WMSIC Electronic Components

LRC LMSZ5254BT1G

ModelLMSZ5254BT1G
PackageSOD-123
BrandLRC
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 Date code within 2 years

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
LRC LMSZ5254BT1G
Type
LRC
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
LRC
Electronic Component
LMSZ5254BT1G
Electronic Component
1
Package
SOD-123
Electronic Component
Zener Diode
Electronic Component
0.035g
Electronic Component
1
(Zzk)
600Ω
(Zzt)
41Ω
Electronic Component
BM0230654048
Diode
1
Current(Ir)
100nA@21V
Power Dissipation(Pd)
500mW
Electronic Component
25.65V~28.35V
Electronic Component
55℃~+150℃

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

LMSZ5254BT1G 产品概述

一、概述

LMSZ5254BT1G 为乐山无线电(LRC)出品的独立式稳压二极管,标称稳压值 27V,稳压范围 25.65V~28.35V,最大耗散功率 500mW。器件采用 SOD-123 表贴封装,适用于空间受限的电源基准与过压保护场合。工作结温范围宽 (-55℃ ~ +150℃),可在较严苛环境下长期工作。

二、主要参数

  • 稳压值(标称):27V
  • 稳压值(范围):25.65V~28.35V
  • 反向漏电流 Ir:100nA @21V
  • 最大耗散功率 Pd:500mW
  • 动态阻抗 Zzt:41Ω
  • 转折阻抗 Zzk:600Ω
  • 工作结温:-55℃~+150℃
  • 封装:SOD-123(表贴)

三、电气特性说明

稳压二极管在反向工作区通过分流电流维持近似恒定电压。Zzt 表征在规定测试电流下的交流动态阻抗,值越小稳压精度越高;Zzk 反映击穿转折区的阻抗特性,较高的 Zzk 意味着在低电流区电压可能变化较大。Ir 指在低电压时的反向电流,影响小电流应用下的漏电与偏移。

四、典型应用

  • 小功率基准源与参考电压模块(需配合限流电阻)
  • 器件或总线的过压钳位保护
  • 信号线和功率线的浪涌抑制(限于弱浪涌和低能量场合)
  • 工业、通讯设备中的辅助稳压与保护电路

五、热管理与封装注意

500mW 为器件最大耗散功率,实际使用需考虑环境温度与 PCB 散热条件,建议在高温或连续大电流情形下进行降额使用。SOD-123 为小型表贴封装,热阻相对较高,应通过扩大焊盘、连接散热地或铜箔来改善散热。

六、PCB 布局与焊接建议

  • 阴极侧通常以印刷标识条表示,布局时预留合适走线和铜面积以利散热。
  • 建议与限流电阻靠近布局以减小寄生电感与电阻带来的误差。
  • 采用标准回流焊工艺,遵循封装厂商的焊接温度曲线以避免过热损伤。

七、可靠性与选型提醒

选择时注意稳压电流范围与实际电路工作点匹配,避免长期在最高 Pd 下工作;在低电流区要考虑 Zzk 带来的电压漂移;对漏电和温漂敏感的应用,需在电路中增加滤波或温度补偿。若需更高功率或更低动态阻抗,可考虑封装更大或功率更高的型号。

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