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BHFUSE BSMD0805-020-24V BSMD0805
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BHFUSE BSMD0805-020-24V
- Type
- BHFUSE
- Minimum package
- 5000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BHFUSE
- Electronic Component
- BSMD0805-020-24V
- Electronic Component
- 1
- Electronic Component
- 1.5mm
- Package
- 0805
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.027g
- Electronic Component
- 2.2mm
- Electronic Component
- 0.9mm
- Electronic Component
- 1
- Electronic Component
- 20ms
- Electronic Component
- BM0228072319
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 24V
- Power(Pd)
- 500mW
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BSMD0805-020-24V 自恢复保险丝（BHFUSE 0805）产品概述
一、产品简介
BSMD0805-020-24V 是 BHFUSE（佰宏）推出的一款微型自恢复聚合物保险丝（PPTC），采用 0805 表贴封装，尺寸长 2.2mm、宽 1.5mm、高 0.9mm。产品用于电路过流、短路保护，触发后自动恢复，无需更换，有利于提高系统可靠性并降低维护成本。
二、主要参数
- 耐压（Vmax）：24V
- 最大电流（Imax）：40A（瞬态承受能力）
- 保持电流（Ihold）：200mA（长期电流下不动作）
- 跳闸电流（Itrip）：500mA（在规定条件下动作）
- 消耗功率（Pd）：500mW
- 初始态阻值（Rmin）：500mΩ
- 跳断后阻值（R1max）：3.5Ω
- 动作时间：20ms
- 工作温度：-40℃ ~ +85℃
- 封装：0805（SMD）
三、产品特点与优势
- 微型封装、体积小、适合高密度 PCB 布局。
- 自恢复功能：过载或短路消除后自动恢复导通，支持重复保护循环。
- 响应快速（动作时间约 20ms），能有效保护敏感负载。
- 初始低内阻（≥500mΩ），正常工作时压降小，功耗低。
- 通过设计可承受短时高峰电流（Imax 40A），增强对瞬态冲击的耐受性。
- 工作温度范围宽，适用于工业级环境（-40℃～+85℃）。
四、典型应用场景
- USB 及外设端口过流保护（单端电压 ≤24V）。
- 电池管理与充电器保护（中低压系统）。
- 工业控制、通信设备、便携电子及消费类产品的电源输入保护。
- 需要自动复位特性的保护场合，减少人工维护。
五、使用与布局建议
- 推荐按厂商数据手册提供的 0805 焊盘尺寸和回流焊工艺进行装配，确保良好热传导与机械可靠性。
- 将器件靠近被保护电源输入或负载侧放置，以缩短保护路径、提高保护效率。
- 对于持续接近 Ihold 的工作电流，应留有裕量，避免长期处于高温导致误动作或寿命下降。
- 若电路存在较大浪涌或反复短路，应评估是否需并联其它限流/缓冲措施（如 NTC 或限流电阻）以减少频繁跳闸。
- 在高环境温度下应做温度补偿和降额设计，保证动作点稳定。
六、可靠性与注意事项
- 本器件在多次跳闸后阻值会升高（跳断后 R1max 可达 3.5Ω），频繁过载可能影响恢复后的电性能。
- 不适合用于要求精确限流或作为熔断型一次性保护替代品；对长时间短路或高能量冲击须额外保护手段。
- 选型时以实际工作电流、环境温度及浪涌特性为依据，必要时参考 BHFUSE 官方技术手册和曲线图，并与供应商沟通确认。
总结：BSMD0805-020-24V 以其紧凑封装、快速响应与可自恢复的特性，适合多种 24V 及以下电源保护场景。在设计中注意热、频繁跳闸和安装细节，可以发挥其稳定可靠的保护作用。
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