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Brightking SMBJ45A/TR13 SMBJ45A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Brightking SMBJ45A / TR13
- Type
- BRIGHTKING
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Brightking
- Electronic Component
- SMBJ45A/TR13
- Electronic Component
- 1
- Package
- SMB(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
- BM0264590357
- Voltage
- 72.7V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 50V
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMBJ45A/TR13 (Brightking 台湾君耀) — 单向 TVS 二极管 产品概述
一、产品简介
SMBJ45A/TR13 是 Brightking（台湾君耀）出品的单向瞬态电压抑制（TVS）二极管，采用 SMB (DO-214AA) 封装，面向中等能量浪涌保护场合。器件设计用于在瞬态过压发生时迅速钳位并吸收冲击能量，保护下游敏感电子元件免受浪涌或浪涌引起的损伤。
二、主要电气参数
- 极性：单向
- 反向截止电压 Vrwm：45V
- 击穿电压 VBR：50V（典型测试点）
- 钳位电压（Ipp 时）：72.7V
- 峰值脉冲电流 Ipp：8.3A
- 峰值脉冲功率 Ppp：600W（器件额定峰值波形由厂商资料定义）
- 反向漏电流 Ir：1μA（常温，Vrwm 条件下）
以上参数为典型器件规格，具体测试条件与最大允许公差请参见完整数据手册。
三、电气特性说明
Vrwm 45V 表示器件在正常工作情况下可承受的最大工作电压，VBR（约50V）为进入雪崩导通的击穿电压区间，Ipp 与 Ppp 表明在标准浪涌测试条件下器件的吸收能力及钳位行为。单向结构在正向导通时表现为低压降二极管特性，反向时作为稳压/钳位元件工作。
四、典型应用场景
- DC 电源总线过压与浪涌保护（适用于额定工作电压≤45V 的系统，如 24V/36V 等）
- 工业自动化与控制器、变频器输入端防护
- 通信设备、网络设备的电源与接口线路保护
- 消费电子与电源模块对浪涌和雷击脉冲的局部防护
五、选型与使用建议
- 若系统标称电压接近或高于 48V，应谨慎选择：45V Vrwm 器件更适合 ≤45V 的应用场合；48V 系统通常建议选用更高 Vrwm 的器件。
- 注意钳位电压与被保护元件允许承受的最大电压匹配，钳位 72.7V 为在指定 Ipp 下的典型值。
- 考虑 PCB 布局和散热：靠近受保护点放置、增大铜箔散热区域可提高浪涌能量承受能力与可靠性。
- 关注漏电流 Ir 对灵敏线路的影响（1μA 为典型值），在高阻线路或计量电路中需评估。
六、封装与可靠性
SMB (DO-214AA) 为表面贴装封装，便于自动化贴装与批量生产。封装具备良好热容散能力，适配中等脉冲能量吸收。具体焊接工艺与回流温度曲线请遵循厂商推荐，以保证长期可靠性。
七、安装与注意事项
- 采用合适的焊接温度曲线，避免过热导致器件性能退化。
- 建议在靠近被保护线路的信号入口或电源入口处布置 TVS 元件，缩短回流路径以降低串联感抗。
- 对于频繁浪涌环境，需评估器件重复浪涌能力并考虑冗余或分级保护策略。
八、结论
SMBJ45A/TR13 提供了 Vrwm=45V、Ppp=600W 级别的单向浪涌保护，钳位性能和低漏电流使其适合保护中等电压直流系统与工业、通信类设备的局部过电压事件。最终选型应结合实际工作电压、允许钳位电压和系统热管理需求，必要时参照完整数据手册或与供应商沟通具体测试条件与可靠性数据。
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