WMSIC Electronic Components

Littelfuse 0437002.WRA 0437002

Model0437002.WRA
Package1206
BrandLittelfuse
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
Littelfuse 0437002.WRA
Type
LITTELFUSE
Minimum package
3000

Technical parameters

Electronic Component
LITTELFUSE
Electronic Component
0437002.WRA
Electronic Component
1
Electronic Component
1.6mm
Package
1206
Type
Ceramic Tube Fuse
Electronic Component
Non-Resettable Fuse
Electronic Component
0.039g
Electronic Component
3.2mm
Electronic Component
0.835mm
I2t
0.144
Electronic Component
1
Electronic Component
50A
Electronic Component
BM0227742665
Operating Temperature
55℃~+150℃
Voltage
63V

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

0437002.WRA — Fuse Chip Fast Acting 2A 63V (Littelfuse)

一、主要参数

  • 类型:陶瓷管保险丝(SMD)
  • 型号/封装:1206(尺寸 3.2 × 1.63 × 0.83 mm)
  • 额定电流:2 A
  • 额定电压:63 V
  • 熔断特性:快熔(Fast Acting)
  • 熔断能量指标(I2t):0.144 A²s
  • 分断能力:50 A
  • 工作温度范围:-55 ℃ ~ +150 ℃
  • 包装方式:T/R(Tape & Reel,卷盘包装)
  • 品牌:Littelfuse(美国力特)

二、产品特性

  • 快速响应:作为 Fast Acting 型保险丝,该型号在过流情况下能迅速切断电路,减少对被保护元件的能量冲击,适合保护对过流敏感的半导体器件与电路。
  • 陶瓷管体:陶瓷外壳具备优良的热稳定性和机械强度,能够在高温或冲击环境下保持可靠性,适合更严苛的应用场景(如车规环境)。
  • 小尺寸 SMD 形式:1206/3.2×1.63×0.83 mm 的标准表面贴装封装,便于自动化贴装与回流焊接,占板面积小,利于高密度布板设计。
  • 低能量让渡:I2t = 0.144 A²s 表明在熔断过程中允许的能量相对较小,能更有效地保护敏感负载免受过电流造成的损害。
  • 高分断能力:50 A 的分断能力意味着在短路或严重过流时,保险丝能承受并切断较大的故障电流,提升系统安全性。

三、典型应用

  • 汽车电子:车载控制模块、传感器供电保护、车载通信与信息娱乐系统中的过流保护(针对汽车环境设计的温度与机械可靠性)。
  • 电源与充电设备:小功率开关电源、DC-DC 转换器、充电电路保护。
  • 消费类与工业电子:移动设备接口保护、嵌入式系统、电机驱动的控制电路(作为次级或敏感元件保护)。
  • 通用电子保护:任何需要快速切断过流以保护半导体器件或低能量电路的场合。

四、安装与使用注意事项

  • 焊接兼容性:此为 SMD 器件,推荐采用标准回流焊工艺;在设计焊盘时留意与器件尺寸匹配并控制焊膏量以避免焊接不良或机械应力。
  • 热管理与环境温度:工作电流的实际承载能力会随环境温度升高而下降。长期在高温环境下使用时需考虑适当的电流裕度与散热设计。
  • 机械应力与防护:在装配与使用过程中避免对陶瓷管体产生过大弯曲或冲击,必要时在 PCB 设计中考虑固定与减振措施。
  • 替换与维护:更换时使用相同额定值与相同性能的产品以保证保护特性;若用于车规或关键系统,建议记录更换历史并使用可追溯包装采购。
  • 清洁与化学兼容性:避免使用可能侵蚀陶瓷或端子镀层的强腐蚀性清洗剂,若需清洗请参考制造商推荐的工艺。

五、性能说明与选型提示

  • 选型依据:当保护对象为对过流响应要求快速且能承受短时间高峰电流(但需切断以防损坏)时,本型号为合适选择。若保护对象允许短时大电流延迟熔断,可考虑慢熔(Time-Lag)类型。
  • I2t 与保护级别:较低的 I2t 值意味着熔断更“干脆”,适合保护敏感器件;设计时应结合系统可能出现的启动冲击电流来判断是否需要熔断器或并联限流措施。
  • 分断能力考量:50 A 的分断能力适用于常见的小功率系统短路情形,但在极端高能故障时仍需与系统总体保护策略(如上游断路器或熔断器)配合。

六、包装与质量可追溯

  • 卷盘(T/R)包装适合高速表面贴装生产线,便于自动贴装与库房管理。
  • Littelfuse 品牌提供行业级质量管理与出厂测试记录,适用于对可靠性与一致性要求较高的工程应用。采购时可向供应商索取证书与样片进行验证。

七、产品概述小结

0437002.WRA 为 Littelfuse 提供的 1206 SMD 快速熔断陶瓷管保险丝,额定 2 A / 63 V,具有低 I2t(0.144 A²s)与 50 A 分断能力,适合对过流响应要求高、工作环境较为苛刻的汽车与工业电子应用。其小尺寸与 SMD 兼容性利于现代化自动化生产;在选型与应用时应综合考虑环境温度、启动冲击电流与系统总体保护策略,以确保器件在实际工况下的可靠性与安全性。若需进一步的电气特性曲线(时间-电流特性)、回流焊温度曲线或资格认证资料,建议直接咨询 Littelfuse 官方技术支持或代理商获得完整数据表。

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