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MDD SMAJ18CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MDD SMAJ18CA
- Type
- MDD
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MDD
- Electronic Component
- SMAJ18CA
- Electronic Component
- 1
- Package
- SMA(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
- BM0229465216
- Operating Temperature
- 65℃~+150℃
- Voltage
- 29.2V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 22.1V
- 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.
SMAJ18CA（18V）SMA封装 TVS 二极管 产品概述
一、产品简介
SMAJ18CA 是 MDD 出品的一款双向瞬态电压抑制二极管（TVS），封装为 SMA（DO-214AC）。该器件针对电脉冲和浪涌保护设计，能在瞬时高能冲击下迅速钳位电压，保护敏感电子元件不受过压损害。典型应用包括电源输入保护、通信接口和工业控制浪涌防护。
二、主要电气参数
- 钳位电压（Vc）：29.2 V（典型/测试条件见厂商资料）
- 工作反向电压（Vrwm）：18 V（稳态耐受电压）
- 击穿电压（Vbr）：22.1 V（击穿起始范围）
- 峰值脉冲功率（Ppp）：400 W，测试脉冲波形 10/1000 µs
- 峰值脉冲电流（Ipp）：13.7 A（在 10/1000 µs 脉冲时）
- 反向漏电流（Ir）：1 µA（在 Vrwm 条件下）
- 极性：双向（适用于交流或双向浪涌）
- 工作温度范围：-65 ℃ ～ +150 ℃
三、特点与优势
- 双向结构可在正、负极性脉冲下工作，适合交流路径或无极性线路保护。
- 400W/10/1000µs 的能量级别对雷击感应、配电瞬态等中低能量浪涌有良好吸收能力。
- 低反向漏电（1 µA）确保在正常工作时对电路影响极小，适用于对静态功耗敏感的系统。
- 宽温度范围适合汽车电子、工业控制等苛刻环境使用。
四、应用场景
- 车辆电源线与车载电子设备的瞬态过压保护（应确认系统电压与 Vrwm 匹配）。
- 通信基站、交换设备的线路浪涌防护，尤其是需要 10/1000µs 能量吸收的场合。
- 工业控制器、电源模块、逆变器及配电柜等可能遭受雷击或开关过渡的系统。
五、选型与使用注意
- 选型时确保 Vrwm（18V）高于正常工作电压并有一定余量；若保护 12V 或 15V 系统，SMAJ18CA 常为合适选择。
- 钳位电压 29.2V 表示浪涌发生时最大电压近似值，设计时需评估下游元件能否承受该电压。
- 推荐在被保护线路近源端安放 TVS，保持焊盘与导线最短路径以降低感抗与串联阻抗。
- 对于高能量或反复浪涌场合，应配合熔断器、PTC 或串联电阻使用，以分担能量并提升寿命。
六、封装与可靠性
SMA（DO-214AC）为表贴型封装，便于自动化贴装与回流焊工艺。器件耐温范围和浪涌能量使其在严苛环境下保持可靠性，但长期稳定性与寿命应结合实际冲击频次与系统热设计评估。
如需更详尽的曲线数据（钳位随电流变化、能量吸收曲线、瞬态响应时间等）或封装引脚图与回流建议，请提供需求以便获取完整规格书参考。
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