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MCC BZX84C3V9HE3-TP BZX84C3V9HE3
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MCC BZX84C3V9HE3-TP
- Type
- MCC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MCC
- Electronic Component
- BZX84C3V9HE3-TP
- Electronic Component
- 1
- Package
- SOT-23
- Electronic Component
- Zener Diode
- Electronic Component
- ±5%
- Electronic Component
- 0.032g
- Electronic Component
- 1
- (Zzk)
- 600Ω
- (Zzt)
- 90Ω
- Electronic Component
- BM0265158989
- Diode
- 1
- Current(Ir)
- 3uA@1V
- Power Dissipation(Pd)
- 350mW
- Electronic Component
- 3.7V~4.1V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
BZX84C3V9HE3-TP 产品概述
一、概述
BZX84C3V9HE3-TP 是 MCC（美微科）出品的一款 3.9V 单体稳压二极管，封装为 SOT-23，额定耗散功率 350mW，公差 ±5%。器件针对低功耗、体积受限的消费电子和工业控制场景设计，适用于基准稳压、浪涌钳位与低电平保护等应用。
二、主要参数
- 标称稳压值：3.9V（范围 3.7V ～ 4.1V，精度 ±5%）
- 反向漏电流 Ir：3µA @ 1V
- 最大耗散功率 Pd：350mW
- 稳压阻抗 Zzt：90Ω
- 转折区阻抗 Zzk：600Ω
- 工作结温度：-55℃ ～ +150℃
- 封装：SOT-23（单只独立式）
三、特性亮点
- 低漏电流（3µA@1V），适合电池供电及低待机电流应用。
- 较低的稳压阻抗（Zzt=90Ω）在额定测试点提供较好的稳压能力。
- SOT-23 小封装便于空间受限 PCB 布局与自动贴装。
- 宽工作结温度范围，适应工业级温度要求。
四、典型应用
- 小功率基准电压源与参考电压稳定电路；
- 低电压电源的浪涌和反向保护；
- 信号线夹止、过压限幅；
- 电池供电设备、便携式仪器、传感器接口和低功耗嵌入式系统。
五、设计与使用建议
- 串联限流电阻 R 计算：R = (Vin - Vz) / Iz，其中 Iz 为期望的稳流电流。注意所选 Iz 在 Pd 限制内：Iz_max ≈ Pd / Vz ≈ 350mW / 3.9V ≈ 89.7mA（实际使用时建议远低于此值以保证可靠性与热裕度）。
- 在环境温度升高时，应按器件数据手册的功率-温度降额曲线降额使用，避免长期在 Pd 附近工作。
- 对于瞬态响应要求较高的场合，可在齐纳两端并联小电容以抑制噪声与尖峰。
- 布局时保证散热路径：SOT-23 的引脚和铜箔面积影响热阻，建议在 PCB 上留出足够的铜箔并避免过度靠近热敏元件。
六、可靠性与选型注意
- 器件工作结温范围宽，可满足大多数工业与民用温度要求，但在高温、长期高功耗条件下需关注降额和寿命。
- 在设计前参考完整数据手册（包括 IV 曲线、阻抗随电流变化、Pd-Tj 曲线与包装信息）以获得精确的仿真与热设计参数。
- 批量采购时注意器件标识与包装形式（TP 卷盘/带装），并向供应商确认批次一致性与出货检验标准。
总结：BZX84C3V9HE3-TP 提供稳定的 3.9V 基准、低漏电特性与 SOT-23 小封装，是用于低功耗、体积受限电路中常用的稳压二极管器件。合理的电流限流与热设计能充分发挥其性能并保证长期可靠性。
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