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DOWO SMBJ54A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMBJ54A
- Type
- DOWO
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMBJ54A
- Electronic Component
- 1
- Package
- SMB(DO-214AA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.214g
- Electronic Component
- 1
- Electronic Component
- BM0264801958
- Operating Temperature
- 55℃~+150℃
- Voltage
- 87.1V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 60V
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMBJ54A瞬态抑制二极管（TVS）产品概述
SMBJ54A是DOWO（东沃） 推出的单向瞬态抑制二极管（TVS），采用SMB（DO-214AA）小型表面贴装封装，专为中高压电路的瞬态过压防护设计，可有效吸收雷击浪涌、ESD静电放电、EFT电快速瞬变脉冲等干扰，保护敏感电子元件免受损坏。
一、产品核心定位与类型
SMBJ54A属于单向TVS二极管，仅对单一方向的过压脉冲（如电源正极→地的浪涌）提供防护，区别于双向TVS的全向防护。其设计适配中高压电路（54V级）的常规工作场景，是电源端口、信号接口浪涌抑制的高性价比选择。
二、关键电气参数详解
SMBJ54A的核心参数围绕“浪涌防护能力”和“电路兼容性”展开，关键指标如下：
参数名称 数值 意义说明 反向截止电压（VRWM） 54V 正常工作时反向偏置不导通的最大电压，电路正常电压需低于此值，避免误触发。 最小击穿电压（VBR） 60V 反向电压超过此值时，二极管进入雪崩击穿状态，启动钳位防护。 钳位电压（VC） 87.1V 浪涌脉冲峰值时二极管两端的最高电压，远低于后级元件耐压阈值（如100V级器件）。 峰值脉冲电流（IPP） 6.89A 10/1000us标准浪涌波形下可承受的最大峰值电流，反映浪涌吸收能力。 峰值脉冲功率（Ppp） 600W 同波形下的峰值功率，适配中等功率浪涌场景（如小型电源模块）。 反向漏电流（Ir） 1uA 正常工作电压下的漏电流，数值极小，不影响电路正常功耗。三、封装与物理特性
SMBJ54A采用SMB（DO-214AA）封装，具备以下优势：
- 尺寸小巧：约2.4×5.0mm（长×宽），适合高密度PCB设计；
- 表面贴装：兼容自动化生产，降低焊接成本；
- 热性能良好：封装材料导热性佳，可快速 dissipate 浪涌产生的热量；
- 引脚兼容：适配常规SMB焊盘，替换/升级便捷。
四、典型应用场景
结合参数与封装特点，SMBJ54A广泛应用于以下领域：
- 汽车电子：车载电源模块、传感器接口（工作温度-55~150℃适配汽车级工况）；
- 通信设备：基站射频模块、光纤收发器的电源/信号端口防护；
- 工业控制：PLC输入输出端口、电机驱动电路的浪涌抑制；
- 消费电子：高端充电器、智能家居设备的电源防护；
- 医疗电子：小型医疗仪器的敏感电路防护（低漏电流优势）。
五、环境适应性说明
SMBJ54A的工作温度范围为**-55℃至+150℃**，覆盖：
- 工业级严苛环境（如户外基站、高温车间）；
- 汽车级高低温循环（如发动机舱周边设备）；
- 常规消费电子的温度波动场景。
存储温度兼容-65℃至+150℃，可长期稳定存放。
六、品牌与可靠性支撑
DOWO（东沃）是国内专业的防护器件厂商，SMBJ54A具备以下可靠性保障：
- 环保认证：符合RoHS、REACH标准，无有害物质；
- 测试验证：通过浪涌寿命测试（1000次10/1000us脉冲）、高低温循环测试；
- 行业适配：部分批次支持汽车电子AEC-Q101标准，满足车规级要求。
总结
SMBJ54A凭借中高压防护能力、小型化封装、宽温适应性，成为电源/信号端口过压防护的实用选择，可有效解决多数电子设备的瞬态干扰问题，适配多领域的可靠性需求。
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