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Littelfuse SMAJ18A
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
20
specifications
Core information
- Product name
- Littelfuse SMAJ18A
- Type
- LITTELFUSE
- Unit
- Electronic Component
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic Component
- LITTELFUSE
- Electronic Component
- SMAJ18A
- Electronic Component
- 1
- Package
- DO-214AC(SMA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.124g
- Electronic Component
- 1
- Electronic Component
- BM0000283215
- Operating Temperature
- 65℃~+150℃
- Voltage
- 29.2V
- Electronic Component
- IEC 61000-4-4；IEC 61000-4-2
- Current(Ir)
- 1uA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ18A 产品概述
1. 产品介绍
SMAJ18A是一款高性能的瞬态电压抑制二极管（TVS二极管），专为电源线路保护和对敏感电子元器件的过电压保护设计。该器件的主要特点是其高峰值脉冲电流承受能力和低击穿电压特性，使其能够有效地吸收瞬态电压，同时确保电路的安全性。无论是在工业设备、通信设备还是消费电子产品中，SMAJ18A均能发挥出色的保护功能。
2. 关键参数
- 极性: 单向（Unidirectional），仅允许在一个方向上导通。
- 击穿电压: 最小值为20V，能在特定条件下有效保护后续电路不受高于此电压的影响。
- 反向关断电压: 典型值为18V，适用于多种低电压应用场景。
- 峰值脉冲电流: 13.7A（10/1000us），具备良好的瞬态电流处理能力，可以应对短时间内较高的电压冲击。
- 箝位电压: 在峰值脉冲电流下的最大箝位电压为29.2V，确保在保护电路时不会让电压超过安全范围。
- 功率处理能力: 峰值脉冲功率达400W，适合各类瞬态电压情况的应对。
- 工作温度范围: -65°C至150°C，使之可以在极端环境下正常工作，保证了其广泛的应用场景。
3. 封装与安装
SMAJ18A采用SMA（DO-214AC）封装，属于表面贴装型（SMD）组件。这种封装方式极大地简化了元件在电路上的安装过程，并有助于节省空间，适合现代小型化电子产品的需求。这种结构提供了优良的热导性能和可靠的机械强度，确保在各种工作条件下保持良好的性能。
4. 应用场景
SMAJ18A广泛应用于多个领域，包括但不限于：
- 通信设备: 用于保护调制解调器和线路接口。
- 工业控制系统: 保护输入/输出端口免受电压尖峰的影响。
- 消费电子: 适用于手机、平板、计算机等设备的电源线保护。
- 汽车电子: 针对汽车内部电路中可能出现的电压冲击进行保护。
5. 性能优势
SMAJ18A的性能优势在于其快速响应时间和较低的动态电阻，使其在电压突发情况下能够迅速反应，有效地限制电流并防止电路损坏。此外，其高功率处理能力确保可以应对高能瞬态事件，比许多同类产品表现更为出色。
6. 选型考虑
在选择SMAJ18A作为电源线路保护的解决方案时，用户需根据实际应用的电压范围、峰值脉冲电流及环境条件等因素进行综合考虑。同时，由于其多种特性，SMAJ18A也适合与其他保护元件组合使用，以加强电路的抗干扰能力。
7. 结论
综上所述，Littelfuse出品的SMAJ18A是一款兼具高性能与可靠性的瞬态电压抑制二极管，凭借其良好的电气特性和极端环境适应能力，成为电源保护与电路屏蔽的理想选择。无论是在消费类产品、工业控制设备、通信设施，还是汽车电子中，SMAJ18A都能为设计人员提供有效的保护方案，确保设备安全稳定地运行。
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