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HZ5B1PF是ST(先科)推出的一款小功率轴向封装稳压二极管,采用DO-35标准封装,以稳定的电压特性、低漏电流和紧凑尺寸,广泛应用于小信号电路的电压基准、过压保护等场景。以下从产品基本信息、核心参数、封装特性、应用场景及使用注意事项展开详细说明。
稳压二极管的性能由电参数直接决定,HZ5B1PF的关键参数及实际意义如下:
该器件的齐纳击穿电压覆盖4.6V至4.8V区间,标称值接近4.7V,属于常见“5V级”稳压管范畴。窄范围稳压值(波动仅0.2V)表明器件一致性优异,无需额外校准即可满足多数小信号电路的基准需求。
反向漏电流是稳压管工作在反向截止区(电压远低于稳压值)时的漏电流。HZ5B1PF在1.5V反向电压下仅5uA,远低于同类器件典型值(通常10uA以上),说明反向截止特性优异,待机功耗极低,适合电池供电的便携设备等对静态功耗敏感的场景。
DO-35封装的典型功率等级为500mW,即25℃环境下器件可承受的最大功耗。实际使用需注意功率降额:环境温度每升高10℃,最大允许功耗需降低约10%(如100℃时Pd降至300mW左右),避免过热失效。
动态阻抗反映稳压管击穿区“电压变化量/电流变化量”的比值(Zzt=ΔVz/ΔIz)。HZ5B1PF的100Ω动态阻抗在小功率稳压管中属于中等偏优水平——负载电流或输入电压波动时,输出稳压值波动小,可有效稳定小信号电路工作电压。
DO-35封装是轴向引线稳压管的标准封装,具有以下特点:
结合参数特性,HZ5B1PF的典型应用包括:
为确保可靠性,使用时需注意:
总结:HZ5B1PF是性价比优异的小功率稳压管,凭借稳定的4.7V级稳压、低漏电流和紧凑封装,可满足多数低电流小信号电路的电压稳定需求,是电子设计中的常用基础器件。
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