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Slkor SMBJ12A
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Slkor SMBJ12A
- Type
- SLKOR
- Minimum package
- 750 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- SLKOR
- Electronic Component
- SMBJ12A
- Electronic Component
- 1
- Package
- DO-214AA
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.199g
- Electronic Component
- 1
- Electronic Component
- BM0230012695
- Voltage
- 19.9V
- Current(Ir)
- 5uA
- Voltage(VBR)
- 15.3V
- Electronic Component
- Electronic Component
- Electronic Component
- 750
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMBJ12A（Slkor）产品概述
一、产品简介
SMBJ12A 是 Slkor（萨科微）推出的一款单向瞬态电压抑制二极管（TVS），采用 DO-214AA（SMB）封装。器件专为保护 12V 等级电源和信号线免受雷击、开关瞬变和电感负载释放产生的高能脉冲过电压而设计，具有快速响应、能量吸收能力强、体积小、易于表面贴装等优点。
二、主要技术参数
- 极性：单向（对正向导通和反向钳位有明确工作特性）
- 反向工作电压 Vrwm：12V
- 击穿电压 VBR：13.3V（典型），最大约 15.3V（请参考厂方曲线）
- 钳位电压 VC：19.9V（在峰值脉冲条件下测得）
- 峰值脉冲电流 Ipp：30.2A（对应所标脉冲波形）
- 峰值脉冲功率 Ppp：600W @ 8.3ms
- 反向漏电流 Ir：5μA（在 Vrwm 条件下）
- 封装：DO-214AA（SMB）
三、功能与特点
- 高能量吸收：600W 的峰值脉冲功率和 30.2A 的峰值脉冲电流，能够在短时间内吸收由雷击或开关瞬变带来的大量能量。
- 优良钳位性能：在冲击发生时将电压限制在约 19.9V，保护下游器件免受过压损害。
- 低漏电流：5μA 的反向漏电流有利于在待机或精密电路中保持低功耗。
- 单向结构：适合用在有明确正负极的直流电源保护（如 12V 车载、工业电源等）。
四、典型应用场景
- 车载电子（12V 车载总线的浪涌保护）
- 工业控制设备的电源与信号线防护
- 通信设备、基站与终端的接口防雷
- 电源模块、逆变器与电机驱动侧的开关瞬态抑制
五、选型与电路布局建议
- 选型时以系统最大工作电压 Vrwm（此处 12V）为首要依据，VBR 与 VC 值需满足被保护电路的允许阈值。
- 布局上尽量将 SMBJ12A 放置在被保护器件与外来干扰源之间，靠近被保护端口，缩短 PCB 走线并减小环路电感。
- 对于需要多次承受高能浪涌的场合，可在器件旁设计熔断或限流元件（保险丝、PTC、串联阻抗）以延长寿命。
- 注意热量散逸：大脉冲下器件会产生热量，应保证良好铜箔散热或采用热过孔。
六、可靠性与注意事项
- DO-214AA（SMB）为常见表面贴装封装，适合自动贴装与回流焊。回流焊温度和时间应遵循厂方推荐曲线，避免超温导致器件性能下降。
- 长期静态超出 Vrwm 会增加漏电并缩短寿命，实际应用中应留有合适余量。
- 在关键安全场合或需要认证的系统中，请参考 Slkor 提供的完整数据手册与可靠性试验报告，确认环境与冲击波形（8.3ms 等）下的性能满足要求。
总结：SMBJ12A 以其 12V 等级的工作点、19.9V 的钳位能力和 600W 的脉冲能量吸收能力，是保护 12V 电源与相关接口免受短时高能瞬变的实用选择。选型与布局时应结合具体系统冲击特性与重复浪涌能力进行综合设计。
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