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CJ CJSMAJ12A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ CJSMAJ12A
- Type
- CJ
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- CJSMAJ12A
- Electronic Component
- 1
- Package
- SMAG
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.112g
- Electronic Component
- 1
- Electronic Component
- BM0265599156
- Voltage
- 19.7V
- Current(Ir)
- 5uA
- Voltage(VBR)
- 14.69V
- 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.
CJSMAJ12A TVS瞬态抑制二极管产品概述
CJSMAJ12A是江苏长电（CJ）推出的单向瞬态抑制二极管（TVS），采用SMAG小型表面贴装封装，专为电子设备的过压/浪涌保护设计。核心参数聚焦12V反向截止电压、400W峰值脉冲功率，可快速抑制10/1000us波形的瞬态干扰，适配高密度PCB布局场景，是消费电子、汽车电子等领域小功率电路保护的实用器件。
一、产品定位与核心属性
CJSMAJ12A属于小功率单向TVS管，核心作用是在电路遭遇瞬态过压（如雷击感应、电源波动、负载切换浪涌）时，快速响应（ns级）并将电压钳位至安全范围，避免后端敏感元器件（MCU、传感器、IC）损坏。
其核心属性可总结为：
- 单向极性：仅对特定方向（如电源正→地）的过压脉冲起保护作用；
- 低功耗漏电流：反向截止状态下漏电流极小，不影响电路正常工作；
- 紧凑封装：SMAG封装适配高密度PCB，适合小型化设备。
二、关键电气参数详解
各参数直接反映器件的保护能力与工作特性，具体如下：
参数名称 数值 实际意义 反向截止电压（Vrwm） 12V 正常工作时反向偏置的最大允许电压，器件保持高阻态，漏电流极小 击穿电压（Vbr） 14.69V（典型值） 反向电压升至该值时，器件进入雪崩击穿，电阻急剧下降开始分流 钳位电压（Vc） 19.7V 10/1000us波形下的最大钳位电压，过压时将电路电压限制在此值以内 峰值脉冲电流（Ipp） 20.1A@10/1000us 模拟雷击/瞬态脉冲的最大允许峰值电流，与钳位电压共同决定浪涌承受能力 峰值脉冲功率（Ppp） 400W@10/1000us 对应波形下的最大脉冲功率（Vc×Ipp≈400W），体现器件抗浪涌的核心能力 反向电流（Ir） 5uA 12V反向偏置下的漏电流，极小值确保低功耗，适合电池供电设备三、封装与物理特性
CJSMAJ12A采用SMAG小型表面贴装封装，具备以下特点：
- 尺寸紧凑：参考长电官方数据，封装尺寸约为2.3mm×1.5mm×1.0mm，适配智能手机、智能穿戴等小型化设备的高密度PCB；
- 环保合规：符合RoHS 6无（无铅、无镉等）要求，支持自动化贴片生产；
- 环境适应性：塑封结构具备抗机械冲击能力，工作温度范围通常为-55℃~+150℃，满足工业级/消费级应用场景。
四、品牌与可靠性保障
CJ（江苏长电/长晶）是国内领先的半导体分立器件制造商，CJSMAJ12A的可靠性经过多重验证：
- 认证资质：通过ISO 9001质量管理体系、IATF 16949汽车电子认证；
- 可靠性测试：包含高温存储（150℃×1000h）、温度循环（-55℃~+150℃×1000次）、湿度测试（85℃/85%RH×1000h）等，确保恶劣环境下长期稳定；
- 兼容性：可替代同类进口小功率TVS器件（如SMBJ12A的紧凑版本），降低供应链成本。
五、典型应用场景
CJSMAJ12A的小功率特性与紧凑封装，使其适用于以下场景：
- 消费电子：智能手机/平板的USB充电端口、耳机接口，智能手表的电源模块，防止充电浪涌或静电损坏；
- 汽车电子：车载小功率辅助电路（仪表盘背光、胎压传感器），应对点火/负载切换产生的12V系统过压；
- 工业控制：PLC输入输出端口、小型传感器模块（温度/压力），抑制工业电磁干扰（EMI）；
- 通信设备：无线路由器、交换机的电源/以太网接口，防护雷电感应过压。
CJSMAJ12A以其优异的过压钳位性能、紧凑封装与可靠品质，成为小功率电路过压保护的高性价比选择，可有效提升电子设备的抗干扰能力与使用寿命。
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