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BORN SMAJ22A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN SMAJ22A
- Type
- BORN
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- SMAJ22A
- Electronic Component
- 1
- Package
- DO-214AC
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.115g
- Electronic Component
- 1
- Electronic Component
- BM0258759998
- Voltage
- 35.5V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 24.4V
- 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.
SMAJ22A 产品概述
一、产品简介
SMAJ22A 是一款单向（unidirectional）瞬态抑制二极管（TVS），由 BORN（伯恩半导体）提供，采用 DO-214AC（SMA）封装，针对交流和直流线路中的瞬态过压事件提供高效钳位保护。该器件设计用于吸收电感性负载开关、雷击感应或电源浪涌产生的短时脉冲能量，保护下游敏感电子元件免受损害。
二、主要参数
- 极性：单向
- 反向截止电压 Vrwm：22 V
- 击穿电压（Vbr）：24.4 V
- 钳位电压（Vc，典型）：35.5 V
- 峰值脉冲电流 Ipp：11.3 A（对应 Ppp 条件）
- 峰值脉冲功率 Ppp：400 W（10/1000 μs 波形）
- 反向漏电流 Ir：1 μA（常温条件下）
- 类型：TVS（瞬态电压抑制）
- 封装：DO-214AC（SMA）
三、性能特点与优势
- 高能量吸收：在 10/1000 μs 浪涌测试条件下可承受 400 W 峰值功率，适合电源线与较长电缆引入的能量型浪涌防护。
- 有效钳位：典型钳位电压 35.5 V，可在过压事件时将线路电压限制在器件和系统可承受的范围内。
- 低漏电流：典型反向漏电流 1 μA，保证在正常工作状态下对电源负担小，适用于对静态功耗敏感的电路。
- 单向结构：对直流供电或有明确极性的线路提供更低导通压降和更稳定的钳位特性（相对于双向器件）。
四、典型应用
- 开关电源输入与输出保护
- 通信设备（以太网、串口等）电源浪涌防护（注意选择对应接口匹配）
- 工业控制、楼宇自控与电表等长期在线设备的输入端过压保护
- 汽车电源旁路（需验证工作温度和汽车级要求）
- 任何需要在限定电压下吸收能量型脉冲的直流供电场合
五、封装与安装建议
- DO-214AC（SMA）为常见表贴封装，易于自动贴装与回流焊；器件通常带有极性标识（阴极条），安装时注意方向以确保单向保护功能正确。
- 建议将 TVS 器件尽可能靠近被保护元件或浪涌源端放置，以减少走线电感带来的额外电压尖峰。
- 回流焊工艺需遵循器件厂商推荐的温度曲线，避免过高温度或过长加热时间导致性能退化。
六、使用注意事项与可靠性建议
- Ppp 标称基于单次或短时间脉冲（10/1000 μs），若出现重复或更高能量的脉冲，应考虑级联保护、增加串联阻抗或选择更高能量等级器件进行可靠性设计。
- 钳位电压为典型值，实际钳位会受环境温度与脉冲形状影响，设计时留有足够的安全余量以保护后级器件。
- 在高湿、高腐蚀或振动环境中应用时，应结合封装保护与 PCB 密封方案，确保长期可靠性。
- 对于严格的车规或医疗级应用，应向供应商确认额定温度范围、认证状态及批次测试报告。
本概述基于器件主要电气参数与封装信息，供方案选型与初步设计参考。实际设计时建议参考原厂完整数据手册与浪涌试验曲线，并在目标系统中进行样件验证测试。
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