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Littelfuse 2920L185DR
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- Littelfuse 2920L185DR
- Type
- LITTELFUSE
- Unit
- Electronic Component
- Minimum package
- 1500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- LITTELFUSE
- Electronic Component
- 2920L185DR
- Electronic Component
- 1
- Electronic Component
- 5.44mm
- Package
- 2920
- Electronic Component
- Resettable Fuse
- Electronic Component
- 0.183g
- Electronic Component
- 7.98mm
- Electronic Component
- 1.25mm
- Electronic Component
- 1
- Electronic Component
- 2.5s
- Electronic Component
- BM0000284808
- Operating Temperature
- 40℃~+85℃
- Voltage Rating(Vmax)
- 33V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
Littelfuse 2920L185DR 产品概述
基本信息
Littelfuse 2920L185DR 是一种聚合物 PTC（正温度系数）自恢复保险丝，专为高可靠性和高性能的电路保护设计。其工作温度范围为-40°C 至 85°C，使其适用于各种严苛的环境条件。该产品在表面贴装型（SMD）封装中表现出优异的电流和电压特性，适合在电源管理、消费电子、汽车和工业设备等多种应用场景中使用。
关键规格
- 工作温度范围: -40°C 至 85°C
- 材料类型: 聚合物
- 最大电压: 33V
- 最大电流: 40A
- 保持电流 (Ih): 1.85A
- 跳闸电流 (It): 3.7A
- 初始电阻 (Ri): 50mΩ（最小值）
- 跳断电阻 (R1): 150mΩ（最大值）
- 最大动作时间: 2.5s
- 封装类型: 2920（7351 公制），凹陷
- 尺寸: 0.289" 长 x 0.202" 宽（7.35mm x 5.12mm），最大厚度为 0.049"（1.25mm）
工作原理
自恢复保险丝是一种安全装置，它使用聚合物材料在过电流条件下具有特定的响应特性。当电流超过设定的跳断电流（3.7A）时，保险丝会迅速加热并进入高阻抗状态，从而切断电流流动，保护后续电路的安全。这一过程通常不超过2.5秒，确保设备快速响应过载情况。而一旦过载情况解除，保险丝会自动恢复至正常工作状态，无需更换，提高了使用便捷性与经济性。
应用领域
Littelfuse 2920L185DR 被广泛应用于：
- 电源管理: 为开关电源和电池管理系统提供保护，确保系统安全运行。
- 消费电子: 在智能手机、平板电脑等设备中提供过电流保护。
- 汽车电子: 用于车载电子设备的安全防护，如车载导航、音响系统等。
- 工业设备: 保护传感器、执行器以及其他关键设备免受过电流和短路损害。
设计与安装
2920L185DR 采用表面贴装技术 (SMD)，便于在现代电路板上应用，适合高密度集成电路设计。其小巧的体积（7.35mm x 5.12mm）和轻便的特性，使其在尺寸和重量受限的设计中变得尤为实用。同时，具体的封装和安装设计可以有效降低组件之间的电磁干扰，提高电路的整体稳定性。
总结
作为一款公认的电路保护元件，Littelfuse 2920L185DR 聚合物 PTC 自恢复保险丝以其优越的性能和可靠性，满足了现代电子设备对电流保护的高标准。无论是在普通消费电子产品，还是在要求更严苛的工业和汽车应用中，2920L185DR 都展现出了良好的适应性和持久性，为电路的安全运行提供了有力保障。选择 Littelfuse 2920L185DR，是高性能电路保护的明智之举。
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