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BHFUSE BSMD2920-400-24V BSMD2920
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BHFUSE BSMD2920-400-24V
- Type
- BHFUSE
- Minimum package
- 1500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BHFUSE
- Electronic Component
- BSMD2920-400-24V
- Electronic Component
- 1
- Electronic Component
- 5.44mm
- Package
- 2920
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.181g
- Electronic Component
- 7.98mm
- Electronic Component
- 1.6mm
- Electronic Component
- 1
- Electronic Component
- 4s
- Electronic Component
- BM0226544153
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 24V
- Power(Pd)
- 2W
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BSMD2920-400-24V 产品概述
一、产品简介
BSMD2920-400-24V 是佰宏（BHFUSE）出品的一款表面贴装自恢复保险丝（PolySwitch 类似器件），封装为 2920（实测长度 7.98mm、宽度 5.44mm、高度 1.6mm）。器件在正常工作时呈低电阻状态，遇过流会跳闸并升高阻值以限制电流，故障解除后可自动冷却恢复到初始状态，适合电源保护与短路保护应用。
二、主要电气参数
- 初始态阻值 Rmin：8 mΩ
- 跳断后最大阻值 R1max：40 mΩ
- 耐压 Vmax：24 V
- 跳闸电流 Itrip：8 A（典型或标称）
- 保持电流 Ihold：4 A
- 最大允许电流 Imax：40 A
- 耐功耗 Pd：2 W
- 工作温度范围：-40 ℃ ~ +85 ℃
- 封装型号：2920，品牌：BHFUSE（佰宏）
三、关键特性与工作原理
该自恢复保险丝在通过正常电流时表现为极低的导通电阻（约 8 mΩ），可有效降低功率损耗。当电流超过 Itrip 时，聚合物或金属化复合材料迅速升温、内部电阻显著上升（跳闸后可达 40 mΩ），从而限制过流并保护下游电路。故障解除并冷却后器件会恢复低阻态，无需更换，适合反复出现短时过流或浪涌保护需求的场合。
四、典型应用场景
- USB/接口电源保护（5V~24V 系统）
- 电池管理与充电保护（便携设备、移动电源）
- 消费电子与家用电器的电路保护
- 工业控制与通信设备的局部过流保护（需注意系统浪涌与瞬态）
注：器件耐压上限 24V，应用于更高电压环境需并联或配合其他保护元件。
五、封装与安装建议
BSMD2920-400-24V 为 SMD 型元件，建议采用对应 2920 封装的 PCB 炉温回流工艺焊接，焊盘设计与焊膏量应参考厂商数据手册以保证焊接可靠性。工作环境温度影响跳闸特性，布局时应考虑周围热源和散热条件。出于长期可靠性，建议按制造商推荐的储存与湿度控制要求处理器件。
六、选型与注意事项
- 选型时 Ihold 应大于电路正常工作最大持续电流，Itrip 应小于可接受的危险电流；通常留有一定裕量以避免误触发。
- 对于存在大幅瞬态浪涌（如电机启动）的场合，需评估器件承受能力或采用限流/缓启动措施。
- 在 24V 较高电压或强干扰环境中，建议与 TVS 二极管、RC 抑制网络等配合使用增强瞬态抑制能力。
- 购买与设计前请向佰宏索取完整数据手册（包括典型热时程曲线、推荐焊盘尺寸与回流曲线）以确认最终方案。
如需封装尺寸图、热特性曲线或 PCB 样板（footprint）建议，可以提供进一步资料以便设计参考。
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