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CJ SMAJ28CA
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ SMAJ28CA
- Type
- CJ
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- SMAJ28CA
- Electronic Component
- 1
- Package
- SMAG
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.084g
- Electronic Component
- 1
- Electronic Component
- BM0233613193
- Voltage
- 45.4V
- Current(Ir)
- 5uA
- Voltage(VBR)
- 31.1V
- Electronic Component
- Electronic Component
- Electronic Component
- 5000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ28CA (SMAG) — TVS二极管产品概述
一、产品简介
SMAJ28CA 是 CJ（江苏长电/长晶）生产的一款双向瞬态抑制二极管（TVS），封装为 SMAG（SMA 型面向波峰/回流贴装封装）。器件用于吸收瞬态过电压，保护敏感电子电路免受浪涌、电气瞬变和静电放电等冲击。
二、主要电气参数
- 极性：双向
- 反向截止电压 (Vrwm)：28 V
- 击穿电压 (Vbr)：31.1 V
- 钳位电压：45.4 V（峰值冲击时）
- 峰值脉冲电流 (Ipp)：8.8 A
- 峰值脉冲功率 (Ppp)：400 W（10/1000 μs 或典型测试条件下）
- 反向漏电流 (Ir)：5 μA
- 类型：瞬态电压抑制二极管（TVS）
（以上参数为典型/标称值，实际设计时请参照厂家数据手册中的完整电气特性和测试条件。）
三、特性与优势
SMAJ28CA 提供快速响应的双向保护，适用于交流或可能出现正负极性瞬变的场合。高达400 W 的峰值吸收能力和 8.8 A 的脉冲电流能力，可应对相对强烈的浪涌事件。较低的反向漏电流（5 μA）有利于在静态条件下降低功耗和漏电影响。SMAG/SMA 封装便于自动贴片和波峰回流焊接，适合集成到中小功率保护方案中。
四、典型应用场景
- 电源输入端的瞬态浪涌保护（中低压直流/交流系统）
- 通信接口、串行总线的过压保护（如RS-485、CAN总线在非严苛车用条件下）
- 工业控制设备、楼宇自动化及仪表的外部线缆保护
- 供电模块和电源管理电路的局部防护
注：若用于车规或特殊环境（高温、腐蚀、严苛冲击），请确认器件是否满足相关认证和可靠性要求。
五、使用建议与电路接法
- 接法：双向 TVS 通常并联接入被保护线路，两端分别接到地或返回线路，针对正负两极瞬变均能限制电压。
- 布局：尽量将 TVS 放置在被保护端靠近连接器或入口处，减少寄生电感和引线长度，以提高吸收效率。
- 散热：在高能量冲击后器件会产生热量，PCB 应提供足够的铜箔散热和焊盘面积，必要时考虑在周边留出散热区域。
- 兼容性：注意与电路中的滤波器、电感及其他保护元件的配合，避免产生回路振荡或误触发。
六、封装、订购与注意事项
- 封装：SMAG（SMA）表面贴装，适合自动化组装。
- 订购信息：按厂家型号 SMAJ28CA / SMAG，品牌 CJ（江苏长电/长晶）。购买时请确认批次、质量证书及完整数据手册。
- 注意事项：储存和贴装遵循一般半导体防潮防静电规范；选型时核对测试条件（如脉冲宽度、波形 10/1000 μs 或 8/20 μs）以确保在目标应用中的吸收能力足够。
结语：SMAJ28CA 是一款面向中低压瞬态保护的通用型双向 TVS，适用于多种工业与通信场景。为确保可靠性，请在最终设计中参考厂家完整数据手册并结合系统级冲击分析进行选型。
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