WMSIC Electronic Components

CJ 2N3904

Model2N3904
PackageTO-92
BrandCJ
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

20 specifications

Core information

Product name
CJ 2N3904
Type
CJ
Unit
Electronic Component
Minimum package
1000 袋

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic Component
Electronic Component
CJ
Electronic Component
2N3904
Electronic Component
1
Package
TO-92
Electronic Component
1 NPN
Electronic Component
Transistor(BJT)
Electronic Component
0.207g
Electronic Component
1
Electronic Component
BM0000284994
Operating Temperature
55℃~+150℃
Transistor Type
NPN
Frequency(f T)
300MHz
Power Dissipation(Pd)
625mW
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.

2N3904 产品概述

一、产品简介

2N3904是一款广泛应用的NPN型晶体管,采用TO-92封装,具备可靠的性能和良好的适应性。作为电子元器件中的重要组成部分,2N3904适用于多种电子电路中,常被用于开关和放大器应用,其高达40V的集电极-发射极电压(Vceo)和0.2A的集电极电流(Ic)规格,使其在多种电子装置中扮演着关键角色。

二、参数详解

  1. 封装类型:TO-92

    • TO-92是一种常见的塑料封装,因其小巧、便于手工焊接而受到广泛欢迎。其引脚布局简单,适合于各种PCB设计,极大地方便了用户的使用与安装。
  2. NPN结构:

    • 作为NPN型晶体管,2N3904具有良好的电流放大能力。其工作原理是通过施加在基极的控制电压来调节流过集电极和发射极之间的电流,为应用提供了便利。
  3. 重要电气特性:

    • Vceo (集电极-发射极开路电压):最大为40V,意味着该晶体管适合于不同电压的电路应用,能够在相对高的电压条件下稳定工作。
    • Ic (集电极电流):最大为0.2A,适合用于低功率的开关应用,通常在信号放大器、开关电路和其他小信号处理应用中表现出色。
    • HFE(直流电流增益):范围在200到300之间,说明此器件在放大过程中拥有优秀的增益性能,这使得它在接收和处理微弱信号时表现尤为突出。

三、应用领域

2N3904的广泛应用涵盖了多个领域:

  1. 开关电路:

    • 作为低功率开关,这款晶体管可以高效地控制电流的通断,常用于LED驱动、继电器驱动等应用场合。
  2. 信号放大:

    • 因其良好的电流增益特性,2N3904在音频信号处理和其他微弱信号放大应用中得到了广泛应用,例如家庭音响系统的前置放大器。
  3. 电路保护:

    • 当与其他元器件共同使用时,2N3904可被用作过载保护和电平转换,在推动其他更高功率器件时提供支持。
  4. 模拟电路:

    • 在模拟电路中,2N3904常用于构建各种线性放大电路和振荡器,因其线性响应较好,适合信号处理。

四、优点与局限性

优点:

  • 高电流增益:在相对较小的基极电流下能够实现较大的集电极电流输出,提升整个电路的灵敏度和响应速度。
  • 工作电压高:可在较高的电压下正常工作,增强了其在多样化应用中的适应性。
  • 广泛适用性:由于其价格低廉和性能稳定,2N3904成为许多电子设计中的首选元器件。

局限性:

  • 低功率:尽管适合低功率应用,但在高功耗电路中,可能无法满足要求,用户需在使用时考虑其技术规格。
  • 温度敏感性:晶体管的性能可能受到温度变化的影响,在特殊环境下使用时需谨慎考量。

五、结论

综合来看,2N3904作为一种优秀的NPN晶体管,以其宽广的应用范围和优良的性能在电子设计中占据了重要地位。无论是在开关电路,还是在信号放大和电路保护等应用中,它都展现出了良好的可靠性。对于希望设计出高效能电路的工程师而言,2N3904无疑是一个理想的选择。通过合理的电路设计和配置,2N3904能够帮助实现高效、稳定的电路功能。此外,随着电子行业的快速发展,该晶体管也将继续在未来的电路设计中发挥其重要作用。

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