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BORN 1SMA4744A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN 1SMA4744A
- Type
- BORN
- Minimum package
- 5000 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- 1SMA4744A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Zener Diode
- Electronic Component
- 0.102g
- Electronic Component
- 1
- (Zzk)
- 700Ω
- (Zzt)
- 14Ω
- Electronic Component
- BM0264682186
- Diode
- 1
- Current(Ir)
- [email protected]
- 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.
1SMA4744A 产品概述
一、产品简介
1SMA4744A 为 BORN（伯恩半导体）推出的 SMA（DO-214AC）封装贴片稳压管，标称稳压值 15V，单只独立封装，额定耗散功率 1W。器件适合用于中低功率的基准稳压、过压保护及浪涌吸收场合，兼顾贴片工艺与热管理需求。
二、主要参数
- 稳压值（标称）：15V
- 反向电流 Ir：5 µA @ 11.4V
- 耗散功率 Pd：1W（环境合适、散热条件下连续工作）
- 动态阻抗 Zzt：14 Ω
- 膝部阻抗 Zzk：700 Ω
- 工作结温范围：-55℃ ~ +150℃
- 封装：SMA (DO-214AC)
三、性能解析
Zener 15V 在工作区表现为较稳定的基准电压；Zzt=14 Ω 表示在指定测试点下的动态阻抗偏小，有利于负载变化时维持电压稳定；Zzk=700 Ω 反映出在击穿膝部的非线性特性，对输入电流突变时的响应影响较大。Ir=5 µA 表明低压差下漏电小，适合对静态功耗敏感的电路。
根据 Pd=1W 与 Vz=15V，可估算最大稳态分流电流 Iz(max) ≈ 1W / 15V ≈ 66.7 mA，实际设计应留有裕量，推荐工作电流远低于该值以降低发热和提升可靠性。
四、典型应用
- 简单稳压源（并联稳压／并联基准）
- 输入过压或反向保护电路
- 浪涌抑制与钳位电路
- 通信、电源管理模块中的参考稳压元件
使用示例：在做并联稳压时，给定输入 Vin 与负载，需通过串联限流电阻 R = (Vin - 15V) / Iz 计算合适阻值，并保证 Iz 与 Iz(max) 的安全距离。
五、安装与散热建议
SMA 封装为贴片形式，推荐依据厂商封装图采用相应的 PCB 焊盘布局。1W 功耗级别下需考虑 PCB 铜箔面积与热散布，多采用增加焊盘面积、下层过孔或加大铜厚以降低结-环境热阻。回流焊工艺请遵循无铅温度曲线，避免超温与长时间高温应力。
六、质量与采购信息
器件型号：1SMA4744A，品牌：BORN（伯恩半导体），封装：SMA (DO-214AC)。采购时注意查验批次、管脚标记和静电防护要求，并按应用场景对筛选样品进行温升与长期老化测试以确认稳定性。
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