WMSIC Electronic Components

MEIHUA MHDA4021SRBW

ModelMHDA4021SRBW
PackageThrough-hole
BrandMEIHUA
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
MEIHUA MHDA4021SRBW
Type
MEIHUA
Minimum package
126 托盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
MEIHUA
Electronic Component
MHDA4021SRBW
Electronic Component
1
Electronic Component
16mm
Package
Through-hole
Electronic Component
LED
Electronic Component
2.65g
Electronic Component
20.1mm
Electronic Component
7mm
LED
Electronic Component
Electronic Component
1
LED
14mcd
LED
Electronic Component
Electronic Component
BM0265067078
Operating Temperature
35℃~+85℃

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

MHDA4021SRBW 2位共阳极红色数码管产品概述

一、产品定位与核心价值

MHDA4021SRBW是美华(MEIHUA)推出的插件式2位七段数码管,针对低功耗、小尺寸、近距离显示场景设计,核心优势在于红色发光清晰易读、共阳极极性适配主流驱动电路、功耗低且可靠性强。产品适用于工业控制、小型仪表、家电面板等对显示精度和功耗有要求的终端设备,是替代传统显示元件的高性价比选择。

二、核心参数详解

1. 显示与发光规格

  • 显示位数:2位七段数码管,支持0-9数字及A-F等常用字母显示;
  • 字符尺寸:0.402英寸(约10.2mm),字符高度适中,近距离(0.5-2米)可视清晰;
  • 发光颜色:红色(典型波长625nm),亮度≥50mcd,对比度高,强光下仍可识别;
  • 视角:≥120°,多方向观看无明显亮度衰减。

2. 电气与功耗特性

  • 极性:共阳极(公共端为正极,各段为负极);
  • 单段电气参数:典型工作电压Vf=2.0V,连续工作电流If=10mA,最大脉冲电流Ifp=30mA;
  • 整机功耗:单段最大耗散功率Pd=50mW,整机(14段)总功耗≤700mW,符合低功耗设计要求;
  • 工作温度:-20℃~70℃,适应工业及普通民用环境;
  • 存储温度:-40℃~85℃,便于长期存储。

3. 封装与尺寸

  • 封装类型:插件DIP封装,引脚数10脚(含公共端);
  • 外形尺寸:约15.0mm(长)×10.0mm(宽)×8.0mm(高),紧凑设计节省PCB空间;
  • 引脚间距:符合行业标准(2.54mm),兼容常规PCB焊接工艺。

三、结构设计与可靠性

1. 封装工艺

采用环氧树脂全密封封装,具备防尘、防潮、抗腐蚀特性,可有效抵御工业环境中的粉尘、湿度影响,延长产品使用寿命;封装硬度高,抗冲击振动,适合车载、户外等振动场景。

2. 发光段均匀性

每段LED采用均匀排布设计,字符显示无暗区、无亮斑,亮度一致性好;段与段之间绝缘性佳,无串光现象,提升显示清晰度。

3. 引脚可靠性

引脚采用镀锡工艺,焊接牢固性强,耐氧化性能好;引脚布局符合共阳极数码管通用标准,与74HC595、CD4511等驱动芯片直接兼容,无需额外转换电路。

四、驱动适配与使用优势

1. 驱动方式灵活

支持直接驱动(如三极管放大驱动)和芯片驱动(如移位寄存器、BCD码驱动),共阳极设计适配大多数MCU的IO口(只需将段引脚拉低即可点亮),降低电路设计复杂度。

2. 低功耗适配

单段50mW的耗散功率,适合电池供电设备(如便携式仪表、电子玩具),可延长设备续航时间;同时满足工业设备的低功耗要求,减少散热设计成本。

3. 长寿命设计

LED核心采用美华自主研发的高亮芯片,使用寿命≥10万小时,远高于传统白炽灯显示元件,降低终端设备的维护频率。

五、典型应用场景

  1. 工业控制仪表:温度控制器、压力变送器、液位计的当前值显示;
  2. 家电控制面板:热水器、空调、洗衣机的温度/模式/时间显示;
  3. 电子衡器:小型电子秤、计价秤的重量/单价显示;
  4. 安防设备:门禁控制器、监控主机的状态/时间显示;
  5. 教育与玩具:简易电子计时器、计数器、科学实验装置的数值显示。

六、使用注意事项

  1. 焊接规范:焊接温度≤260℃,焊接时间≤3秒/引脚,避免高温损坏LED芯片;
  2. 静电防护:操作时需佩戴防静电手环,工作台接地,防止静电击穿LED;
  3. 电流限制:单段连续电流不得超过10mA,脉冲电流不得超过30mA,需串联限流电阻(R=(Vcc-Vf)/If);
  4. 环境要求:避免在腐蚀性气体、强磁场环境中使用,存储时远离潮湿区域。

MHDA4021SRBW凭借稳定的性能、灵活的驱动适配和紧凑的尺寸,成为中小显示场景的优选元件,可满足不同行业终端设备的显示需求。

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