Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
Littelfuse 0438002.WR 0438002
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- Littelfuse 0438002.WR
- Type
- LITTELFUSE
- Unit
- Electronic Component
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- LITTELFUSE
- Electronic Component
- 0438002.WR
- Electronic Component
- 1
- Electronic Component
- 0.8mm
- Package
- 0603
- Type
- SMD Fuse
- Electronic Component
- Non-Resettable Fuse
- Electronic Component
- 0.036g
- Electronic Component
- 1.6mm
- I2t
- 0.0017
- Electronic Component
- 1
- Electronic Component
- 50A
- Electronic Component
- BM0228270326
- Operating Temperature
- 55℃~+150℃
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
0438002.WR 产品概述
一、产品简介
0438002.WR 为 Littelfuse（美国力特）出品的一款贴片式熔断器，封装为常见的 0603（长 1.6mm × 宽 0.8mm），面向对体积敏感的电子板级保护场景。标称额定电流 2A，额定电压 32VDC（交流额定 12VAC），断开能力 50A，工作温度范围宽（-55°C 至 +150°C），适用于低压直流与交流系统的过流保护需求。
二、主要参数（关键规格）
- 类型：贴片式保险丝（SMD fuse）
- 尺寸：0603（1.6mm × 0.8mm）
- 额定电流：2A
- 额定电压：32V DC，12V AC
- 分断能力（Breaking Capacity）：50A
- 熔断 I2t：0.0017 A^2s（能量指标，反映击穿时的能量释放）
- 工作温度：-55°C ~ +150°C
- 品牌：Littelfuse（美国力特）
三、产品特性与优势
- 小尺寸、高集成度：0603 封装便于在高密度 PCB 上布置，适合便携与空间受限产品。
- 宽温度适应性：-55°C 至 +150°C，适合严苛环境与工业级应用。
- 较高分断能力：50A 分断能力可应对短路时短时大电流，减少故障延伸风险。
- 低 I2t 值：0.0017 A^2s 表示熔断时释放的能量较小，有利于限制对被保护器件的能量冲击。
四、典型应用场景
- 通信设备与网络模块的电源保护
- 工业控制、电源模块、仪表的电路保护
- 消费电子、便携式设备及充电/供电模块
- LED 驱动与小功率直流电源保护
五、选型与使用建议
- 确认熔断特性：本规格未指明为快速熔断还是延时型，设计前请查阅原厂数据手册以确认时间-电流特性是否匹配负载启动电流与浪涌条件。
- 考虑额定与实际条件：工作电流应留有裕量；若存在较大浪涌，应以 I2t 与时间-电流曲线判断是否会误熔或延迟动作。
- PCB 设计与焊接：遵循 Littelfuse 推荐的焊盘与回流工艺，避免在焊接过程中对器件施加过大机械应力或超出温度限制。
- 存储与搬运：贴片器件宜保持干燥包装，避免受潮影响再流焊可靠性。
六、可靠性与合规性
该器件的宽温工作范围与较高的分断能力体现了良好的可靠性表现。实际应用时请参考制造商的可靠性测试数据（如温循环、湿热、冲击振动等）以及是否具备相关认证（例如 UL、AEC 等）以满足特定行业要求。
七、包装与采购信息
- 品牌：Littelfuse（美国力特）
- 型号标识：0438002.WR
- 封装形式：0603 SMD 采购时建议向授权分销商获取最新数据手册与可追溯的合格证书，并确认最小订购量与包装形式（卷带、盘装等）。
总结：0438002.WR 以微小封装、高分断能力和宽温范围为特点，适合在空间受限且要求可靠过流保护的低压电子设计中使用。选型时需结合实际浪涌特性与制造商详细数据以确保最佳保护效果。
Request for quote
Send RFQ
Use the form for single models, category sourcing, and multi-line BOM requirements.
Product sourcing intelligence
Model, package, availability, and BOM fit reviewed before quotation.
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
BOM matching & alternatives
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Sourcing availability signal
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Examples of how common component sourcing requests are organized.
Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.
The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
Related products
Packaged components ready for RFQ.
