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Jingdao Microelectronics SMDJ90A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic SMDJ90A
- Type
- Jingdao Microelectronics
- Minimum package
- 3000
Technical parameters
- Electronic Component
- Electronic
- Electronic Component
- SMDJ90A
- Electronic Component
- 1
- Package
- DO-214AB
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.381g
- Electronic Component
- 1
- Electronic Component
- BM0264717922
- Operating Temperature
- 65℃~+150℃
- Voltage
- 146V
- Current(Ir)
- 2uA
- Voltage(VBR)
- 111V
- Electronic Component
- 3000
- Power(Ppp)
- 3kW@10/1000us
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMDJ90A 产品概述
一、概述
SMDJ90A（晶导微电子）是一款单向瞬态抑制二极管（TVS），封装为SMC/DO-214AB，专为静电放电（ESD）及雷击/浪涌（Surge）保护而设计。器件在瞬态能量冲击下具有快速响应和高能量吸收能力，适合用于需保护90V等级直流/直流母线及信号/电源接口的工业、通信与电力电子设备。
二、主要参数
- 极性：单向（Unidirectional）
- 反向截止电压 Vrwm：90 V（工作耐受电压）
- 击穿电压 VBR：111 V（典型）
- 钳位电压 Vc：146 V（Ipp 条件下）
- 峰值脉冲电流 Ipp：20.5 A（10/1000 µs 波形）
- 峰值脉冲功率 Ppp：3000 W @ 10/1000 µs
- 反向电流 Ir：2 µA（在 Vrwm 条件下）
- 工作温度范围：-65 ℃ ~ +150 ℃
- 封装：DO-214AB（SMC）
- 类型：TVS（静电与浪涌保护）
- 品牌：晶导微电子
三、特性与优势
- 高瞬态能量吸收能力（3 kW@10/1000 µs），能有效钳位高能脉冲，保护下游元件。
- 低钳位电压（146 V），在规定电流下限制电压上升，减少被保护电路应力。
- 极低反向泄漏（2 µA），在正常工作下对系统无显著负载。
- 宽工作温度范围与SMC封装，适应工业级环境与稳健的机械安装要求。
- 单向结构适合直流供电或需单极性保护的场合，响应快速、可靠性高。
四、典型应用
- 电源输入与直流母线保护（适合90 V及以下系统）
- 通信设备接口、收发模块浪涌保护
- 工业控制设备、PLC、电机驱动器抗雷击与浪涌防护
- 基站、电源分配与逆变器等需要高能量吸收的场合
五、设计与安装注意事项
- 尽量靠近被保护端口或连接器放置，以缩短引线长度并降低串联阻抗。
- 对于长线路或高能量场合，建议与熔断器、限流电阻或多级保护方案配合使用以分担能量。
- PCB布局应提供良好散热路径，SMC封装底部与附近铜箔、热铆或散热层相连可提升热耗散能力。
- 焊接与回流按SMC/DO-214AB推荐工艺执行，避免过高峰值温度和过长潮湿暴露。
- 单向器件有极性标识，安装时确认方向以实现正确的钳位行为。
六、选型与可靠性建议
- 选型时Vrwm应高于系统工作电压并留有余量，以避免持续偏压下损耗过大；同时钳位电压需低于被保护元件可承受的最大电压。
- 在预计脉冲能量高于器件额定时，采用多器件并联/串联或外加限流措施以延长寿命。
- 适配相应的行业抗扰度标准（如 IEC 61000 系列），并在实际应用中通过实验验证保护效果。
- 关注温度与长期重复脉冲对器件热击穿及可靠性的影响，进行必要的热仿真与加速寿命试验。
总结：SMDJ90A 为高能量单向TVS器件，适用于90V等级系统的浪涌与静电保护，具有低泄漏、高钳位性能和工业级温度适应性。在实际应用中合理布局、匹配保护策略与热管理，可获得稳定可靠的防护效果。
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