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BOURNS 3266W-1-203LF
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BOURNS 3266W-1-203LF
- Type
- BOURNS
- Minimum package
- 50 管
Technical parameters
- Power
- 250mW
- Electronic Component
- Electronic Component
- Electronic Component
- BOURNS
- Electronic Component
- 12
- Electronic Component
- 3266W-1-203LF
- Electronic Component
- 1
- Package
- Through-hole-3P, 6.4x4.3mm
- Electronic Component
- Resistor / positions
- Electronic Component
- ±10%
- Electronic Component
- 0.7g
- Electronic Component
- 20kΩ
- Electronic Component
- 1
- Electronic Component
- BM0257202355
- Electronic Component
- ±100ppm/℃
- Electronic Component
- Electronic Component
- Electronic Component
- 50
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
3266W-1-203LF 产品概述
一、产品简介
3266W-1-203LF 是 BOURNS 的可调电阻/电位器（插件式，3 引脚），标称阻值 20 kΩ（代码 “203”），初始阻值公差 ±10%，功率额定 250 mW。该器件具有较低的温漂（±100 ppm/℃）和多圈（12 圈）精密调节特点，封装尺寸约 6.4 × 4.3 mm，适合在空间受限的电路中实现精细电阻调节与校准。
二、电气特性要点
- 标称阻值：20 kΩ（±10%）
- 最大耗散功率：250 mW（环境依赖，应按实际散热和温度场合降额使用）
- 温度系数：±100 ppm/℃，即约 ±2 Ω/℃（20 kΩ × 100e-6）
- 多圈：12 圈，便于微调与重复定位
- 引脚：3P（两端 + 中间滑动触点），既可用作电位器（分压器），也可作可变电阻（取一端与滑动端）
三、使用与功率/电压限制计算
为保证可靠性，需注意功率与电压限制：
- 当整体阻值承受满额定功耗时，最大允许电压 Umax ≈ sqrt(P·R) = sqrt(0.25 × 20 000) ≈ 70.7 V
- 最大允许电流 Imax ≈ sqrt(P / R) = sqrt(0.25 / 20 000) ≈ 3.54 mA 注意：在作为变阻器（R 与滑动端并用）时，滑动端与两端之间的功率分配会改变，应减少施加的电压/功率以避免局部过热。
四、典型应用场景
- 模拟电路的偏置/校准，如放大器偏置、滤波器调谐
- 传感器零点/增益微调与现场校准
- 仪器面板的小范围可调设置
- PCB 上的精细电阻调整与出厂校准
五、安装与使用建议
- PCB 安装时预留与封装相匹配的孔位和焊盘，避免机械应力传递到焊点
- 焊接时遵循元件资料的最高温度与时间限制，尽量采用推荐的回流或手工焊接工艺并做好静态冷却
- 在高温环境或靠近热源位置应适当降额（减小允许功率）
- 为保证多圈调节寿命与重复精度，操作时避免过大转矩或频繁超行程
六、选型与注意事项
- 如果需要更高精度或更低温漂，可考虑更高精度（如 ±1%）或更好温漂规格的型号
- 确认实际使用场合的最大电压、电流、温度范围与机械寿命需求，选型时把功率降额余量考虑在内
- “LF” 后缀通常与无铅/可回流焊工艺相关，采购时可与供应商确认是否符合 RoHS/无铅要求
总结：3266W-1-203LF 提供紧凑体积内的 20 kΩ 可调电阻解决方案，12 圈设计适合需要精细微调的应用，但在功率与电压上需注意降额使用以确保稳定可靠。
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