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DOWO SMAJ90A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMAJ90A
- Type
- DOWO
- Minimum package
- 5000
Technical parameters
- Electronic Component
- DOWO
- Electronic Component
- SMAJ90A
- Electronic Component
- 1
- Package
- DO-214AC
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.14g
- Electronic Component
- 1
- Electronic Component
- BM0258760008
- Voltage
- 146V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 100V
- Electronic Component
- 5000
- Power(Ppp)
- 400W@10/1000us
- Current(Ipp)
- 2.74A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ90A — DOWO(东沃) 单向瞬态抑制二极管产品概述
一、产品简介
SMAJ90A 为 DOWO（东沃）系列单向 TVS（瞬态电压抑制器）二极管，采用 DO-214AC（SMA）表面贴装封装，设计用于在瞬态过压（如雷击、开关瞬变、静电放电等）出现时迅速钳位电压，保护敏感电子器件与电路。该器件额定反向工作电压（Vrwm）为 90V，典型击穿电压约 100V，属高耐压类别的瞬态抑制元件。
二、主要电气参数
- 极性：单向（Unidirectional）
- 反向工作电压 Vrwm：90V
- 击穿电压 Vbr：约 100V
- 钳位电压 Vclamp（Ipp 条件下）：146V
- 峰值脉冲电流 Ipp：2.74A（脉冲波形 10/1000μs）
- 峰值脉冲功率 Ppp：400W（10/1000μs）
- 反向漏电流 Ir：典型 1μA（在 Vrwm 条件下测得）
三、产品特点与优势
- 高耐压、低漏电：90V 的反向截止设计适用于较高工作电压系统，同时低至 1μA 的漏电有利于保持电路静态功耗低。
- 强能量吸收：在标准 10/1000μs 浪涌条件下可承受 400W 峰值功率，能有效应对中等能量级的冲击浪涌。
- 快速响应：TVS 器件在纳秒级别响应突发过压，实现瞬态钳位，保护后端半导体器件。
- 表面贴装封装（DO-214AC）：适配自动贴片与回流焊工艺，利于生产效率与可靠性。
四、典型应用场景
- 工业电源与逆变器输入保护（DC 公母线、直流伺服驱动）
- 通信设备与基站、交换机电源浪涌防护
- 汽车电子辅助电源（非直接车规认证环境下的抗浪涌保护）
- 逆变器、太阳能系统、UPS 和电源模块的端子防护
- 各类需要对 90V 级别工作电压做瞬态保护的电路
五、使用建议与注意事项
- PCB 布局：将 TVS 尽量靠近被保护端口或连接点，采用宽短走线以降低串联电感，必要时配合旁路电容和熔断器使用。
- 热管理：在高能量冲击频繁的应用中，应考虑器件热耗散与周边散热条件，避免连续脉冲导致过热。
- 安装与回流焊：遵循 DO-214AC 的回流焊温度曲线与厂家推荐的焊接工艺，避免超温或机械应力导致封装损伤。
- 选型匹配：确认系统最大工作电压、允许钳位电压及预计冲击能量，若系统有更高冲击需求，请选择更高 Ppp/ Ipp 等级的型号。
SMAJ90A 提供了在 90V 级别下可靠、快速的瞬态抑制能力，是需要中等能量冲击防护场合的实用选择。如需更详细的电气曲线、尺寸图或产品生命周期与可靠性数据，可联系 DOWO（东沃）或其授权分销渠道获取完整数据手册。
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