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TWGMC SMAJ26A TVS Diode SMAJ26A
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TWGMC SMAJ26A
- Type
- TWGMC
- Minimum package
- 5000 卷
Technical parameters
- Electronic Component
- TWGMC
- Electronic Component
- SMAJ26A
- Electronic Component
- 1
- Package
- DO-214AC
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.1g
- Electronic Component
- 1
- Electronic Component
- BM0225200686
- Operating Temperature
- 65℃~+150℃
- Voltage
- 42.1V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 31.9V
- Electronic Component
- Electronic Component
- Electronic Component
- 5000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ26A 产品概述
一、产品简介
SMAJ26A 是 TWGMC（台湾迪嘉）生产的一款单向瞬态抑制二极管（TVS），封装为 DO-214AC（SMA）。它用于对抗静电放电（ESD）和电网浪涌，能够在短脉冲事件中将电压钳位在安全范围内，保护下游敏感器件不受过压损坏。
二、主要参数说明
- 钳位电压（Vc）：42.1 V（在规定测试条件下）
- 工作温度：-65 ℃ 到 +150 ℃
- 击穿电压（Vbr）：31.9 V
- 反向截止电压（Vrwm，稳压工作电压）：26 V
- 峰值脉冲功率（Ppp）：400 W @ 10/1000 μs
- 峰值脉冲电流（Ipp）：9.5 A @ 10/1000 μs
- 反向漏电流（Ir）：1 μA（在 Vrwm 下）
- 极性：单向（适用于 DC 或有明显正负极性需求的线路）
三、性能与工作原理
SMAJ26A 在正常工作时以 Vrwm = 26 V 的反向偏压存在，漏电流极小（1 μA），不影响电路正常工作。当出现浪涌或静电脉冲时，器件进入雪崩区并迅速导通，将瞬态能量钳位在 42.1 V 附近，保护后级元件。其 10/1000 μs 的 400 W 能量吸收能力适合工业供电和通信接口的浪涌防护。
四、典型应用场景
- 电源输入、直流电源线保护（DC 24V 及相近系统）
- 通信接口、串行总线防护（RS-485、CAN 等）
- 工业设备、楼宇自动化、仪表的浪涌与雷击能量抑制
- 继电器、驱动器输入端的过压保护
五、封装与安装建议
- 封装：DO-214AC（SMA），标记通常在器件顶部，阴极一端有标识条。
- 布局：靠近被保护端口或连接器放置，走线短且宽以减小感抗与热阻；器件靠地的一侧应有低阻抗回流路径（大铜箔）。
- 散热：在反复冲击或高能量环境下，注意在 PCB 增加铜箔散热面积和必要的热沉。
- 焊接：遵循 DO-214AC 的回流与手工焊接温度曲线，避免过热损伤封装。
六、选型与注意事项
- 若系统工作电压接近 26 V，应预留足够裕量，确保正常稳态下不触发导通。
- 单向器件适用于有明确直流极性的线路；若需双向浪涌保护，应选用双向 TVS。
- 对于更大或更多次的冲击，考虑并联或在上游串联熔断器/限流元件以限制能量。
- 校核系统最大浪涌波形（如 8/20 μs、10/1000 μs）与器件额定脉冲能量，必要时选择更高 Ppp 等级的器件。
SMAJ26A 以其高能量吸收能力、宽温度范围与标准 SMA 封装，适合工业级浪涌与静电防护应用。在应用设计中注意版图与热管理，可获得稳健可靠的过压保护效果。
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