。正确的选型与布局、以及针对工作温度与浪涌的验证，可确保系统保护可靠且稳定。
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