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MDD SMAJ20CA
Configuration
1 options
Configuration
Option 138079
Availability on request
Technical data
Product details
19
specifications
Core information
- Product name
- MDD SMAJ20CA
- Type
- MDD
- Minimum package
- 5000
Technical parameters
- Electronic Component
- MDD
- Electronic Component
- SMAJ20CA
- Electronic Component
- 1
- Package
- DO-214AC
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.094g
- Electronic Component
- 1
- Electronic Component
- BM0227782713
- Operating Temperature
- 65℃~+150℃
- Voltage
- 32.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 24.5V
- Electronic Component
- 5000
- Power(Ppp)
- 400W@10/1000us
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ20CA 产品概述
一、产品简介
SMAJ20CA 为 MDD 推出的双向瞬态电压抑制二极管（TVS），采用 DO-214AC（SMA）封装，专为汽车、通信、电源及工业控制等系统的浪涌保护设计。器件在短时脉冲（10/1000 μs）条件下具备较高的吸收能量能力，可快速钳位过电压，保护下游半导体与敏感负载。
二、主要电气参数
- 类型：双向 TVS
- 标称反向工作电压 Vrwm：20 V
- 击穿电压（Vz）：24.5 V
- 钳位电压（Vc）典型值：32.4 V（在指定测试条件下）
- 峰值脉冲功率 Ppp：400 W（10/1000 μs）
- 峰值脉冲电流 Ipp：12.3 A
- 反向电流 Ir：典型 1 μA（标注中亦有 20 μA 的极限值，见下文说明）
- 工作温度范围：-65 ℃ ～ +150 ℃
- 极性：双向
- 品牌/封装：MDD / DO-214AC
说明：原始信息中存在不一致项（如“VWM:400V”与 Vrwm=20V 相冲突，以及漏电流有 1 μA 与 20 μA 两种标注）。本文技术讨论以 Vrwm=20 V、击穿 24.5 V、钳位 32.4 V 为准；最终采购与认证请以厂方数据表为准。
三、典型性能与应用场景
- 瞬态抑制能力强：400 W（10/1000 μs）能量吸收能力适合对付汽车负载开关、雷击感应及电源浪涌等低频能量脉冲。
- 钳位低且响应快：在指定脉冲下钳位至约 32.4 V，能有效限制电压尖峰，减轻后级器件应力。
- 双向保护：适用于直流与交流线路的双向过压保护场合，例如汽车信号线、RS-485、CAN 总线及交流供电线路。
- 宽温耐受：-65 ℃ 至 +150 ℃ 的工作温度范围满足汽车电子与恶劣环境需求。
四、封装与可靠性
DO-214AC（SMA）封装具有良好的散热与机械强度，便于自动贴装与回流焊接。MDD 品牌器件在热稳定性与冲击试验中通常表现可靠，但特定应用下仍应关注焊盘设计、热阻与过流保护配合。
五、选型与使用建议
- 若系统长期工作于较大环境温度或有反复浪涌，建议适当留余量，验证钳位电压在最坏条件下不会超出被保护器件耐受值。
- 对于漏电流敏感电路，采购前需与厂家确认 Ir 的典型与最大值（信息源存在 1 μA 与 20 μA 两种标注）。
- 安装时注意方向与走线阻抗，尽量将 TVS 靠近受保护端口布置以缩短回路及降低串联电感。
- 在并联使用或多点保护时，确认脉冲能量分配与热管理，避免单个器件承受超规格能量。
总结：SMAJ20CA 是一款适用于多种工业与汽车浪涌保护场合的双向 TVS 器件，兼具较高脉冲能量承受能力与紧凑封装。最终选型与可靠性验证请依据官方数据手册与实际测试结果。
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