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UNI-ROYAL 0805W8J0470T5E
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- UNI-ROYAL 0805W8J0470T5E
- Type
- UNI-ROYAL
- Minimum package
- 5000 圆盘
Technical parameters
- Power
- 125mW
- Electronic Component
- Electronic Component
- Electronic Component
- UNI-ROYAL
- Electronic Component
- 0805W8J0470T5E
- Electronic Component
- 1
- Package
- 0805
- Electronic Component
- SMD Resistor
- Electronic Component
- ±5%
- Electronic Component
- 0.027g
- Electronic Component
- 47Ω
- Electronic Component
- 1
- Electronic Component
- BM0257341838
- Operating Temperature
- 55℃~+155℃
- Operating Voltage
- 150V
- Electronic Component
- ±100ppm/℃
- Resistor Type
- Resistor
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
0805W8J0470T5E 产品概述
一、产品概述
0805W8J0470T5E 为 UNI-ROYAL（厚声）系列厚膜贴片电阻，标准 0805 封装（公制 2012，约 2.0 × 1.25 mm）。标称阻值 47Ω，精度 ±5%（J），额定功率 125 mW（1/8W 级别），工作电压标称 150 V，温度系数 ±100 ppm/℃，工作温度范围 -55℃ 至 +155℃。该器件定位为通用型、成本效益高的表面贴装电阻，适用于大批量电子产品的标准阻值需求。
二、主要技术参数
- 电阻类型：厚膜电阻
- 阻值：47 Ω ±5%
- 额定功率：125 mW（室温）
- 额定工作电压：150 V（器件耐压等级）
- 温度系数（TCR）：±100 ppm/℃
- 工作温度：-55 ℃ ~ +155 ℃
- 封装：0805（2012 公制）
- 品牌：UNI-ROYAL（厚声）
三、电气与热性能说明
额定功率 125 mW 是在规定环境温度下的最大耗散能力。根据 P = V^2 / R 与 P = I^2 · R，可计算出该阻值在不超过额定功率条件下的实际电压与电流上限：
- 最大允许电压（由功率限制）：Vmax ≈ √(P·R) ≈ √(0.125×47) ≈ 2.42 V
- 最大允许电流：Imax ≈ √(P / R) ≈ √(0.125/47) ≈ 51.6 mA
因此“工作电压 150 V”为器件耐压能力指标，不代表在 47Ω 应用时可直接施加该电压。使用时必须同时满足电压、电流与功率三方面约束，避免过载发热导致漂移或失效。
四、封装与可靠性
0805 封装适配常见贴片生产工艺，支持标准回流焊工艺（具体温度曲线请参照厂商回流说明）。厚膜工艺具有良好的机械强度和焊接可靠性，适合消费电子、工业控制等场景。工作温度范围宽，能在较苛刻环境下长期使用，但高温环境下应按厂商功率降额曲线进行降额设计以提升可靠性。
五、典型应用场景
- 通用电路的限流、分压与偏置网络
- 信号链中的串联阻抗或匹配元件（低功率场合）
- 电源板上作低功率取样、旁路或限流保护（需满足功耗限制）
- 工业与消费类电子的批量生产 BOM 替代件
六、选型与使用建议
- 在电路设计中以功率限制为首要判断标准：对 47Ω 器件应保证实际电压不超过约 2.4 V，电流不超过约 51 mA，或按系统温度降额选型。
- 若电压或功耗接近极限，建议选用更大功率或更高阻值分压方案以保证余量。
- 贴装与回流焊按厂商推荐曲线执行，避免过热或快速冷却引起机械应力。
- 对关键应用可参考厂商完整数据手册获取脉冲特性、湿热和焊接可靠性试验数据，以确认长期可靠性。
总结：0805W8J0470T5E 为一款通用型厚膜 47Ω 贴片电阻，适合大量普通功耗与信号场合使用。在电路设计中应优先考虑功率与温升约束，结合厂商提供的降额与可靠性资料以获得稳定的长期性能。
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