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BORN SMBJ51A
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN SMBJ51A
- Type
- BORN
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- SMBJ51A
- Electronic Component
- 1
- Package
- DO-214AA(SMB)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.191g
- Electronic Component
- 1
- Electronic Component
- BM0229259057
- Voltage
- 82.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 56.7V
- 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.
SMBJ51A（BORN）产品概述
一、产品简介
SMBJ51A 是 BORN（伯恩半导体）推出的一款单向瞬态电压抑制二极管（TVS），封装为 DO-214AA（SMB）。该器件专为抑制工业及通信电源线路上的瞬态过压和冲击浪涌而设计，能在短时脉冲事件中将过电压钳位到安全水平，保护后端电路元件不受损坏。
二、主要电气参数
- 额定反向工作电压 Vrwm：51 V（反向截止电压）
- 击穿电压（Vz）：56.7 V
- 钳位电压 Vc：82.4 V（在指定冲击条件下）
- 峰值脉冲功率 Ppp：600 W @ 10/1000 μs 波形
- 峰值脉冲电流 Ipp：7.3 A
- 反向漏电流 Ir：典型 1 μA（在 Vrwm 下）
- 极性：单向（适用于直流侧或单极保护场合）
- 类型：TVS 瞬态抑制二极管
三、主要特性与优势
- 高能量吸收能力：在标准 10/1000 μs 浪涌波形下可承受 600 W 的峰值功率，适合工业雷击和开关瞬态防护。
- 低漏电流：Vrwm 下漏电流极小，有利于低功耗系统长期工作。
- 明确的钳位能力：在 7.3 A 峰值脉冲下钳位电压约为 82.4 V，可有效限制过电压幅度。
- 封装成熟可靠：DO-214AA（SMB）封装便于手工和自动贴装，同时具有良好的散热能力。
四、典型应用场景
- 工业电源总线和直流母线保护（48 V 或类似电压系统）
- 通信基站电源、光纤收发器、电源适配器输入端防护
- 汽车辅助电源或车载电子（需注意汽车级认证时参考厂方数据）
- 工控设备、变频器接口、继电器驱动电路等可能出现浪涌的场合
五、封装与安装建议
- 封装：DO-214AA（SMB），便于波峰/回流焊和手工焊接。
- PCB 布局：将 TVS 尽可能靠近被保护端口放置，走线最短以降低寄生电感；使用适当的散热铜箔和过孔以改善热性能。
- 焊接工艺：遵循器件制造商的回流温度曲线，避免过热导致器件性能下降。
六、选型与使用建议
- 若待保护电路的正常工作电压接近或高于 Vrwm，应选择更高 Vrwm 的型号以避免误触发。SMBJ51A 的 Vrwm 为 51 V，适用于 48 V 等级的直流系统。
- 对于需多次承受大能量冲击的应用，应根据浪涌频率和能量进行能量累积评估并考虑冗余或更高能量等级的 TVS。
- 注意钳位电压与被保护器件耐压的匹配，确保钳位后电压仍在被保护器件可承受的范围内。
七、可靠性与注意事项
- 定期评估受保护电路在实际环境中的浪涌暴露情况，必要时更换可能已受损的 TVS。
- 器件在吸收大冲击后可能发生不可逆变化，建议关键系统采用冗余或级联保护方案。
- 使用前请参考 BORN 的完整数据手册获取温度特性、功率降额曲线和机械尺寸，以确保设计满足长期可靠性要求。
备注：以上参数基于提供的基础数据。为获得全面设计依据，请参阅 BORN 官方技术资料与样片测试结果。
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