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TECH PUBLIC SMBJ28A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TECH PUBLIC SMBJ28A
- Type
- TECH PUBLIC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TECH PUBLIC
- Electronic Component
- SMBJ28A
- 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
- BM0231019646
- Operating Temperature
- 55℃~+150℃
- Voltage
- 45.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 34.4V
- 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.
SMBJ28A 产品概述
一、产品简介
SMBJ28A（品牌：TECH PUBLIC / 台舟电子）为单向瞬态电压抑制器（TVS）封装款式，采用DO-214AA（SMB）外形。器件设计用于在电源、电信及工业控制等系统中快速钳位瞬态过电压，保护敏感电子元件免受雷击、浪涌或开关瞬变的损害。
二、主要参数
- 极性：单向
- 反向截止电压 Vrwm：28 V
- 击穿电压 Vbr：34.4 V
- 钳位电压 Vc（典型）：45.4 V
- 峰值脉冲电流 Ipp：13.2 A（10/1000 µs 波形）
- 峰值脉冲功率 Ppp：600 W（10/1000 µs 波形）
- 反向漏电流 Ir：1 µA（典型）
- 工作温度范围：-55 ℃ ～ +150 ℃
- 封装：DO-214AA（SMB）
三、关键特性与工作原理
该器件在正常工况下以反向截止电压（Vrwm）处于阻断状态，当系统出现大幅瞬态过电压使反向电压上升至击穿电压（Vbr）时，器件导通并将电压钳位在约45.4 V 的水平，同时吸纳脉冲能量。单向结构适合直流供电或有明确极性的线路保护。10/1000 µs 波形下的13.2 A 峰值脉冲能力及600 W 的脉冲功率表明其对雷击后级浪涌有良好吸收能力。
四、典型应用领域
- 电源线路与DC母线保护
- 通信设备与数据接口防护
- 汽车电子（满足宽温区工作）
- 工业控制与仪器设备的过电压防护
五、封装与可靠性
DO-214AA（SMB）封装便于自动焊接与波峰/回流焊工艺，热阻和机械强度适合工业环境。工作温度范围 -55 ℃ 至 +150 ℃，适应严苛温度与振动场景。
六、安装与使用注意事项
- 选型时按实际系统的最大允许工作电压与钳位电压匹配，确保在浪涌情况下被保护的元件不会超过其极限。
- PCB 布局应尽量缩短 TVS 到被保护引脚的走线，降低寄生电感以获得更好钳位效果。
- 对于重复脉冲或高能环境，需评估器件的热耗散能力并考虑并联或采用更高能量等级的器件。
- 存储与焊接注意避免超出封装温度和湿度规范。
该 SMBJ28A 适合要求中等能量吸收、需单向保护且受限于 SMB 尺寸的场合。若需更高脉冲电流或更紧钳位电压，可参考同系列或更高功率等级产品。
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