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CJ SMAJ30CA
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ SMAJ30CA
- Type
- CJ
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- SMAJ30CA
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.083g
- Electronic Component
- 1
- Electronic Component
- BM0228055746
- Voltage
- 48.4V
- Current(Ir)
- 5uA
- Voltage(VBR)
- 33.3V
- 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.
SMAJ30CA 产品概述
一、产品简介
SMAJ30CA 是 CJ（江苏长电/长晶）推出的一款双向瞬态抑制二极管（TVS），封装为 SMA（DO-214AC）。器件专为瞬态过电压与浪涌冲击保护设计，常用于直流/交流供电总线、信号线和工业设备的浪涌保护。其在工业级 24V/30V 级别系统中具有良好的吸收能力与较低的漏电特性。
二、主要参数
- 类型：TVS（双向）
- 反向截止电压 Vrwm：30V（反向工作电压）
- 击穿电压（典型）：33.3V
- 钳位电压（典型）：48.4V（对应峰值脉冲电流）
- 峰值脉冲功率 Ppp：400W（8/20µs 波形）
- 峰值脉冲电流 Ipp：8.3A
- 反向电流 Ir：5µA（在 Vrwm 条件下）
- 封装：SMA（DO-214AC）
三、主要特性
- 双向结构，可直接吸收正负极性的瞬态脉冲，适合交流或可能反向冲击的场合。
- 高峰值吸收能力（400W，8/20µs），对短时间大能量浪涌有良好缓冲。
- 低漏电（5µA），在长期工作状态下对系统静态功耗影响小。
- SMA 封装兼顾散热与工艺适配，适合表面贴装批量生产。
四、典型应用
- 24V/30V 工业控制电源浪涌保护。
- 电源输入端、逆变器与驱动模块的浪涌吸收。
- 通信接口或数据总线在存在较强干扰或雷击脉冲时的保护。
- 家电、仪器仪表、电动工具等对瞬态过压敏感的设备。
五、选型与使用注意
- 确认系统工作电压：Vrwm=30V 适用于标称24V/直流30V以下系统；若系统工作电压高于30V，应选用更高 Vrwm 等级。
- 钳位电压与被保护器件耐压匹配：钳位 48.4V 是在峰值电流条件下的典型值，请确保保护对象能承受该瞬态电压。
- 考虑能量吸收与重复冲击：若频繁或高能量浪涌发生，应配合熔断器、限流电阻或更高功率的浪涌保护器件使用。
- 双向器件在单向直流系统中会有反向电流与降压特性差异，若要求极低漏电或单向保护，优先考虑单向 TVS。
六、封装与焊接建议
- SMA（DO-214AC）为标准表面贴装封装，建议采用回流焊工艺，PCB 布局中将 TVS 放置在保护节点与地之间，尽量缩短走线以降低串联电感。
- 注意焊盘与热沉设计，必要时在反面或接地处增加铜箔以便散热。
- 在高能量场合，焊接和安装要保证良好机械支撑，避免冲击导致焊点疲劳。
七、结论
SMAJ30CA 以其 30V 工作电压、400W 峰值吸收能力和双向结构，适合多数 24V/30V 级别的工业与电子设备浪涌保护场景。选用时需关注系统耐压和能量要求，并配合同级保护与布线设计，以获得最佳防护效果。
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