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MDD SMBJ51CA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MDD SMBJ51CA
- Type
- MDD
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MDD
- Electronic Component
- SMBJ51CA
- Electronic Component
- 1
- Package
- SMB(DO-214AA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.19g
- Electronic Component
- 1
- Electronic Component
- BM0227773504
- Operating Temperature
- 65℃~+150℃
- Voltage
- 82.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 62.7V
- 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.
SMBJ51CA 产品概述
一、产品简介
SMBJ51CA 是 MDD 推出的双向瞬态抑制二极管（TVS），封装为 SMB（DO-214AA），用于抑制瞬态过电压和浪涌脉冲。器件为双向结构，能在正负两极产生对称的钳位，适合交流或双向脉冲保护场合。
二、关键参数
- 极性：双向
- 反向截止电压（Vrwm）：51 V（建议工作电压不超过此值）
- 击穿电压（Vbr）：62.7 V（典型）
- 钳位电压（Vc）：82.4 V（在 Ipp 条件下）
- 峰值脉冲电流（Ipp）：7.3 A @ 10/1000 μs
- 峰值脉冲功率（Ppp）：600 W @ 10/1000 μs
- 反向漏电流（Ir）：1 μA（典型）
- 工作温度范围：-65 °C ~ +150 °C
- 封装：SMB (DO-214AA)
三、典型应用场景
- 48V 点到点通信与电源母线保护（例如通信基站、PoE 变种）
- 串行总线和差分信号线的浪涌保护（具有正负极脉冲的环境）
- 工业设备、测控仪表、汽车电子（需注意汽车级认证）中的瞬态浪涌抑制
- 输入端滤波后对高能量脉冲（雷击、开关瞬变）进行保护
四、设计与使用建议
- 放置位置：尽量靠近受保护线路的输入端或接口，缩短 PCB 走线，降低环路电感。
- 散热与焊接：SMB 封装通过焊盘散热，确保焊盘与走铜足够，必要时在背面加大铜厚或使用散热槽。
- 电压匹配：Vrwm（51 V）应高于正常工作电压，避免在稳态下进入击穿区；若用于单向直流电源，建议选用单向型 TVS。
- 浪涌能力：标注的 10/1000 μs 波形用于能量较大的工业浪涌评估，重复冲击需考虑热累积并适当降额使用或加串联阻抗。
- 漏电流与漂移：Ir 为 1 μA，适合对静态漏电敏感的电路，但在高温或长时间老化下应验证漏电变化。
五、可靠性与采购注意
- 工作温度范围宽（-65~150 °C），适应恶劣环境，但高温下漏电和击穿特性会有漂移，需在设计中留裕量。
- 采购时确认批次和原厂认证，若用于关键或车规场合需索取相关测试报告（HTOL、ESD、 surge 测试）。
- 存储与焊接遵循潮湿敏感器件（MSL）规范，建议在推荐回流温度范围内焊接，避免过高温度导致封装应力或性能退化。
该器件适用于需要中高能量浪涌钳位且对双向保护有要求的场合，是保护 48V 级别电源和差分信号链路的常用选择。
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