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TWGMC SMBJ26A TVS Diode SMBJ26A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TWGMC SMBJ26A
- Type
- TWGMC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TWGMC
- Electronic Component
- SMBJ26A
- Electronic Component
- 1
- Package
- SMB
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.153g
- Electronic Component
- 1
- Cj- Capacitor
- 390pF
- Electronic Component
- BM0227688439
- Operating Temperature
- 65℃~+150℃
- Voltage
- 42.1V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 31.9V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMBJ26A 产品概述
一、产品简介
SMBJ26A 是台湾TWGMC（台湾迪嘉）推出的一款单向瞬态抑制二极管（TVS），采用SMB封装，专为24V级电源及工业/汽车类瞬态浪涌保护设计。该器件在瞬态过电压事件（如雷击、开关瞬变、电磁脉冲）出现时迅速钳位电压，保护下游器件免受损坏。
二、主要技术参数
- 钳位电压（VC）：42.1V（典型，按标准脉冲测试条件）
- 工作温度：-65℃ ~ +150℃
- 击穿电压（VBR）：典型 31.9V，最小 28.9V（依据不同测试条件）
- 反向截止电压（Vrwm，稳压电压）：26V（稳态工作电压）
- 峰值脉冲功率（Ppp）：600W @ 10/1000µs
- 峰值脉冲电流（Ipp）：14.3A @ 10/1000µs
- 结电容（Cj）：≈390pF（影响高速信号路径）
- 反向泄漏电流（Ir）：≈1µA（在 Vrwm 条件下）
- 极性：单向
- 封装：SMB（表面贴装）
三、性能特点
- 高脉冲能量吸收能力：600W（10/1000µs）可承受典型雷击与开关浪涌能量。
- 低稳态泄漏：工作电压下漏电小，适合长期在线保护。
- 快速响应：TVS特性决定其在纳秒级响应瞬态，能迅速钳制过电压。
- 通用封装：SMB 封装便于自动贴装与散热处理，适合 PCB 大批量生产。
- 结电容中等偏大：约390pF，适合电源与低频信号线保护，但对高频/高速数据信号（如 USB/高速通信）可能产生影响。
四、典型应用场景
- 24V 工业电源总线和配电系统保护
- 通信基站、PLC、伺服驱动等工业控制设备输入端防护
- 汽车电子（非关键信号总线）和车载电源保护（注意符合汽车规范需额外确认）
- 变频器、继电器线圈及电源适配器防浪涌设计
五、封装与安装建议
- 推荐焊接工艺与SMB封装兼容的回流曲线，避免过高峰值温度影响器件可靠性。
- 在布局上将 TVS 置于被保护节点与接地之间，尽量缩短走线，减小寄生电感以提升钳位效果。
- 对于高能量冲击，建议在输入端配合熔断元件（保险丝）以防止连续冲击导致器件损坏。
- 结电容较大时，若用于信号线保护需评估对信号完整性的影响，必要时选用低容型TVS。
六、选型与注意事项
- 若系统稳态电压接近 24V，SMBJ26A（Vrwm=26V）为合适选择；需保证工作电压长期低于 Vrwm。
- 检查击穿与钳位曲线对应的测试条件，确认在目标浪涌波形下的钳位电压与剩余能量满足系统容忍度。
- 若应用在高速数据线或对寄生电容敏感的场合，考虑低 Cj 型或专用高速 TVS 器件替代。
- 在关键应用（如车规级）使用前，建议向供应商确认是否具备相应认证与可靠性试验数据。
如需封装尺寸图、典型 V–I 曲线或样片资料，我可协助提供或根据您实际电路给出更详细的布局与保护方案。
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