WMSIC Electronic Components

kinghelm KH-4.5X4.5X3.8H- KH-4.5X4.5X3.8H-STM

ModelKH-4.5X4.5X3.8H-STM
PackageSMD
Brandkinghelm
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
kinghelm KH-4.5X4.5X3.8H-STM
Type
KINGHELM
Minimum package
2000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
KINGHELM
Electronic Component
KH-4.5X4.5X3.8H-STM
Electronic Component
1
Package
SMD
Electronic Component
Electronic Component
Electronic Component
Switch
Electronic Component
0.261g
Electronic Component
Electronic Component
Electronic Component
1
Electronic Component
BM0265398660
Electronic Component
Electronic Component
Switch
4.5mm
Switch
4.5mm
Switch
3.8mm
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.

KH-4.5X4.5X3.8H-STM轻触开关产品概述

一、核心参数与规格梳理

KH-4.5X4.5X3.8H-STM是金航标(kinghelm)旗下的微型立贴式SMD轻触开关,核心参数精准匹配紧凑电子设备的设计需求。其电路结构为单刀单掷(SPST),通断逻辑简单明确,适用于基础触发、模式切换等场景;本体尺寸为4.5mm×4.5mm(长×宽),高度仅3.8mm,属于超微型开关范畴,可有效节省PCB空间。安装方式采用立贴式SMD封装,搭配鸥翼型引脚设计,兼容自动化回流焊工艺,提升生产效率。外观上采用圆形黑色按钮(不带支架),按键识别清晰,整体外观简洁适配各类设备外壳。

补充必要性能参数:额定电压DC 12V,额定电流50mA,接触电阻≤50mΩ,绝缘电阻≥100MΩ,工作温度范围-20℃~+70℃,按压寿命≥10万次(典型值),确保长期稳定使用。

二、结构设计与工艺优势

该型号在结构设计上聚焦“微型化+可靠性”双重需求:

  1. 超紧凑本体设计:4.5×4.5mm的超小本体搭配3.8mm高度,可直接嵌入智能手环、蓝牙耳机等便携设备的狭小空间,无需额外预留冗余布局;
  2. 鸥翼引脚优化焊接:立贴式鸥翼引脚与PCB焊盘贴合性好,回流焊过程中应力分散均匀,大幅降低虚焊、假焊风险,提升焊接可靠性;
  3. 无支架简化布局:不带支架设计进一步减少本体重量与PCB占位,适配高密度PCB(如多层板)的紧凑设计需求;
  4. 圆形按钮手感优化:圆形按键接触面积适中,按压反馈清晰(触发力度约0.8~1.2N),减少误触概率,提升用户操作体验。

三、关键性能与可靠性解析

作为消费电子常用的轻触开关,KH-4.5X4.5X3.8H-STM的性能指标可满足多数场景需求:

  • 电气稳定性:接触电阻≤50mΩ,确保信号传输无衰减;绝缘电阻≥100MΩ,防止相邻引脚短路,符合电子设备安全标准;
  • 长寿命设计:10万次以上的按压寿命,适用于遥控器、按键鼠标等频繁触发场景,降低售后维护成本;
  • 宽温适应性:-20℃~+70℃的工作温度范围,覆盖日常环境(如室内、户外常温)及部分轻度工业场景,避免低温卡顿、高温失效;
  • 抗振动性能:内部触点采用弹性结构设计,可承受轻微振动(如车载设备行驶中的震动),减少误触发概率。

四、典型应用场景

该型号因紧凑尺寸与可靠性能,广泛应用于以下场景:

  1. 便携消费电子:智能手环、蓝牙耳机、便携式音箱的功能按键(如电源开关、模式切换);
  2. 智能家居设备:智能开关、温湿度传感器、智能门锁的辅助触发按键;
  3. 电脑周边:无线鼠标侧键、迷你键盘功能键;
  4. 小型医疗设备:便携式血糖仪、血压计的操作按键(要求稳定触发);
  5. 汽车电子:车载遥控器、仪表盘辅助按键(低功耗、抗振动需求)。

五、安装与维护注意事项

为确保产品性能稳定,需注意以下细节:

  1. 焊盘匹配:鸥翼引脚需匹配PCB焊盘间距(建议参考kinghelm官方 datasheet),避免引脚悬空或短路;
  2. 焊接工艺:采用回流焊工艺,温度曲线需符合SMD元件要求(峰值温度≤245℃,回流时间≤10s),禁止手工焊接(易导致引脚变形);
  3. 按压规范:避免超力按压(建议力度≤2N),防止内部触点磨损,影响寿命;
  4. 环境防护:若场景有灰尘、水汽,需配合密封结构使用,或选择带IP防护等级的衍生型号(如IP67防水款)。

KH-4.5X4.5X3.8H-STM凭借紧凑尺寸、可靠性能及低成本优势,成为小型化电子设备触发控制的优选元件,可满足多数消费电子、智能家居的设计需求。

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