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ST SM4T12CAY
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST(STMicroelectronics) SM4T12CAY
- Type
- ST
- Minimum package
- 5000
Technical parameters
- Electronic Component
- ST(STMicroelectronics)
- Electronic Component
- SM4T12CAY
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.13g
- Electronic Component
- 1
- Electronic Component
- BM0230029086
- Voltage
- 21.7V
- Current(Ir)
- 200nA
- Voltage(VBR)
- 11.7V
- Electronic Component
- 5000
- Power(Ppp)
- 2.3kW@8/20us
- Current(Ipp)
- 174A@8/20us
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SM4T12CAY 产品概述
一、概述
SM4T12CAY 是意法半导体（ST）推出的一款双向瞬态抑制二极管（TVS），用于对电源和信号线的静电（ESD）及浪涌脉冲保护。器件为SMA（DO-214AC）表面贴装封装，适合紧凑电路板布局与自动化贴装。
二、主要参数
- 极性：双向（无方向限制，正负峰值均可钳位）
- 反向截止电压 Vrwm：10 V（适用于12 V工作电源保护）
- 击穿电压（Vbr）：11.7 V
- 钳位电压 Vc：21.7 V（指定测试条件下）
- 峰值脉冲电流 Ipp：174 A @ 8/20 μs
- 峰值脉冲功率 Ppp：2.3 kW @ 8/20 μs
- 反向漏电流 Ir：200 nA（在Vrwm条件下，低漏电利于待机功耗）
- 类型：TVS / ESD，封装：SMA（DO-214AC）
三、功能特点与优势
- 双向钳位，可同时抑制正向与反向瞬态，适合交流或双向信号线保护。
- 高脉冲承受能力（Ipp、Ppp指标）能够吸收工业或瞬态浪涌能量（8/20 μs波形）。
- 低漏电流减小对低功耗系统的影响，适用于敏感电子模块。
- SMA 封装利于自动贴片与更换，热特性和机械强度适中。
四、典型应用场景
- 12 V 电源轨和车载电子辅助保护（需参考车规认证情况）。
- 工业设备、通信设备输入端的浪涌与雷击脉冲保护。
- 串行信号线或接口（须注重器件电容特性，对高速信号影响需评估）。
- 消费类电子电源模块和外围保护。
五、使用与布局建议
- 将TVS器件靠近被保护器件或输入端点放置，走线尽可能短且粗，减小回路电感。
- 注意焊接工艺与热散热路径，SMA封装通过焊盘向PCB散热。
- 在高频或高速信号线路上使用时，请查询器件电容及频率响应，避免影响信号完整性。
- 在选择前核对工作电压和最大钳位电压，确保钳位电压不会损害后端电路元件。
六、选型与替代建议
在选用SM4T12CAY时，应核实实际浪涌能量、重复浪涌次数和工作环境温度，必要时参考完整数据手册的能量耗散曲线与热阻参数。若需更高功率或更低钳位电压，可在ST或其他厂商产品线中寻找同类或更高等级的TVS器件。
如需原厂数据手册、封装尺寸图或更详细的电气特性曲线，可提供后为您检索完整资料。
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