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CJ BZX84C4V3
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ BZX84C4V3
- Type
- CJ
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- BZX84C4V3
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- Zener Diode
- Electronic Component
- 0.036g
- Electronic Component
- 1
- (Zzt)
- 90Ω
- Electronic Component
- BM0227649274
- Diode
- 1
- Current(Ir)
- 3uA@1V
- Power Dissipation(Pd)
- 300mW
- Electronic Component
- 4V~4.6V
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BZX84C4V3 Z17 — 产品概述
一、产品简介
BZX84C4V3 Z17 是 CJ（江苏长电/长晶）生产的一款独立式稳压二极管，标称稳压值 4.3V，实际稳压范围 4.0V ~ 4.6V。器件采用 SOT-23 小封装，适合低功耗、体积受限的表面贴装应用，用于基准电压、过压钳位和简单的稳压电路。
二、主要参数速览
- 稳压值（标称）：4.3V（范围 4.0V ~ 4.6V）
- 反向电流 Ir：3 μA @ 1V
- 耗散功率 Pd：300 mW
- 动态阻抗 Zzt：90 Ω
- 配置：独立式（单只稳压二极管）
- 封装：SOT-23
三、电气特性解析
标称 4.3V 表示在规定测试电流下的稳压电平，实际器件有一定公差（4.0~4.6V）。动态阻抗 90 Ω 表明在工作点附近电压随电流变化较明显，输出噪声与电压纹波抑制能力有限，不适合要求高精度、低噪声的参考源。反向漏电 3 μA（在 1V 条件下）表明在低电压偏置时漏流较小，但在高阻输入或高精度电路中仍需考虑。
四、热与功耗注意
额定耗散功率为 300 mW。理论上稳压电流 Iz_max ≈ Pd / Vz ≈ 0.3W / 4.3V ≈ 70 mA，但实际连续工作受封装散热能力和 PCB 布局限制，应进行热降额。工程上通常将持续电流控制在该理论值的 30%50%（推荐根据具体 PCB 散热条件将连续 Iz 限制在 2035 mA 范围），短时脉冲可更高，但仍需注意峰值能量。
五、典型应用与电路建议
- 作为简单的基准电压源或电平移位器，常与串联限流电阻配合使用（R = (Vin - Vz) / Iz）。
- 用于输入过压钳位或保护低压敏感器件的瞬态限制。
- 在设计时建议在二极管并联低 ESR 电容以改善瞬态响应与滤波，但并不会显著降低稳压噪声。
- 对于要求稳压精度较高的场合，应选用低阻抗、低温漂的参考源替代。
六、封装与选型建议
SOT-23 体积小，焊接方便，适合消费类、通信模块和便携设备。选型时请参考完整数据手册确认引脚排列、最大反向电压、温度系数及测试条件。若电路对泄漏、电压精度或热稳定性有较高要求，考虑使用功耗更大或精度更高的封装/型号。
七、小结
BZX84C4V3 Z17 是一款面向通用应用的 4.3V 级稳压二极管，适合体积受限且对精度要求不高的场合。设计时重点关注功耗热管理、动态阻抗对负载变化的影响，以及漏电对高阻输入电路的影响，合理选择限流电阻和 PCB 散热布局可获得稳定可靠的工作状态。若需更严格的电气与热性能参数，请参照厂商完整数据手册。
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