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BHFUSE BSMD1812-300-12V BSMD1812
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BHFUSE BSMD1812-300-12V
- Type
- BHFUSE
- Minimum package
- 1500 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BHFUSE
- Electronic Component
- BSMD1812-300-12V
- Electronic Component
- 1
- Electronic Component
- 3.41mm
- Package
- 1812
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.13g
- Electronic Component
- 4.73mm
- Electronic Component
- 1.5mm
- Electronic Component
- 1
- Electronic Component
- 4s
- Electronic Component
- BM0228072380
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 12V
- Power(Pd)
- 1.2W
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BSMD1812-300-12V 产品概述
本产品为 BHFUSE（佰宏）出品的表面贴装可复位过流保护器件（BSMD1812-300-12V），采用1812封装，专为12V工作电压系统设计，提供可靠的过流保护与重复使用能力，适用于通信、工业控制、储能管理及一般12V电子设备的短路/过流保护。
一、主要参数
- 额定耐压（Vmax）：12V
- 最大电流（Imax）：100A（瞬态承受能力）
- 保持电流（Ihold）：3A（长期不动作的最大稳态电流）
- 跳闸电流（Itrip）：6A（在指定条件下开始进入高阻态的参考电流）
- 功耗（Pd）：1.2W（在额定条件下的功耗参考）
- 初始态阻值（Rmin）：10mΩ（器件冷态、正常工作时低阻值）
- 跳断后阻值（R1max）：50mΩ（动作后维持在高阻态的最大阻值）
- 动作时间：4s（在约定过流倍数下达到保护状态所需时间）
- 工作温度：-40℃ 至 +85℃
- 外形尺寸：长 4.73mm × 宽 3.41mm × 高 1.5mm（符合1812封装规范）
二、性能特点
- 低初始电阻，导通损耗小，适合对压降敏感的12V系统。
- 明确的保持电流与跳闸电流窗口，便于系统设计留有合适裕量。
- 可复位设计：过流解除后器件自动恢复至低阻态，降低维护成本。
- 小型SMD封装，便于自动化贴装和高密度布板。
- 宽工作温度范围，满足多数工业与民用应用环境。
三、典型应用场景
- 汽车电源子系统（仪表、车载设备需验证环境要求）
- 通信设备与基站电源保护
- 工控电源模块、PLC外围保护
- 电池管理与移动电源保护系统
- 家用电器与消费类电子的短路/过流防护
四、设计与使用建议
- 设计时应将额定保持电流（Ihold）作为长期工作电流上限，并留有至少20%~50%裕量以避免误动作。
- 对于可能出现大冲击电流的应用，考虑器件的最大瞬态承受能力（Imax）及布局的热散发。
- 放置位置应避免靠近持续高温元件，并保证良好散热与气流。
- 在实际产品中建议做过流与热环境下的验证（打样测试），确认动作时间与阻值变化满足系统安全需求。
- 选型替换时注意1812封装一致性及电气参数匹配，避免直接替代不同动作曲线的型号。
五、可靠性与合规
器件在-40℃~+85℃范围内性能稳定，重复动作后阻值回到低阻态，适合需要多次保护动作的场景。对于关键安全应用，建议配合系统级保护（例如熔断器、限流电路）共同使用以提升总体可靠性。
总结：BSMD1812-300-12V凭借小型化封装、明确的Ihold/Itrip参数和可复位特性，是12V系统中可靠且经济的过流保护方案。欲获取详细电气曲线（I-t特性、热阻、最大回流温度等）或批量采购信息，可提供进一步支持。
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