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Sunlord SWPA4020S330MT
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Sunlord SWPA4020S330MT
- Type
- SUNLORD
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- SUNLORD
- Electronic Component
- SWPA4020S330MT
- Electronic Component
- 1
- Package
- SMD,4x4mm
- Electronic Component
- Power Inductor
- Electronic Component
- ±20%
- Electronic Component
- 0.008g
- Inductor
- 33uH
- Electronic Component
- 1
- Electronic Component
- BM0258491056
- Current
- 490mA
- Resistor(DCR)
- 715mΩ
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
- and Current(Isat)
- 850mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SWPA4020S330MT 产品概述
一、产品简介
SWPA4020S330MT 是顺络（Sunlord）推出的一款功率型贴片电感，封装为 SMD，外形尺寸 4×4 mm，标称电感值 33 μH（公差 ±20%）。器件针对空间受限且需处理中低电流的电源滤波和储能应用设计，具有较高的饱和电流能力，适合便携式设备和小功率开关电源场合。
二、主要参数与电气特性
- 电感值：33 μH，公差 ±20%。设计时需考虑最大偏差对振荡频率与纹波抑制的影响。
- 额定电流（Irated）：490 mA（连续工作时推荐不超过此值以控制温升与电感下降）。
- 饱和电流（Isat）：850 mA（在此电流附近电感将显著下降，非线性效应明显，短时通流时需注意）。
- 直流电阻（DCR）：715 mΩ。由此可估算损耗：在额定电流下损耗约为 P = I^2·R ≈ 0.49^2×0.715 ≈ 0.17 W；在饱和电流 0.85 A 时损耗约 0.52 W，须注意可能的发热与温升。
注：更详细的频率响应、自谐频率（SRF）、温度特性请参照厂商数据手册。
三、典型应用与选型建议
- 典型应用：降压/升压 DC‑DC 开关电源滤波与储能、输入/输出滤波器、LED 驱动、便携式设备电源管理等。
- 选型建议：若为连续负载，应保留一定裕量，通常将工作电流控制在额定电流以下（建议 70–90% Irated）以减少温升与避免进入饱和区。若存在短时冲击电流，可参考 Isat 判断抗饱和能力，但勿长期在 Isat 附近工作。
- 公差影响：±20% 公差对谐振与滤波性能影响较大，若对精度敏感应选择更精密规格或在电路中留有调整余地。
四、PCB 布局与可靠性注意事项
- 布局：尽量将电感与开关元件（MOSFET、二极管）以及输入/输出电容紧密布置，缩短高频回路环路，降低 EMI。
- 散热：DCR 较大时将产生较明显的 I^2R 损耗，需为周边铜箔提供足够散热路径；必要时评估热仿真或实测温升。
- 焊接与可靠性：遵循厂家推荐的回流焊温度曲线进行贴装；避免过度机械应力，注意板边距与固定方式以防震动疲劳。元件是否符合 RoHS、寿命与温度循环能力请核对官方可靠性报告。
五、常见问题与工程估算
- 电感在大直流偏置下会下降，设计时以最低可接受电感值考虑滤波/环路稳定性。
- 当需估算功耗与温升，可用 DCR 与预计最大连续电流计算 I^2R 损耗，结合 PCB 散热条件判断是否需要降额使用。
- 若电路对自谐频率或高频损耗敏感，应向顺络索取完整频率特性曲线或样片做实测。
结论：SWPA4020S330MT 适用于中低电流、空间受限且对抗饱和能力有一定要求的电源滤波与储能场合。最终选型与可靠性验证请结合厂商数据手册与样品测试。
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