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BORN 1SMA4737A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN 1SMA4737A
- Type
- BORN
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- 1SMA4737A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Zener Diode
- Electronic Component
- 0.11g
- Electronic Component
- 1
- (Zzk)
- 700Ω
- (Zzt)
- 4Ω
- Electronic Component
- BM0264583399
- Diode
- 1
- Current(Ir)
- 10uA
- 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.
1SMA4737A 稳压二极管产品概述
一、产品定位与核心价值
1SMA4737A是伯恩半导体（BORN）推出的SMA封装中小功率稳压二极管，核心功能是提供稳定的7.5V直流电压基准，兼具小型化、宽温适应性及低功耗特性，适配对空间紧凑、可靠性要求较高的电子电路设计，是消费电子、工业控制、车载系统等领域的常用稳压器件。
二、关键参数与性能特点
结合产品官方参数，核心性能可归纳为以下几点：
- 稳压精度与动态特性：标称稳压值7.5V，动态阻抗（Zzt）仅4Ω（典型测试条件：1mA反向电流下），负载电流变化时输出电压波动极小；测试阻抗（Zzk）700Ω，满足低电流场景下的稳压需求。
- 功耗与漏电流控制：最大耗散功率（Pd）1W，支持≤133mA的负载电流（7.5V下）；反向漏电流（Ir）仅10uA，静态功耗低，适合电池供电或低功耗电路。
- 宽温可靠性：工作结温范围覆盖-55℃~+150℃，可适应工业环境（如PLC、传感器）、车载场景（如仪表盘、音响）等极端温度工况。
- 封装适配性：采用SMA（DO-214AC）贴片封装，尺寸约2.7mm×1.7mm，无引脚设计兼容回流焊工艺，大幅节省PCB布局空间，适合自动化生产。
三、典型应用场景
1SMA4737A的性能匹配多类电子设备的稳压需求，核心应用场景包括：
- 消费电子电源管理：手机、平板、智能穿戴的辅助稳压电路，为MCU、传感器提供稳定7.5V基准，低漏电流特性延长电池续航。
- 工业控制模块：PLC输入输出模块、温度传感器信号调理电路，宽温范围确保-40℃~+85℃环境下稳压性能稳定。
- 车载电子系统：车载音响电源稳压、仪表盘背光驱动辅助电源，适应车载环境的温度波动（-40℃~+125℃）及振动工况。
- 小型DC-DC转换器：低功率DC-DC输出端的二次稳压，弥补转换器输出纹波，提升电压稳定性。
四、选型与使用注意事项
为确保产品可靠性，设计时需注意以下要点：
- 功率匹配：负载功率需≤1W（或电流≤[email protected]），若接近极限需增加PCB焊盘散热面积（如铜箔填充）。
- 电流范围：建议工作反向电流控制在1mA~20mA之间，此区间动态阻抗最低，稳压精度最优；避免电流过大导致结温过高。
- 极性与安装：SMA封装色环端为阴极（需反向接入电路），安装时需通过丝印或色环确认极性，反向接入会损坏器件。
- 温度系数考量：7.5V稳压管典型温度系数约0.01%/℃（每℃变化0.75mV），若需高精度稳压，可结合热敏电阻做温度补偿。
五、总结
1SMA4737A凭借小型化封装、宽温适应性、低漏电流及稳定的7.5V稳压性能，成为中小功率稳压场景的高性价比选型，广泛应用于多领域电路设计，是工程师设计紧凑电路时的常用器件。
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