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ON 1N4738ATR
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ON 1N4738ATR
- Type
- ON
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ON
- Electronic Component
- 1N4738ATR
- Electronic Component
- 1
- Package
- DO-41
- Electronic Component
- Zener Diode
- Electronic Component
- 0.36g
- Electronic Component
- 1
- (Zzk)
- 700Ω
- (Zzt)
- 4.5Ω
- Electronic Component
- BM0264497901
- Diode
- 1
- Current(Ir)
- 10uA@6V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 7.79V~8.61V
- Electronic Component
- 65℃~+200℃
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
1N4738ATR稳压二极管产品概述
一、品牌与封装规格
1N4738ATR由安森美（ON Semiconductor） 生产，属于通用稳压二极管系列。其封装采用DO-41轴向插件式，尺寸为直径2.03mm、长度4.06mm，体积紧凑且引脚引出方式适配常规电路板焊接（手工/自动插件均可）。DO-41封装耐机械应力性能良好，适合多数电子设备的安装环境，无需额外散热结构即可满足小功率需求。
二、核心电气参数解析
该稳压管的关键参数直接决定应用场景，具体如下：
- 稳压值：标称8.2V，实际工作范围7.79V~8.61V（对应±5%精度），满足低精度稳压需求；
- 耗散功率（Pd）：最大1W，支持小功率电路持续工作（常规电流下无需散热）；
- 反向漏电流（Ir）：6V反向偏置时仅10μA，反向截止状态功耗极低，开关特性稳定；
- 动态阻抗：包含两个关键指标——Zzt=4.5Ω（稳压工作点下，输出电压随电流变化幅度小，稳压效果佳）；Zzk=700Ω（接近击穿起始点的阻抗，稳压启动平滑）；
- 工作结温：-65℃~+200℃，宽温区覆盖工业级、户外设备等 harsh 环境。
三、稳压性能与可靠性特点
1N4738ATR的性能优势体现在：
- 稳压精度可控：±5%的电压范围，避免波动损坏后级元件，适合对精度要求不苛刻的场景；
- 低漏电流提升效率：10μA的反向漏电流减少待机功耗，适配电池供电或低功耗设备；
- 宽温区可靠性：-65℃至200℃的结温范围，长期工作不易出现参数漂移，适应极端温度环境；
- 动态响应良好：4.5Ω的低动态阻抗，负载电流小幅变化时输出电压稳定，适合负载波动小的场景。
四、典型应用场景
结合参数与性能，该稳压管适用于：
- 小功率电源稳压：并联在5V/12V输入的小电源（如单片机开发板、传感器模块）输出端，稳定电压；
- 过压保护：并联在敏感电路（如通信模块、模拟传感器）输入端，电压超8.2V时击穿钳位，保护后级；
- 低精度基准源：替代专用基准源，用于简易电压比较器、小型仪表的参考电压；
- LED驱动辅助：配合限流电阻稳定LED工作电压，延长寿命；
- 工业/通信设备：适配PLC辅助电源、基站小功率稳压环节等 harsh 环境。
五、使用注意事项
为确保稳定工作，需注意：
- 极性识别：带色环端为负极，需反向击穿工作（正向无稳压作用）；
- 限流电阻计算：需串联限流电阻（公式：R=(Vin-Vz)/Iz，Iz≤122mA（Pd/Vz））；
- 焊接温度：焊接温度≤260℃（持续≤5秒），避免损坏芯片；
- 散热控制：大电流工作时需确保散热，避免结温超200℃。
1N4738ATR凭借紧凑封装、稳定性能与宽温特性，成为小功率稳压/保护场景的高性价比选择，广泛应用于消费电子、工业控制等领域。
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