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CJ BZX84C30
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ BZX84C30
- Type
- CJ
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- BZX84C30
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- Zener Diode
- Electronic Component
- 0.036g
- Electronic Component
- 1
- (Zzk)
- 300Ω
- (Zzt)
- 80Ω
- Electronic Component
- BM0227649267
- Diode
- 1
- Current(Ir)
- 100nA@21V
- Power Dissipation(Pd)
- 300mW
- Electronic Component
- 28V~32V
- 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.
BZX84C30 稳压二极管（CJ 长晶）产品概述
一、产品简介
BZX84C30 为独立式稳压（二极管）器件，标称稳压值 30V，工作范围 28V~32V，采用 SOT-23 小封装，由 CJ（江苏长电/长晶）生产。该器件适用于低功耗稳压、基准钳位与过压保护等场景，封装体积小，便于表贴安装。
二、主要参数（基于提供数据）
- 标称稳压：30V（范围 28V~32V）
- 反向电流 Ir：100 nA @ 21 V
- 最大耗散功率 Pd：300 mW（注意需在环境温度与导热条件下做热耗散计算）
- 动态阻抗 Zzt：80 Ω（典型，测试点附近的动态阻抗）
- 膝部阻抗 Zzk：300 Ω（低电流区的阻抗，反映“膝部”特性）
- 封装：SOT-23
注：具体测试电流 Iz、温度系数、引脚排列与封装标识请以厂家完整数据表为准。
三、动态阻抗与性能意义
动态阻抗 Zzt（较低）表明在规定工作电流附近稳压性能好，负载电流变化时电压波动较小；较高的膝部阻抗 Zzk 表明在低电流区域稳压起伏较大，启稳电流较明显。反向漏电流在 21V 时仅 100 nA，适合对漏电敏感的应用，但随温度上升会明显增加。
四、典型应用场景
- 低功耗参考/基准钳位（30V 级别）
- 电源轨过压保护与钳位电路
- 器件偏置与电平移位（需配合限流电阻）
- 测试与测量设备中的高压基准源（功耗受限场合）
五、常用设计与计算要点
作为并联（分流）稳压器使用时，须用串联限流电阻 R 来分配电压和电流：R = (Vin - Vz) / (Iz + Iload)。Iz 应取厂家规定的测试或推荐稳流值以保证稳压精度；若数据表未给出，可采用经验值并做实验验证。注意在计算中务必保证最大功耗 Pd 不被超限，否则需要降额或改用更高功耗器件。
六、热管理与封装注意
SOT-23 封装受限于散热，300 mW 为器件在特定条件下的耗散极限。实际应用应考虑环境温度、PCB 铜箔面积和热阻，必要时增大散热区或选用更高功耗封装。焊接与回流请遵循厂家回流曲线并注意 ESD 防护。
七、选型与可靠性建议
在选型时除了稳压电压和功耗外，还应关注稳压精度、公差、温度系数、测试电流 Iz、极间电容与封装引脚定义。对关键或高可靠性应用，建议索取并参考 CJ 官方完整数据手册与器件样品做实测验证。
八、小结
BZX84C30（CJ）是一款适用于 30V 级别低功耗稳压与钳位的 SOT-23 二极管，具有较低的工作区动态阻抗和小漏电流，适合体积受限且对功耗敏感的应用。设计使用时重点关注工作电流、功耗分配与热管理，必要时参考并严格遵守厂家数据表以保证性能与可靠性。
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