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RUILON SMD2920P185TF
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- RUILON SMD2920P185TF
- Type
- RUILON
- Minimum package
- 1500
Technical parameters
- Electronic Component
- RUILON
- Electronic Component
- SMD2920P185TF
- Electronic Component
- 1
- Electronic Component
- 5.44mm
- Package
- 2920
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.196g
- Electronic Component
- 7.98mm
- Electronic Component
- 1.4mm
- Electronic Component
- 1
- Electronic Component
- 2.5s
- Electronic Component
- BM0228172233
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 33V
- Power(Pd)
- 1.5W
- Current(Imax)
- 40A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMD2920P185TF 产品概述
一、产品简介
SMD2920P185TF（RUILON 瑞隆源）是一款表面贴装型自恢复保险丝（PTC resettable fuse），额定保持电流1.85A，耐压33V，封装为2920（尺寸近似 2.9×2.0mm 型系但本器件实际外形为长7.98mm、宽5.44mm、高1.4mm 的SMD封装）。该器件针对过流保护设计，可在过载时自动跳闸并在故障消除后自恢复，适用于便携式设备与车规类低压电源保护。
二、主要规格参数
- 品牌：RUILON（瑞隆源）
- 型号：SMD2920P185TF（描述：33V 1.85A 2920自恢复）
- 额定保持电流（Ihold）：1.85 A
- 跳闸电流（Itrip）：3.7 A
- 最大持续电流（Imax）：40 A
- 最高工作电压（Vmax）：33 V
- 初始态阻值（Rmin）：30 mΩ
- 跳断后阻值（R1max）：150 mΩ
- 功耗（Pd）：1.5 W
- 动作时间：2.5 s
- 工作温度范围：-40 ℃ ~ +85 ℃
- 外形尺寸：长度 7.98 mm，宽度 5.44 mm，高度 1.4 mm
- 封装：2920
三、工作原理与性能特点
本器件基于聚合物正温度系数（PTC）材料制成，常态下阻值低，允许额定电流通过；当电流超出安全值或长期过载导致温度上升时，材料电阻显著增大，限制电流达到保护目的。故障解除且器件冷却后，阻值恢复至初始低阻状态，实现多次自恢复保护。特点包括响应及时、可复用、无需更换、安装方便、对短路和过流有良好抑制能力。
四、典型应用场景
- 便携式消费电子（平板、笔记本供电保护）
- 通信设备与路由器电源保护
- 汽车低压辅助电路（注意匹配环境温度及电流）
- 工控模块与电源板端口保护
- USB、充电与LED驱动等接口防护
五、封装与热机械特性
2920封装形式适合自动贴装与回流焊工艺。器件热耗散能力受PCB散热面与铜箔面积影响，建议在设计时预留适当散热区及焊盘以保证功耗1.5W条件下可靠工作。工作温度范围-40~+85℃，适应一般工业环境。
六、选型与使用建议
- 保持电流（Ihold）应大于实际工作持续电流；峰值或启动浪涌电流若接近Itrip，应考虑余量或采用并联/更高规格器件。
- PCB布局应加大焊盘和散热铜箔，以降低器件温升并保证动作一致性。
- 若需在更高电压或更大浪涌条件下使用，应选择额定更高Vmax或更大Itrip型号。
七、可靠性与测试要点
建议进行过流、短路行为、温升测试以及多循环自恢复寿命验证，关注跳闸后R1max（≤150 mΩ）与恢复后的Rmin（≥30 mΩ）变化，确保长期稳定性与一致性。
八、包装与订购信息
标准SMD贴装卷盘包装，适配自动化贴片生产线。订购请注明完整型号 SMD2920P185TF 及所需数量，并向供应商确认最小订购单位与交期。
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