WMSIC Electronic Components

Jingdao Microelectronics 1SMA4748A

Model1SMA4748A
PackageSMA
BrandElectronic
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
Electronic 1SMA4748A
Type
Jingdao Microelectronics
Minimum package
5000 个

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic
Electronic Component
1SMA4748A
Electronic Component
1
Package
SMA
Electronic Component
Zener Diode
Electronic Component
0.062g
Electronic Component
1
(Zzt)
23Ω
Electronic Component
BM0231086971
Diode
1
Current(Ir)
5uA@17V
Power Dissipation(Pd)
1W
Electronic Component
20.8V~23.3V
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(晶导微电子)是一款独立式稳压二极管,采用SMA封装,专为印制板上作为稳压基准或过压保护使用而设计。标称稳压值为22V,典型工作稳定、可靠,适用于中低功耗的基准与稳压场合。

二、主要电气参数

  • 稳压值(标称):22V
  • 稳压值范围:20.8V ~ 23.3V
  • 反向电流 Ir:5μA @ 17V
  • 阻抗 Zzt:23Ω(在规定测试电流下)
  • 耗散功率 Pd:1W(在指定环境与散热条件下)
  • 工作结温范围:-55℃ ~ +150℃
  • 封装:SMA(表面贴装)

三、特性与优势

  • 精确稳压:22V 标称配合窄范围公差,适合作为参考或过压基准源。
  • 低漏电流:在17V时反向电流仅5μA,适合低静态电流应用。
  • 良好瞬态响应:较低的阻抗(23Ω)有助于在负载或输入波动时维持稳定电压。
  • 抗环境能力强:宽工作结温范围适应工业级温度要求,SMA封装便于自动化贴装和良好散热。

四、应用场景

  • 电源轨稳压:用于保护或为次级电路提供稳定参考电压。
  • 过压保护:与串联限流电阻配合,抑制短时过压冲击。
  • 仪表与基准源:在对噪声和稳定性要求中等的应用中作为简易基准。
  • 工业与通信设备:适合工作在-55℃至+150℃的严苛环境。

五、设计与使用建议

  • 功率与散热:1W为器件最大耗散功率,实际使用时应考虑PCB铜箔散热和环境温升,必要时做热阻匹配或降额使用。
  • 串联限流:作为稳压器使用须配串联电阻以限制电流,选择时按最大功耗和所需稳压电流计算。
  • 静电与焊接:遵循常规ESD防护要求,SMA封装支持回流焊,但应按照厂家温度曲线控制峰值温度与时间以避免损伤。
  • 环境可靠性:长期在高温或高功率工况下工作需评估热应力对稳压值漂移的影响,并预留安全裕度。

以上信息基于器件典型参数与常见应用经验整理。如用于关键系统,建议结合晶导微电子正式数据手册与样品测试验证具体性能与可靠性。

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