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TA-I Technology RLP25FEGR040
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- RLP25FEGR040
- Type
- TA-I Technology
- Minimum package
- 4000 圆盘
Technical parameters
- Power
- 3W
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- RLP25FEGR040
- Electronic Component
- 1
- Package
- 2512
- Electronic Component
- Current Sense Resistor / Shunt
- Electronic Component
- ±1%
- Electronic Component
- 0.072g
- Electronic Component
- 40mΩ
- Electronic Component
- 1
- Electronic Component
- BM0264549153
- Electronic Component
- SMD
- Electronic Component
- ±50ppm/℃
- Resistor Type
- Current Sense Resistor
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
RLP25FEGR040 产品概述
一、产品简介
RLP25FEGR040 为大毅科技（Dayi Technology）出品的片式电流采样电阻（分流器），封装为常用的 2512 SMD 型，标称阻值 40 mΩ，额定功率 3W，阻值公差 ±1%，温度系数（TCR）±50 ppm/℃。该器件专为高精度电流检测与功率管理场景设计，兼顾低压降及良好的温度稳定性，适合在空间受限的表贴电路中直接实现电流取样。
二、主要特性
- 阻值：40 mΩ（低阻值，减小电压损耗）
- 功率：3W（2512 封装在良好散热条件下可承受较大连续电流）
- 精度：±1%（初始精度高，便于直接测量或校准）
- 温度系数：±50 ppm/℃（热漂小，长期测量稳定性好）
- 安装方式：贴片（SMD，适合自动化装配）
- 封装：2512（约 6.35 × 3.2 mm，适中尺寸利于散热）
三、典型电气与热性能
- 最大连续电流（理论）：I = sqrt(P/R) ≈ sqrt(3 / 0.04) ≈ 8.66 A（实际使用应按 PCB 散热条件和环境温度进行降额）
- 例：5 A 时压降 V = I·R = 0.2 V，功耗 P = I^2·R = 1.0 W
- 由于为功率耗散型元件，实际允许电流受 PCB 铜箔面积、过孔和周围元件影响，建议在使用中进行热仿真或通过测量确定长期稳定工作点。
四、应用场景
- 电源管理：DC-DC、LDO 负载电流检测
- 电池管理系统（BMS）：充放电采样、SOC 估算
- 电机驱动与逆变器：电流闭环检测与保护
- 通信与服务器电源轨电流监控
- USB/PD、快充保护与限流检测
五、PCB 布线与安装建议
- 将采样电阻放置于电流路径上靠近负载或电源端口，尽量缩短与测量放大器之间的路径。
- 为降低测量误差，尽可能采用四端测量（两个主流端承载电流，两个测量端连接差分放大器）；若器件为两端结构，可在其两侧使用短、粗的测量走线并靠近放大器输入。
- 增大两侧铜箔面积和过孔以增强散热，避免在高功率工况下出现过高结温。
- 推荐遵循厂商回流焊工艺规范，避免机械应力影响电阻长期稳定性。
六、选型与注意事项
- 若系统允许更大压降并追求更低发热，可选择更高阻值或更大功率等级的分流器。
- 注意浪涌电流与脉冲功率能力，短时冲击可能超出连续额定功率，需参考厂家脉冲曲线或做热仿真。
- 长期工作时注意阻值漂移与环境应力，必要时在系统中预留校准或自检机制。
- 采购时确认包装方式（通常为卷带装）与批次一致性，便于量产和替换。
RLP25FEGR040 在精度、热漂与功率密度之间保持了良好平衡，适用于需要可靠电流采样且受空间限制的电源与电池管理设计中。
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