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GOODWORK SMAJ48A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- GOODWORK SMAJ48A
- Type
- GOODWORK
- Minimum package
- 2000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- GOODWORK
- Electronic Component
- SMAJ48A
- Electronic Component
- 1
- Package
- DO-214AC(SMA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.095g
- Electronic Component
- 1
- Electronic Component
- BM0257528030
- Operating Temperature
- 55℃~+150℃
- Voltage
- 77.4V
- Current(Ir)
- 5uA
- Voltage(VBR)
- 53.3V
- 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.
SMAJ48A（GOODWORK 固得沃克）产品概述
一、产品简介
SMAJ48A 是 GOODWORK（固得沃克）出品的一款单向瞬态电压抑制器（TVS），采用 DO-214AC（SMA）封装，专为中低电压直流供电系统和数据/信号线的浪涌保护设计。器件具有较低的反向漏电流、较高的瞬态吸收能力和宽的工作温度范围，适合在恶劣电磁环境下保护被保护线路和敏感电子元件免受雷击、电源切换和电磁干扰引起的瞬态过电压损害。
二、主要电气参数
- 极性：单向（有明确的阴极标识）
- 反向截止电压 Vrwm：48 V
- 击穿电压（典型）：53.3 V
- 钳位电压 Vc（在峰值脉冲条件下）：77.4 V
- 峰值脉冲电流 Ipp：5.2 A
- 峰值脉冲功率 Ppp：400 W（厂商测试条件下）
- 反向电流 Ir：5 μA
- 工作结温范围 Tj：-55 ℃ ～ +150 ℃
- 封装：DO-214AC（SMA）
以上参数反映了器件在规定测试条件下的电气特性，实际系统使用时请参考厂商数据手册以获取完整的测试条件与典型曲线。
三、典型应用场景
- 直流48V供电轨（通讯设备、电源模块、基站设备）的过压浪涌防护
- 工业控制和自动化系统的电源及信号接口保护
- 电源入口、DC-DC 转换器输入侧以及继电器/接触器附近的浪涌吸收
- 各类电子设备在电源浪涌或开关瞬变环境中的防护元件
四、封装与机械特性
SMA（DO-214AC）封装体积小、焊接方便，适合自动贴片及波峰回流工艺。器件阴极带有明显标识，便于在电路板上正确放置。SMA 封装散热受限，设计 PCB 布局时应考虑热量传导和焊盘散热能力。
五、选型与使用建议
- 选型时优先保证 Vrwm ≥ 系统工作电压，并留有适当裕量（常见取 10%~30%），以防止在正常波动情况下触发钳位。
- 钳位电压应低于被保护器件（例如功率器件、控制芯片）的耐压极限，以确保有效保护。
- 高能量冲击时可配合串联电阻、熔断器或更大能量吸收器件共同使用，提高整体浪涌承受能力。
- PCB 布局：将 TVS 放置在需保护端口附近，导线尽可能短且粗，减少寄生电感；为提高散热，可在焊盘下方或周围使用热铜孔/散热面。
- 环境与可靠性：在高温或频繁冲击场合，关注器件结温与累计能量吸收能力，必要时选择更高功率等级或并联多只器件分担能量。
六、总结
SMAJ48A 凭借单向工作模式、48V 反向截止电压、约 77.4V 的钳位电压与 400W 的瞬态功率能力，是保护 48V 级别电源轨和相关接口的实用方案。合理的选型与良好的 PCB 热、电布局能显著提升保护效果与系统可靠性。欲获得完整电气特性曲线、测试波形和安规/可靠性认证信息，请参考 GOODWORK 官方数据手册或咨询厂商技术支持。
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