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BORN 1SMA4759A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN 1SMA4759A
- Type
- BORN
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- 1SMA4759A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Zener Diode
- Electronic Component
- 0.115g
- Electronic Component
- 1
- (Zzk)
- 2kΩ
- (Zzt)
- 125Ω
- Electronic Component
- BM0264897297
- Diode
- 1
- Current(Ir)
- 5uA
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 55℃~+150℃
- 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.
1SMA4759A — 1W 62V SMA封装贴片稳压管 概述
一、产品简介
1SMA4759A 为 BORN（伯恩半导体）出品的 1W 功率稳压二极管，采用 SMA（DO-214AC）贴片封装，标称稳压值 62V。该器件为单个独立式稳压管，适合在有限散热条件下实现高电压基准或过压保护。工作结温范围宽（-55℃ 至 +150℃），可满足工业级环境要求。
二、关键电参数
- 标称稳压值（Vz）：62V（标准工作点）
- 反向电流（Ir）：5 μA（典型/最大量级，依据厂商测试条件）
- 功率耗散（Pd）：1W（器件在规定散热条件下的额定耗散）
- 动态阻抗（Zzt）：125 Ω（在测试电流或稳压工作点下的小信号阻抗）
- 拐点阻抗（Zzk）：2 kΩ（低电流区域或拐点附近的阻抗特性）
- 工作结温：-55℃ ~ +150℃
以上参数是选型时的核心依据，实际电路设计应参考厂商完整数据手册中给定的测试条件和曲线。
三、主要特点与优势
- SMA 表面贴装，适用于自动贴装与回流焊工艺，节省 PCB 面积。
- 1W 的功率级别在贴片稳压器中属于中等，可用于小功率稳压与浪涌吸收。
- 动态阻抗较低（Zzt=125 Ω）意味着在额定测试电流下具有相对稳定的稳压能力。
- 宽温区与工业级承受能力，适合恶劣环境使用。
四、典型应用场景
- 高压基准或稳压：小功率直流稳压、基准电压源。
- 过压保护与瞬态抑制：用于保护后级电路免受超过62V 的瞬态或误接电压。
- 通信与电源系统：如 48V/60V 供电系统的浪涌钳位，或电池管理中作为保护元件。
- 工业电子设备、测试仪器及其它要求高电压保护的小型模块。
五、封装与热管理建议
SMA（DO-214AC）封装便于 PCB 安装，但 1W 功率耗散受 PCB 散热影响较大。设计时建议：
- 在焊盘处扩大铜箔面积并加设热沉或散热通路（厚铜或多层过孔），以降低结-环境热阻。
- 对于连续高功耗工作，应进行功率与温升计算，必要时采用外部散热措施或选用更高功率等级器件。
- 推荐遵循 BORN 的回流焊工艺规范以保证焊接可靠性。
六、选型与注意事项
- 注意查看厂商完整数据表，确认 Ir、Vz 在具体测试电流和温度下的数值及允许公差。
- 若电路中存在长时间高功耗或频繁浪涌，应考虑功率余量或并联/更高功率封装。
- Zzk 值较高表明在低电流区拐点附近稳压特性变化大，在微小电流基准应用时需评估噪声与稳定性。
总结：1SMA4759A 是一款适合中高电压、低功耗场合的 SMA 封装贴片稳压管，凭借其工业级温度范围和贴片封装，适用于需要 62V 级别稳压或过压防护的多种电子应用。选型时应结合实际工作电流、散热条件与稳压精度要求，参考完整数据手册以获得最佳设计结果。
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