Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
UMW SMAJ33CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- UMW SMAJ33CA
- Type
- UMW
- Minimum package
- 1800 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- UMW
- Electronic Component
- SMAJ33CA
- Electronic Component
- 1
- Package
- DO-214AC(SMA)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.108g
- Electronic Component
- 1
- Electronic Component
- BM0231084827
- Voltage
- 53.3V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 36.7V
- Electronic Component
- Electronic Component
- Electronic Component
- 1800
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ33CA 产品概述
一、产品简介
SMAJ33CA 是友台半导体（UMW）推出的一款双向瞬态抑制二极管（TVS），封装为 DO-214AC（SMA）。器件用于对瞬态过电压（如雷击、电源浪涌、开关瞬变等）进行钳位保护，保护下游敏感元件免受过压冲击。其设计适合交流耦合或需要双向保护的线路场合，体积小、响应快、耐冲击能力强，便于表面贴装组装。
二、主要参数
- 极性：双向
- 反向截止电压 Vrwm：33 V
- 击穿电压 Vbr：36.7 V
- 钳位电压 Vc：53.3 V（在规定峰值脉冲电流条件下）
- 峰值脉冲电流 Ipp：7.5 A
- 峰值脉冲功率 Ppp：400 W（典型10/1000 μs脉冲参考）
- 反向电流 Ir：1 μA（在 Vrwm 条件下）
- 类型：TVS（瞬态电压抑制器）
- 封装：DO-214AC（SMA）
- 品牌：UMW（友台半导体）
三、典型特性与优势
- 快速响应：对瞬态过电压响应时间极短，可在纳秒级别夹断峰值脉冲。
- 良好钳位性能：钳位电压53.3 V，可在指定冲击能量下将过压限制在可接受范围，保护后续元件。
- 低静态泄漏：反向漏电仅约1 μA，适合对待机功耗敏感的系统。
- 封装可靠：SMA 封装兼顾热耗散与焊接可靠性，适合自动贴装工艺。
四、典型应用场景
- 直流/交流通信线保护、数据总线与接口（如RS‑485、以太网线路）的浪涌保护；
- 电源线路浪涌吸收、ADC/DAC 输入端保护；
- 工业自动化、仪器仪表及消费电子产品中对瞬态过压防护的场合。
五、使用建议与布板注意
- 选型时确认钳位电压低于被保护器件允许的最大耐压，但高于系统正常工作电压（Vrwm=33 V）。
- 布局上尽量将 TVS 靠近受保护端口，输入端到 TVS 的导线和走线应最短，减少寄生电感；地线或公共回流应宽短并使用足够的接地过孔以利散热。
- 对于高能量冲击场合，考虑并联或选择更高Ppp等级的器件以提高寿命与可靠性。
- 焊接时遵循制造商的回流曲线，避免过热导致封装或内芯损伤。
SMAJ33CA 适合需要双向保护且对响应速度、钳位能力有明确要求的电路，是一种经济且可靠的瞬态抑制解决方案。若需更详细的电气特性曲线、能量测试条件或封装尺寸图，请参考厂商规格书或联系供应商获取原始资料。
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