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PANJIT 1SMA4753_R1_00001
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- PANJIT 1SMA4753_R1_00001
- Type
- PANJIT
- Minimum package
- 1800 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- PANJIT
- Electronic Component
- 1SMA4753_R1_00001
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Zener Diode
- Electronic Component
- 0.109g
- Electronic Component
- 1
- (Zzk)
- 1kΩ
- (Zzt)
- 50Ω
- Electronic Component
- BM0264878185
- Diode
- 1
- Current(Ir)
- 100nA
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 34.2V~37.8V
- Electronic Component
- 50℃~+150℃
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
1SMA4753_R1_00001 产品概述
一、产品简介
1SMA4753_R1_00001 为 PANJIT（强茂）出品的一颗独立式稳压二极管，封装为 SMA（DO-214AC）。标称稳压值 36V，稳压范围 34.2V～37.8V，适合作为中高压小功率稳压与钳位元件。反向漏电流规格为 100nA（在 27.4V 时），结温工作范围为 -50℃ ～ +150℃，最高耗散功率 Pd = 1W。
二、主要电气性能
- 标称稳压：36V，允许范围 34.2V～37.8V。
- 反向漏电 Ir：100nA @ 27.4V，低漏电利于高阻抗偏置场合。
- 耗散功率 Pd：1W，适用于小功率稳压或瞬态吸收。
- 小信号阻抗 Zzt：50Ω（测试工况下），表示在中等偏流时的动态阻抗较低；
- 低流阻抗 Zzk：1kΩ，表明在低电流或拐点附近稳压性能下降明显。
以上参数说明该器件在数 mA 级工作电流时具有较好稳压效果，但在微安级下稳压精度会变差。
三、功率与电流计算（实用指导）
在稳压工作时应保证二极管耗散功率不超限：Iz_max ≈ Pd / Vz = 1W / 36V ≈ 27.8mA。因此设计时应选择系列限流电阻 R，使通过二极管的电流 Iz 在安全范围内。常用经验工作电流可选 5–15mA，以兼顾稳压精度与热耗散。计算公式：
- R = (Vin_min − Vz) / Iz
- Pd_actual = (Vin − Vz) × Iz
设计时同时考虑最坏工况（最高 Vin 与最高环境温度）。
四、封装与可靠性
SMA（DO-214AC）为贴片封装，适合回流焊与自动贴装。封装对热散能力有限，建议通过 PCB 铜箔散热和热导通孔改善热量释放。结温上限 150℃，长期使用时需参照 Pd 与环境温度关系做功率降额处理。
五、典型应用场景
- 中高压基准/偏置源（需小电流偏置的放大电路）
- 输入/输出端的电压钳位与浪涌吸收（配合限流电阻）
- 保护电路中作稳定点或参考电压器件
六、选型与使用注意
- 若电路工作在极低电流（微安级），请注意 Zzk 较高会导致稳压偏移，必要时选择低电流专用参考器件。
- 长时间高温工作需降低电流以防 Pd 超限并延长寿命。
- 贴片焊接按厂商回流曲线处理，避免超过结温限制。
- 实际系统中推荐在样机上验证稳压精度、温漂及热分布，确保长期可靠。
以上为 1SMA4753_R1_00001 的关键特性与工程应用建议，便于在电源管理和保护设计中快速评估与部署。若需更详尽的温升曲线、典型特性曲线或封装尺寸图，可进一步提供数据手册索引或样片测试结果。
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