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SMAJ43CA是伯恩半导体(BORN) 推出的双向瞬态抑制二极管(TVS),采用DO-214AC(SMA)表面贴装封装,专为低至中等电压域的过压防护场景设计。该器件可快速响应瞬态过压(如静电放电、雷击感应、电路开关尖峰),将电压钳位至安全范围,有效保护敏感电子元件(MCU、传感器、通信接口等)免受损坏,是工业控制、通信设备、消费电子等领域的常用防护器件。
SMAJ43CA的核心定位为双向过压保护器件,关键基础信息如下:
SMAJ43CA的电性能参数经严格测试规范,关键指标如下(测试条件均为标准环境,部分需参考官方 datasheet):
参数名称 数值/规格 说明 反向截止电压(Vrwm) 43V 正常工作时可承受的最大反向直流电压,决定适用电压域(如24V系统留有余量) 击穿电压(Vbr) 52.8V(@1mA DC) 器件开始导通的电压阈值,需与系统工作电压匹配避免误触发 钳位电压(Vc) 69.4V(@Ipp=5.8A) 瞬态过压时钳位到的最大安全电压,直接影响后端元件防护效果 峰值脉冲电流(Ipp) 5.8A(10/1000μs波形) 可承受的瞬态峰值电流,对应峰值脉冲功率400W 反向漏电流(Ir) 1μA(@Vrwm=43V) 低漏电流特性,适合低功耗应用场景 峰值脉冲功率(Ppp) 400W(10/1000μs波形) 瞬态过压下的最大耗散功率注:10/1000μs为标准浪涌测试波形(上升时间10μs,半峰值时间1000μs)。
SMAJ43CA采用DO-214AC(SMA)表面贴装封装,具有以下优势:
结合参数特性,SMAJ43CA主要应用于12V/24V电压域的过压防护,典型场景包括:
SMAJ43CA凭借双向防护、低漏电流、小型化封装及可靠的过压能力,成为12V/24V系统中敏感元件防护的优选器件,适用于通信、工业、消费电子等多领域,可有效提升电路抗干扰能力,降低元件损坏风险。
(注:以上参数及特性均基于伯恩半导体公开资料,具体应用需参考官方完整 datasheet。)
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