Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
TA-I Technology RLH12FTCR220
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- RLH12FTCR220
- Type
- 1206
- Minimum package
- 5000 圆盘
Technical parameters
- Power
- 1W
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- RLH12FTCR220
- Electronic Component
- 1
- Package
- 1206
- Electronic Component
- Current Sense Resistor / Shunt
- Electronic Component
- ±1%
- Electronic Component
- 0.03g
- Electronic Component
- 220mΩ
- Electronic Component
- 1
- Electronic Component
- BM0264549216
- Electronic Component
- SMD
- Electronic Component
- ±100ppm/℃
- 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.
RLH12FTCR220 产品概述
一、产品简介
RLH12FTCR220 是大毅科技推出的一款高稳定性贴片采样电阻（分流器），阻值 220 mΩ，精度 ±1%，额定功率 1W，温度系数 ±100 ppm/℃，封装为通用的 1206。针对精确电流检测与能量管理场景优化设计，适合 SMT 流程批量生产与可靠的长期运行。
二、主要性能参数
- 阻值：220 mΩ（0.22 Ω）
- 精度：±1%（初始容差）
- 额定功率：1W（环境与 PCB 散热相关）
- 温度系数：±100 ppm/℃（即 0.01%/℃）
- 封装：1206（适配常见贴片工艺）
- 安装方式：贴片（SMD）
- 品牌：大毅科技
三、电气特性与计算
- 电压降：V = I × R
- 功耗：P = I^2 × R（或 P = V × I）
- 连续最大电流（理论）：I_max = sqrt(1W / 0.22Ω) ≈ 2.13 A。为提高可靠性建议按 80% 退载使用，即约 1.9 A。
- 温度漂移：每升高 1℃，阻值理论变化约 100 ppm（0.01%）；例如环境升高 50℃，阻值变化约 0.5%。
四、典型应用场景
- 电池管理系统（BMS）电流测量
- 开关电源与 DC-DC 转换器电流检测
- 电机驱动与电流保护回路
- 充电设备与便携式电子产品的电流监测
- 过流检测与能耗统计
五、PCB 布局与散热建议
- 建议将采样电阻焊接在大面积铜箔上，以帮助散热并保证额定功率输出。
- 为降低测量误差，尽量缩短电流回路的走线并避免通过敏感信号层。
- 如需高精度测量，可在 PCB 上采用 Kelvin（四端）测量法或将放大器采样引脚靠近电阻端点布线。
- 对于脉冲大电流场景，参考脉冲功率与循环次数，避免持续超过额定功率。
六、选型与可靠性测试
- 精度 ±1% 适合中高精度电流检测；若需更高精度，建议选用更低阻值或四端低温漂分流器。
- 建议进行的可靠性测试：初始阻值 4 线测量、温升测试、热循环、焊接可靠性与寿命评估。
- 生产工艺兼容回流焊，按厂商推荐的回流曲线进行焊接。
RLH12FTCR220 在小体积（1206）条件下，提供较高功率密度与稳定的温漂特性，适用于对成本、体积及可靠性有平衡需求的电流采样应用。若需 PCB 参考封装尺寸或更详细的热阻/功率曲线，可向大毅科技索取规格书与应用建议。
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