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TECH PUBLIC SMAJ30CA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TECH PUBLIC SMAJ30CA
- Type
- TECH PUBLIC
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TECH PUBLIC
- Electronic Component
- SMAJ30CA
- Electronic Component
- 1
- Package
- DO-214AC(SMA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.117g
- Electronic Component
- 1
- Electronic Component
- BM0231019644
- Operating Temperature
- 55℃~+150℃
- Voltage
- 48.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 36.8V
- 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.
SMAJ30CA 产品概述
SMAJ30CA 是 TECH PUBLIC（台舟电子）推出的一款双向瞬态电压抑制器（TVS），封装为 DO-214AC（SMA），用于对中低电压电源线和信号线提供浪涌、雷击及电气过压瞬态保护。器件针对 10/1000 μs 脉冲条件下的浪涌能量进行了优化，适合工业控制、电源模块、通信接口及各种电子设备的开路或并联保护。
一、主要电气参数与性能特点
- 极性：双向，适用于交流或可正负切换的应用场合。
- 反向截止电压（Vrwm）：30 V（稳压工作区间），适配 24 V 及以下系统的稳态保护。
- 击穿电压（Vbr）：36.8 V（标称），在超过此电压时进入雪崩导通。
- 钳位电压（Vc）：48.4 V（在 Ipp 条件下），保证被保护电路不被过高电压损坏。
- 峰值脉冲电流（Ipp）：8.3 A @ 10/1000 μs（单次冲击能力）。
- 峰值脉冲功率（Ppp）：400 W @ 10/1000 μs（吸收瞬态能量能力）。
- 反向电流（Ir）：1 μA（在 Vrwm 条件下，漏电小，有利于低功耗系统）。
- 工作温度范围：-55 ℃ 至 +150 ℃，适应宽温场景。
二、典型应用场景
- 24 V 工业控制电源与负载保护（PLC、驱动器、继电器模块）。
- 电源输入保护（开关电源、适配器、逆变器输入端）。
- 接口和通信线路保护（RS-485、串口、传感器供电线，双向传输场合）。
- 消费电子与仪器仪表的浪涌防护与系统可靠性提升。
三、使用与布局建议
- 建议将 TVS 尽量靠近需要保护的器件或连接器放置，走线短且截面积大，以降低寄生电感与热阻。
- 对于高能量冲击，应配合熔断器、PTC 或气体放电管等一级器件进行级联保护，分担能量并提高整体可靠性。
- 在 PCB 设计中为器件焊盘留足铜箔和必要的散热层，必要时采用过孔与底层大铜皮散热。
- 多个相同型号并联使用时须注意匹配与均流问题，推荐在并联前评估工作点和热平衡。
四、可靠性与环境适应性
SMAJ30CA 具备宽工作温度（-55～+150 ℃）和低漏电（1 μA）特性，适合长期在恶劣环境中工作。DO-214AC（SMA）封装提供良好的机械强度与焊接性，适合自动贴装与波峰/回流焊工艺。
五、选型与注意事项
- 若系统稳态电压接近或略高于 30 V，应选用更高 Vrwm 的型号以避免误触发。
- 钳位电压 48.4 V 为在标准脉冲条件下的典型值，实际电路中钳位电压会受导线电感与布局影响；在高精度保护需求下需留有额外裕量。
- 对于反复高能冲击场合，应评估器件的循环寿命与热管理策略，必要时选择更高功率等级或外加能量分流措施。
SMAJ30CA 以其双向保护、较高瞬态吸收能力和宽温工作特性，适用于对 24 V 等中低压系统有可靠浪涌防护需求的场合。选型时建议结合系统的实际脉冲波形与能量分布进行验证测试，确保长期稳定运行。
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