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DOWO SMAJ45CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMAJ45CA
- Type
- DOWO
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMAJ45CA
- Electronic Component
- 1
- Package
- DO-214AC
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.12g
- Electronic Component
- 1
- Electronic Component
- BM0264215328
- Operating Temperature
- 55℃~+150℃
- Voltage
- 72.7V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 50V
- 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.
SMAJ45CA 产品概述
一、主要特性
SMAJ45CA 是 DOWO（东沃）推出的一款双向瞬态电压抑制二极管（TVS），采用玻璃钝化芯片工艺，封装为常见的 DO-214AC（SMA）。器件具有极快的响应时间、出色的钳位能力和低泄漏特性，符合 RoHS 环保标准，适用于对瞬态浪涌保护要求较高的电路。
二、关键电气参数
- 反向工作电压（Vrwm）：45 V（双向说明额定工作电压为 ±45V）
- 击穿电压（VBR）：50 V（典型）
- 钳位电压（Vc）：72.7 V（在指定脉冲条件下）
- 峰值脉冲电流（Ipp）：5.5 A（对应 10/1000 μs 波形）
- 峰值脉冲功率（Ppp）：400 W（波形 10/1000 μs，重复率/占空比 0.01%）
- 反向泄漏电流（Ir）：1 μA（在 Vrwm 条件下）
- 工作温度范围：-55 ℃ ~ +150 ℃
三、封装与可靠性
DO-214AC（SMA）封装便于自动贴片与焊接，适合中小功率保护场合。玻璃钝化芯片提高了结面稳定性和长期可靠性，在高温、振动和电应力环境下表现更为稳定。器件的低泄漏和高温工作能力，使其可用于苛刻环境下的长期防护。
四、适用场景
- 直流/交流电源轨保护（如工业控制电源、24V/36V 系统）
- 信号线和数据总线的浪涌保护（双向结构适合差分与交流应用）
- 电源模块、逆变器及配电系统的输入/输出防护
- 通信设备、测试仪器、楼宇自控等需防雷击或开关瞬变的场合
注：Vrwm=45V 在使用于 48V 系统时需谨慎评估余量与实际工况。
五、设计与使用建议
- 尽量将 TVS 靠近被保护器件布置，减少回路电感以降低钳位电压提升。
- 在可能出现高能量反复脉冲的场合，评估是否需要并联更高能量级别的保护或采用限流元件（如熔断器、热敏电阻）。
- 对于双向器件，正负方向的浪涌能力对称，适合交流或双向干扰场合；若只需单方向保护，可选择对应的单向型号。
- 注意焊接工艺，避免过长的再流时间或超温造成器件热应力。
六、小结
SMAJ45CA 以其 400W（10/1000 μs）峰值脉冲功率、72.7V 钳位能力与玻璃钝化的高可靠性，适合中等能量瞬态抑制需求的工业和民用电源及信号线路保护。合理的电路布局与选型配合能有效提升系统的抗浪涌能力与长期可靠性。若需用于高能量或连续冲击场合，建议与系统级防护策略配合评估。
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