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MDD SMBJ18CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MDD SMBJ18CA
- Type
- MDD
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MDD
- Electronic Component
- SMBJ18CA
- Electronic Component
- 1
- Package
- SMB(DO-214AA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.224g
- Electronic Component
- 1
- Electronic Component
- BM0227599281
- 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.
SMBJ18CA（MDD）TVS二极管产品概述
一、产品简介
SMBJ18CA 是 MDD 出品的一款双向瞬态电压抑制（TVS）二极管，采用 SMB（DO-214AA）封装，专为抑制浪涌、雷击和瞬态过压而设计。其稳压钳位电压为 29.2V，常用于 12V 级电源与信号线的过压保护场景，工作温度范围宽（-65℃ 至 +150℃），适合工业与汽车级环境。
二、主要电气参数
- 反向工作电压 Vrwm：18V
- 击穿电压 Vbr：22.1V
- 钳位电压 Vclamp：29.2V
- 峰值脉冲功率 Ppp：600W（10/1000µs 波形）
- 峰值脉冲电流 Ipp：20.6A
- 反向漏电流 Ir：1µA（在 Vrwm 条件下）
- 极性：双向（Bi-directional）
- 工作温度：-65℃ ～ +150℃
- 封装：SMB (DO-214AA)
根据给定数据，可估算在 Ipp 条件下的动态电阻大约为 (29.2V - 22.1V) / 20.6A ≈ 0.345Ω，表明在大电流冲击时有较好的钳位能力。
三、性能特点
- 高能量吸收能力：600W（10/1000µs）适合应对雷电感应与线路冲击。
- 低漏电流：Vrwm 下 Ir 仅 1µA，有利于不影响正常电路工作。
- 宽温度稳定性：-65℃ 到 +150℃ 的工作范围，适合严苛环境。
- 双向保护：对正负极性瞬态均能有效吸收，适用于交流或双向信号线。
- 标准 SMB 封装：便于自动化贴装与标准化 PCB 布局。
四、典型应用场景
- 汽车 12V/24V 电源与数据线浪涌保护（车载电子、仪表、车灯控制等）。
- 工业电源、PLC、变频器输入端的浪涌与雷电防护。
- 通信设备、基站外围信号线的瞬态抑制。
- 电源适配器、充电设备及其它需抗高能瞬态的电子系统。
五、PCB 布局及热管理建议
- 贴片位置尽量靠近被保护端口或连接器，减少走线长度与感性耦合。
- 加宽焊盘与走线，便于热量分散并承受大电流冲击。
- 对于频繁冲击或高能环境，建议配合保险丝或限流电阻使用，以分担能量并保护 TVS。
- 留出足够的铜箔面积做散热，避免多次冲击导致器件升温或失效。
六、使用注意事项
- 选型时确认 Vrwm 与系统工作电压匹配（通常用于 12V 级系统时留出余量）。
- 峰值功率基于单次指定波形，重复脉冲或更苛刻波形下需按能量累计进行降额设计。
- 安装时遵循封装极性与焊接温度规范，避免热冲击超出器件承受范围。
SMBJ18CA 提供稳健的瞬态抑制性能与宽工作温度能力，是应对工业、通信与车载环境中高能瞬态的可靠选择。若需电气曲线图、封装尺寸或更多测试条件（如测试电流、瞬态曲线），可进一步提供数据手册以便精确设计。
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