WMSIC Electronic Components

Jingdao Microelectronics 1SMA4754A

Model1SMA4754A
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 Option 131405

Available for RFQ

Technical data

Product details

13 specifications

Core information

Product name
Electronic 1SMA4754A
Type
Jingdao Microelectronics
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic
Electronic Component
1SMA4754A
Electronic Component
1
Package
SMA
Electronic Component
0.12g
Electronic Component
1
Electronic Component
BM0265794255
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.

1SMA4754A稳压二极管产品概述

一、核心身份与基本定位

1SMA4754A是晶导微电子推出的独立式硅稳压二极管,采用SMA(DO-214AC)表面贴装封装,属于中高压稳压器件范畴。该器件专为小功率直流稳压、电压基准提供或过压保护场景设计,凭借宽温度范围、低漏电流等特性,适配工业控制、通信设备、仪器仪表等多领域应用,是替代部分进口同类器件的高性价比选择。

二、关键参数精准梳理

1SMA4754A的核心参数明确,可直接支撑电路设计与选型:

  • 稳压值:标称39V,实际工作范围37.2V~41.5V(覆盖±5%精度区间),满足常规电路对稳压输出的基础需求;
  • 反向漏电流:Ir=5uA(典型反向电压下),漏电流极低,可减少稳压电路静态功耗,提升系统效率;
  • 耗散功率:Pd=1W,最大允许功耗1W,结合稳压值计算,最大稳压电流约25.6mA(Izm≈Pd/Vz),适配低功率负载;
  • 动态阻抗:Zzt=60Ω,反映稳压值随电流变化的斜率,属于常规水平,可满足多数对稳压精度要求不苛刻的场景;
  • 工作结温:-55℃~+150℃,覆盖极端高低温环境,适配户外工业设备、汽车发动机舱等严苛工况。

三、封装特性与可靠性设计

该器件采用SMA(DO-214AC)表面贴装封装,具备以下实用优势:

  1. 体积紧凑:尺寸仅约2.4mm×1.6mm×1.0mm,适合高密度PCB布局,可降低电路整体体积;
  2. 焊接可靠:符合表面贴装工艺要求,支持回流焊、波峰焊,适配自动化批量生产;
  3. 环境适应性:宽结温范围+低漏电流设计,确保在-55℃低温(如北方户外设备)、150℃高温(如工业烤箱附近电路)下仍能稳定工作,长期可靠性高;
  4. 独立式配置:无内部并联/串联结构,参数一致性易管控,批量应用时无需额外筛选。

四、典型应用场景

1SMA4754A的参数特性适配以下具体场景:

  1. 工业电源模块:作为电压基准,为PLC、变频器的模拟量输入输出电路提供稳定39V参考,确保信号精度;
  2. 通信设备辅助稳压:小型无线基站、路由器的射频模块供电稳压,保障信号传输稳定性;
  3. 仪器仪表校准:便携式万用表、示波器的电压校准环节,提供精准39V基准;
  4. 电动车BMS辅助电路:电池管理系统中部分传感器的稳压供电,适配车载高低温环境;
  5. 低功率过压保护:LED驱动电源、小型直流电源的过压保护,当电压超过41.5V时击穿导通,保护后级电路免受损坏。

五、品牌与选型优势

晶导微电子作为国内功率半导体领域的主流厂商,1SMA4754A具有以下选型优势:

  1. 质量稳定:产品通过RoHS认证,符合环保要求,封装工艺成熟,参数一致性经批量验证;
  2. 成本可控:相比进口同类器件,性价比更高,适合中小批量到大规模生产的成本管控;
  3. 交期保障:国内产能充足,可快速响应客户订单需求,减少供应链风险;
  4. 技术支持:提供完善的datasheet与应用指导,帮助客户快速完成电路设计与调试。

该器件凭借明确的参数、紧凑的封装与可靠的性能,成为中高压小功率稳压场景的实用选型。

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