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KUU K1812L300/12DR
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- KUU K1812L300/12DR
- Type
- KUU
- Minimum package
- 1500 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- KUU
- Electronic Component
- K1812L300/12DR
- Electronic Component
- 1
- Electronic Component
- 3.41mm
- Package
- 1812
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.085g
- Electronic Component
- 4.73mm
- Electronic Component
- 1mm
- Electronic Component
- 1
- Electronic Component
- 5s
- Electronic Component
- BM0258756621
- Operating Temperature
- 20℃~+85℃
- Voltage Rating(Vmax)
- 12V
- Power(Pd)
- 1.2W
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
K1812L300/12DR 产品概述
一、产品简介
K1812L300/12DR 是 KUU 品牌的一款 1812 封装表面贴装自恢复高分子PTC（聚合物正温度系数）过流保护元件。该器件在正常工作时呈低电阻，遇到过流或过热时阻值迅速上升以限制电流并保护电路，过热或故障消除后可恢复原有阻值，适用于中低压、需要重复保护的电子产品防护场合。
二、主要电气参数
- 最大耐压 Vmax：12 V
- 最大允许短时电流 Imax：100 A（短时浪涌承受能力）
- 保持电流 Ihold：3 A（在规定温度下长期通过而不触发）
- 跳闸电流 Itrip：6 A（典型触发电流）
- 功耗 Pd：1.2 W（在指定条件下的能量耗散）
- 初始态阻值 Rmin：12 mΩ（常温未触发时）
- 跳断后阻值 R1max：60 mΩ（触发后典型升阻值）
- 动作时间：约 5 s（由 Itrip 激活到显著升阻）
- 工作温度范围：-20 ℃ ~ +85 ℃
以上参数为典型值与规格上限，具体应用中应参考厂方完整数据表并考虑环境与热耦合影响。
三、机械与封装信息
- 封装类型：1812（表面贴装）
- 外形尺寸：长度 4.73 mm × 宽度 3.41 mm × 厚度 1.00 mm
该紧凑封装便于 SMT 贴装流程与自动化生产，适配常见 1812 封装焊盘布局。
四、主要特性与优势
- 低初始电阻：12 mΩ 的低导通阻抗，降低正常工作时的功率损耗与发热。
- 可重复保护：触发后自动恢复，适合需频繁容错的设备。
- 高浪涌承受：可承受高达 100 A 的短时浪涌，适合启动电流或瞬态过流场合。
- 紧凑可焊接：1812 尺寸利于空间受限的产品设计与标准化生产。
五、典型应用场景
- 手机、平板、便携式设备的充电接口与电源线保护；
- 汽车电子 12 V 辅助电路的过流保护（需结合热耦合考虑环境温度）；
- 电池组、DC-DC 转换器输入侧的短路与过流防护；
- 家用与工业低压电源模块的线路保护与器件保护。
六、选型与使用注意
- 严格根据工作电压与环境温度选型：本件适用最高 12 V 的直流电路。
- 对 Imax（100 A）应理解为短时浪涌能力，长期电流不得超过 Ihold（3 A）。
- 布局时尽量靠近被保护源（例如电源输入端）并保证良好散热路径，避免温升误触发。
- 兼容常见 SMT 回流焊，但建议参考厂家回流焊工艺曲线及湿热、潮湿处理规范以保证可靠焊接。
- 存储与操作避免机械冲击与超出规格的温湿度环境，长期高温会改变触发特性。
总结：K1812L300/12DR 以其低阻抗、可重复自恢复和高浪涌承受能力，适合各类需紧凑封装与可恢复过流保护的电子设备。选用时务必结合实际工作电流、环境温度与热布局进行合理设计与验证。
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