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TECH PUBLIC SMBJ5.0A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TECH PUBLIC SMBJ5.0A
- Type
- TECH PUBLIC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TECH PUBLIC
- Electronic Component
- SMBJ5.0A
- Electronic Component
- 1
- Package
- DO-214AA(SMB)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.192g
- Electronic Component
- 1
- Electronic Component
- BM0231019648
- Operating Temperature
- 55℃~+150℃
- Voltage
- 9.2V
- Current(Ir)
- 120uA
- Voltage(VBR)
- 7V
- 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.
SMBJ5.0A 产品概述
一、产品简介
SMBJ5.0A 为单向瞬态电压抑制二极管（TVS），由 TECH PUBLIC（台舟电子）生产，封装为 DO-214AA（SMB）。器件设计用于对 5V 工作电源及信号线进行瞬态过电压钳位保护，典型应用包括 USB、电源总线、工控及通信接口的浪涌抑制。工作温度范围宽（-55℃ ~ +150℃），适应工业环境温度要求。
二、主要电气参数及意义
- 反向工作电压 Vrwm：5V — 适配 5V 直流系统，正常工作时不导通。
- 击穿电压 Vbr：7V — 到达此电压开始进入雪崩区，标志保护动作起始。
- 钳位电压 Vc：9.2V（在 Ipp 条件下）— 在指定脉冲电流下的最大钳位电压，决定被保护设备承受的极限。
- 峰值脉冲电流 Ipp：65.2A @ 10/1000μs — 对应 10/1000μs 浪涌波形时的允许电流峰值。
- 峰值脉冲功率 Ppp：600W @ 10/1000μs — 指定波形下器件瞬态吸收功率能力。
- 反向电流 Ir：120μA — 在 Vrwm 下的漏电流，表明静态损耗小。
由上述参数可估算在 Ipp 条件下的钳位阻抗量级，约为 (Vc−Vbr)/Ipp ≈ 0.03Ω（典型值），体现较低的钳位阻抗和良好能量吸收能力。
三、典型应用场景
- USB、VoIP、路由器等 5V 电源总线保护；
- 工业控制与仪表中对供电及敏感模拟/数字信号的浪涌防护；
- 通信端口与接口防雷浪涌、继电器或电机切换产生的感性反向冲击；
注：用于汽车关键系统前请确认器件是否满足车规认证要求。
四、封装与热管理
DO-214AA（SMB）封装具有较好的脉冲功率承载能力与焊接可靠性。瞬态能量主要由结温升吸收，设计时需注意：
- PCB 布局时为器件提供良好散热路径，多铜厚铺与必要时热铜区域或热盲孔；
- 对于重复高能脉冲，需按制造商曲线进行能量/功率降额；单次冲击与重复冲击的寿命差异需评估。
五、选型与使用建议
- 选择 Vrwm 略高于系统最大静态电压以避免误触发；
- 将 TVS 紧靠被保护器件或电源入口焊接，确保最短的走线与低阻抗回流；
- 单向器件注意极性（阴极接到需防护的一侧，阳极接地）；
- 对于对残压敏感的电路，可配合串联阻抗（阻容或熔断器）限制通过电流并改善浪涌分配；
- 在需要极低漏电或高频特性的场合，进一步参考器件电容规格与温度特性。
六、可靠性与检验
建议在设计验证阶段进行实物浪涌测试（10/1000μs 波形）与温度循环、湿度应力测试，以确认在目标应用下的稳定性。长期使用应注意反复冲击后的性能退化与焊点可靠性。
七、订购信息
型号：SMBJ5.0A
品牌：TECH PUBLIC（台舟电子）
封装：DO-214AA（SMB）
类型：单向 TVS 二极管
在采购与最终设计前，请索取并核对完整数据手册以获得更详细的电气特性曲线、封装尺寸及焊接工艺要求。
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