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CJ PZTA44
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- CJ PZTA44
- Type
- CJ
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- CJ
- Electronic Component
- PZTA44
- Electronic Component
- 1
- Package
- SOT-223
- Electronic Component
- 1 NPN
- Electronic Component
- Transistor(BJT)
- Electronic Component
- 0.27g
- Electronic Component
- 1
- Electronic Component
- BM0227126123
- Operating Temperature
- 55℃~+150℃
- Transistor Type
- NPN
- Frequency(f T)
- 20MHz
- Power Dissipation(Pd)
- 1W
- Electronic Component
- Electronic Component
- Electronic Component
- 2500
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
PZTA44 三极管（NPN）产品概述
一、主要参数概览
- 型号：PZTA44
- 厂商：CJ（江苏长电 / 长晶）
- 封装：SC-73 (SOT-223)
- 极性：NPN，数量：1只
- 集电极击穿电压 Vceo：400 V
- 集电极电流 Ic（最大）：200 mA
- 直流电流增益 hFE：40 @ Ic=1 mA, Vce=10 V
- 特征频率 fT：20 MHz
- 集电极截止电流 Icbo：100 nA
- 射基极击穿电压 Vebo：6 V
- 集射极饱和电压 VCE(sat)：≤750 mV（典型，Ic=50 mA, Ib=5 mA）
- 功耗 Pd：1 W
- 工作温度：-55 ℃ ~ +150 ℃
二、主要特性与电性能解读
PZTA44 属于高耐压、低至中电流的 NPN 开关/放大型三极管。400 V 的 Vceo 使其适合在交流整流侧或高压开关场合工作；Ic 最大200 mA 与 Pd 1 W 指出器件适用于低功耗、高压的开关或线性应用。hFE 在小电流点为40，随电流增加会下降，说明在大电流或饱和开关时需要较大的基极驱动电流（强制 β 较低）。fT=20 MHz 表明器件适合低频到中频开关或放大，而非射频应用。Icbo 仅 100 nA，关断泄漏小，有利于高压断态稳定性。
三、典型应用场景
- 开关电源主开关或辅助开关（低功耗反激、高压开关场合）
- 电视、显示器类高压驱动或保护电路的开关元件
- 工业电源、适配器与充电器中高压侧的小功率开关
- 一般低/中频开关与驱动电路、继电器驱动（注意电流限值）
- 高压检测、保护与隔离电路
四、封装与热管理要点
封装标注为 SC-73 (SOT-223)，实际使用时请核对厂商数据页的引脚排列与热沉方式。Pd=1 W 表示在良好散热条件下的最大耗散，实际 PCB 需要做铜箔散热，必要时增加散热铜面积或采用过孔散热。工作环境温度升高时需按热阻及结温限制进行功耗降额：保持结温 Tj ≤150 ℃，并预留安全裕度。
五、实用设计建议
- 饱和开关时按经验采取强制 β=10~20 计算基极电流。例如欲开关 Ic=50 mA，按 VCE(sat) 规格 Ib≈5 mA；若 Ic=100 mA，建议 Ib≈10 mA。
- 基极到发射极反向电压 Vebo=6 V，避免基极被反向击穿；在驱动回路中可并联钳位二极管或限流电阻。
- 高压切换场合推荐使用 RC 吸收或 TVS 保护以抑制瞬态过压。
- 在选型与布局时确认封装标识与引脚，尤其是功率散热引脚与 PCB 热铜连接。
六、选型与采购注意
购买时请索取 CJ 官方数据手册确认完整电气特性、引脚图和包材信息；量产设计环节建议做环境温度与老化测试以验证长期可靠性。PZTA44 适合需要高耐压、低至中等电流的工业与消费类电源开关场合。
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