WMSIC Electronic Components

Jingdao Microelectronics 1SMA4735A

Model1SMA4735A
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 1SMA4735A
Type
Jingdao Microelectronics
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic
Electronic Component
1SMA4735A
Electronic Component
1
Package
SMA
Electronic Component
Zener Diode
Electronic Component
0.062g
Electronic Component
1
(Zzt)
2Ω
Electronic Component
BM0226518935
Diode
1
Current(Ir)
10uA@3V
Power Dissipation(Pd)
1W
Electronic Component
5.86V~6.51V
Electronic Component
Electronic Component
Electronic Component
5000

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

1SMA4735A 产品概述

一、产品简介

1SMA4735A 为晶导微电子出品的独立式稳压二极管(Zener),封装为SMA,标称稳压值为6.2V。该器件用于低功耗稳压、浪涌吸收与基准参考场合,结构简单、成本低、易于在PCB上布置与替换,适合消费电子、通信设备、电源保护及信号接口保护等应用。

二、主要电气参数

  • 稳压值(标称):6.2V
  • 稳压值(范围):5.86V ~ 6.51V
  • 反向漏电流 Ir:10 µA @ 3V
  • 动态阻抗 Zzt:2 Ω
  • 最大耗散功率 Pd:1 W(在规定散热条件下)
  • 封装:SMA(独立式封装,便于波峰/回流焊工艺)

三、性能要点解读

  • 稳压精度:标称6.2V,实际出厂值处于5.86V–6.51V范围内,适用于对电压精度要求一般的基准或保护电路。
  • 动态阻抗2 Ω:在稳压区内,对电流变化的电压响应较小,能提供较好的负载调节性能。举例:电流变化10 mA时,稳压电压约变化20 mV。
  • 低漏电流:3V时漏电仅10 µA,适合对静态电流有一定要求的电路。
  • 功耗1W:适合中等功率的瞬态或持续稳压应用,但需要注意热管理与寄生环境影响。

四、设计与使用建议

  • 系列限流电阻计算:R = (Vin - Vz) / Iz。其中 Iz 为工作稳流,需兼顾最低Iz以进入稳压区与最大耗散功率 Pd。
  • 功耗与热管理:器件最大Pd为1W,但长期工作建议取额定功耗的50%~70%以内以提高可靠性并降低结温。按 Pd 最大值推算的理论最大稳流 Iz_max ≈ 1W / 6.2V ≈ 161 mA,但不建议长期以此电流工作。
  • PCB 布局:在SMA封装周围增加铜箔散热面积(尤其为焊盘加宽)可显著改善热阻和持续功率能力;保持焊盘和走线不过度限制散热。
  • 启动/瞬态保护:用于浪涌吸收场合时,应配合限流元件或串联电阻以限制峰值功耗,防止器件因短时间过流而损坏。
  • 焊接与储存:遵循制造商的回流/波峰焊工艺规范,避免过高温度和过长热暴露;存储防潮,开卷后按潮湿敏感元件处理(若适用)。

五、典型应用

  • 低功耗稳压基准(低端参考源)
  • 输入电源过压保护与浪涌吸收
  • 信号线电平钳位与保护
  • 小功率电源模块中的并联稳压或温度补偿场合

六、选型与采购建议

选择1SMA4735A时,请确认实际工作电流范围、环境温度与PCB散热条件。对长期稳定性有较高要求的设计,应考虑器件的功耗余量或上级稳压方案。采购时注意与晶导微电子的规格书一一对照,必要时向厂方获取详细的热阻、曲线图和可靠性数据以完成最终验证。

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