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SMCJ22CA是伯恩半导体(BORN)推出的一款双向瞬态抑制二极管(TVS),采用SMC(DO-214AB)表面贴装封装,专为电路过压保护设计,可有效吸收雷击、静电放电(ESD)、开关瞬态等突发过压脉冲,保护后端敏感电子元件免受损坏。
作为通用型TVS器件,SMCJ22CA的核心作用是**“瞬态过压钳位”**:当电路出现瞬间过压(如充电插头插拔、电机启停、雷击感应等)时,器件快速反向击穿,将过压脉冲钳位在安全范围,同时泄放脉冲能量,避免后端IC、传感器、接口电路被击穿。
其双向极性设计是核心优势——无需区分正负极,安装直接贴装,简化生产流程,降低错装风险。
SMCJ22CA的参数经严格测试,覆盖常规过压保护场景,核心参数如下:
参数名称 规格/典型值 意义说明 极性 双向 正反向均能保护,安装无极性要求 反向截止电压(Vrwm) 22V 正常工作可承受的最大反向电压,需匹配电路正常电压(如12V电路适配性强) 击穿电压(Vbr) 24.4V 反向击穿阈值(约为Vrwm的1.1倍),启动保护的临界电压 钳位电压(Vclamp) [email protected] 峰值脉冲电流42.3A时,将电压钳位至35.5V,保护后端元件不超耐压 峰值脉冲电流(Ipp) 42.3A 单次8/20μs标准脉冲可承受的最大电流峰值 峰值脉冲功率(Ppp) 1.5kW 瞬态功率容量,可吸收1.5kW突发脉冲能量 反向漏电流(Ir) 1μA 截止状态漏电流极小,不影响电路正常工作注:以上数据基于伯恩官方测试(25℃环境)。
SMCJ22CA采用SMC(DO-214AB)表面贴装封装,具备三大优势:
SMCJ22CA的参数特性适配多领域:
SMCJ22CA经多项可靠性测试,满足常规场景要求:
确保保护效果需注意:
SMCJ22CA凭借双向极性、紧凑封装、1.5kW脉冲功率,成为消费电子、工业控制、通信设备的理想过压保护选择。低漏电流、高脉冲耐受能力,可提升电路抗干扰性与可靠性,降低售后故障风险。
如需完整细节,可查阅伯恩半导体官方SMCJ22CA datasheet。
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