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Littelfuse RF1334-000 RF1334
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Littelfuse RF1334-000
- Type
- LITTELFUSE
- Minimum package
- 2000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- LITTELFUSE
- Electronic Component
- RF1334-000
- Electronic Component
- 1
- Electronic Component
- 3.2mm
- Package
- 1812
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.088g
- Electronic Component
- 5.4mm
- Electronic Component
- 1
- Electronic Component
- BM0231110862
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 60V
- Electronic Component
- Electronic Component
- Electronic Component
- 2000
- Latching Current(Ihold)
- 140mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
RF1334-000 产品概述
RF1334-000 是 Littelfuse（美国力特）生产的一款 1812 封装自恢复保险丝（PPTC），设计用于对低压直流电路的过流和过热保护。器件最大耐压为 60V，保持电流 Ihold 为 0.14A（140mA），在过载跳断后阻值上升至最大 6Ω，以限制故障电流，复位后初始态阻值约 1.5Ω。工作温度范围为 -40℃ 到 +85℃，封装尺寸约 5.4mm × 3.2mm，适合表面贴装应用。
一、主要特点
- 最大工作电压：60VDC。
- 保持电流：0.14A（140mA），在此电流水平下设备保持低阻状态。
- 跳断后最大阻值：6Ω（R1max），有效限制通过的故障电流。
- 初始低阻值：约 1.5Ω（Rmin），对电路影响小。
- 工作环境温度：-40℃ 至 +85℃，适应广泛工业及消费类环境。
- 1812 表面贴装封装（尺寸约 5.4mm × 3.2mm），便于自动贴装和回流焊工艺。
二、电气行为与保护机理
PPTC（聚合物自恢复过流保护器）在正常工作时呈低电阻状态，允许额定电流通过；当电流或温度超过器件的触发点时，内部聚合物受热并产生电阻显著上升，从而限制后续电流，保护下游电路。故障消除并冷却后，器件电阻恢复到低值，实现自动复位。RF1334-000 对瞬态过流有抑制能力，并能承受高达 10A 的瞬时冲击（请参照厂方数据确认具体脉冲能力与能量限制）。
三、典型应用
- USB、串口和通信接口保护
- 电源管理与分配电路过流保护
- 电池保护与便携式设备
- 工业控制模块与仪器
- 交通与嵌入式电子设备的局部短路、过载保护
四、选型与使用建议
- 确认最大系统电压不超过 60V，以免击穿器件。
- 选择时以实际工作电流和允许的温升为依据；环境温度升高会降低触发电流，应参照厂方 Itrip 对温度的修正曲线进行余量设计。
- 对于需要快速切断短路电流的场合，单纯依赖 PPTC 可能不足以满足保护需求，建议与快速熔断器或限流电路配合使用。
- 打样与量产前务必参考 Littelfuse 的完整数据手册和可靠性试验报告，验证回流焊参数与焊接兼容性。
五、封装与安装注意
- 1812 封装，典型尺寸 5.4mm × 3.2mm，适用于常规 SMD 生产线。
- 建议按照厂方推荐的回流焊曲线进行焊接，避免长期超过最大焊接温度导致性能退化。
- 布局时尽量靠近需保护的电源输入点，减小走线阻抗和感性耦合，提高保护响应效率。
总结：RF1334-000 以其 60V 耐压、0.14A 的保持电流及可靠的自恢复特性，适合用于需重复保护、空间受限且对自动复位有需求的电子产品中。选择与应用时应综合电流、温度与短路能量要求，并遵循 Littelfuse 的技术手册以确保长期可靠性。
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