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BORN 1SMA4748A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN 1SMA4748A
- Type
- BORN
- Minimum package
- 5000 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- 1SMA4748A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Zener Diode
- Electronic Component
- 0.11g
- Electronic Component
- 1
- (Zzk)
- 750Ω
- (Zzt)
- 25Ω
- Electronic Component
- BM0231019396
- 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.
1SMA4748A 产品概述
一、产品简介
1SMA4748A 是 BORN（伯恩半导体）推出的一款 22V 稳压二极管，采用 SMA（DO-214AC）表面贴装封装。器件设计用于提供稳压参考与过压保护，工作结温范围宽，适应工业级环境。
二、电气参数
- 标称稳压值：22V
- 反向电流 (Ir)：5 μA（在指定反向电压下）
- 阻抗 Zzk：750 Ω
- 阻抗 Zzt：25 Ω
- 最大耗散功率 Pd：1 W
- 工作结温范围：-55 ℃ ～ +150 ℃
三、主要特性
- 标称稳压准确、噪声低，适合作为电压基准或小功率稳压器件。
- 低反向漏流（5 μA），在高阻抗电路中能够保持良好稳定性。
- 宽温度范围保证了在极端环境下的可靠性。
- SMA 封装便于自动贴装和波峰/回流焊接。
四、典型应用
- 电源电路的基准稳压与电压钳位。
- 模拟信号链的参考源与保护电路。
- 测试与测量仪器、汽车电子、工业控制等需稳压保护的场景。
五、封装与热管理
SMA（DO-214AC）为小型表面贴装封装，散热依赖于 PCB 铜箔面积与热通道设计。器件额定耗散功率为 1W，在实际设计中应考虑热降额，采用足够的散热铜箔或热过孔以保证结温在安全范围内。
六、设计与使用注意事项
- 采用时应根据工作电流与实际环境温度进行功率降额计算，防止结温超限。
- 布局时将器件与热源隔离，增大焊盘铜面并使用散热过孔。
- 注意极性标识（SMA 常见的端带为阴极），并避免在浪涌电压下长期超额工作。
七、结论
1SMA4748A 是一款针对中低功率稳压与保护场合的 22V Zener 器件，具有低漏流、宽温区和便于表贴的封装特性。合理的热设计与降额使用可确保其在工业级应用中的长期可靠性。若需更详细的测试条件与曲线，请参考厂商完整数据手册。
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