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BORN SMAJ48A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN SMAJ48A
- Type
- BORN
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- SMAJ48A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.12g
- Electronic Component
- 1
- Electronic Component
- BM0231019379
- Operating Temperature
- 55℃~+150℃
- Voltage
- 77.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 58.9V
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ48A 产品概述
一、概述
SMAJ48A 是 BORN（伯恩半导体）出品的一款单向瞬态电压抑制二极管（TVS），封装为常见的 SMA (DO-214AC)。器件设计用于保护对直流极性敏感的电路免受瞬态过电压和浪涌冲击。其主要参数包括反向截止电压（Vrwm）48V、钳位电压约77.4V、击穿电压58.9V，峰值脉冲电流 Ipp 为 5.2A（10/1000μs 波形），峰值脉冲功率 Ppp 为 400W（10/1000μs），工作温度范围宽 (-55℃ 至 +150℃)，反向漏电流 Ir 约 1μA。
二、主要特点
- 单向工作，适合直流电路保护；
- 反向稳压点与钳位性能匹配，Vrwm=48V，钳位约77.4V，可在高压浪涌时限制电压峰值；
- 对 10/1000μs 浪涌有良好吸收能力，Ipp=5.2A，Ppp=400W，适用于线路雷击或开关冲击；
- 低漏电流（Ir≈1μA），对待保护电路影响小；
- 宽温度范围，适合恶劣环境和工业级应用。
三、典型应用场景
- 48V 供电系统保护（如工业供电、PoE、远程供电设备）；
- 电源输入、受保护的 DC 母线、逆变器与变换器的浪涌防护；
- 通信设备、基站与网络设备的线路保护；
- 工业控制系统与传感器接口的瞬态过压钳制。
四、封装与安装提示
SMA (DO-214AC) 为常见的表面贴装封装，便于自动化贴片生产与回流焊。安装时建议：
- 根据制造商推荐的 PCB 尺寸和铜箔面积布局，增大散热铜箔以提高能量吸收能力；
- 回流焊温度曲线应符合无铅工艺规范，以保证焊接可靠性；
- 为保证器件长期可靠，避免在高于额定结温条件下长期工作，必要时采用散热措施或并联分流方案。
五、选型与使用注意
- 选择单向 TVS 时，应确认被保护线的正常工作电压低于 Vrwm（此处为 48V），否则可能触发导通；
- 对需要更低钳位电压的场合，可考虑额定 Vrwm 略低或选择更高电流能力的型号；
- 器件标称数据基于标准测试条件（如 10/1000μs 浪涌波形），在复杂环境下应依据实际试验验证保护效果；
- 虽然 TVS 对瞬态冲击有良好吸收，但不替代熔断器或其它过流保护器件，二者常配合使用以提高系统可靠性。
六、可靠性与包装信息
SMAJ48A 具备工业级工作温度（-55℃ 至 +150℃），适应高低温循环与常见机械振动环境。常见包装为卷装（用于 SMT 自动贴装）或管装，订购时请指明所需封装形式与数量。
总结：SMAJ48A 是一款适用于 48V 级直流系统的高能量吸收单向 TVS，具有低漏流、宽温度范围和良好浪涌能力，适合工业、通信与电源输入等多种保护场景。选型与使用时请结合实际电路工作电压、浪涌特性及散热条件进行验证。
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