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ST 1N4741APF Zener diode 1N4741APF
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST 1N4741APF
- Type
- ST
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ST
- Electronic Component
- 1N4741APF
- Electronic Component
- 1
- Package
- DO-41
- Electronic Component
- Zener Diode
- Electronic Component
- 0.228g
- Electronic Component
- 1
- (Zzk)
- 700Ω
- (Zzt)
- 8Ω
- Electronic Component
- BM0227341738
- Diode
- 1
- Current(Ir)
- 5uA
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 10.45V~11.55V
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
1N4741APF（11V，1W）产品概述
一、产品简介
1N4741APF 是一款标称稳压值为 11V 的稳压（二极管）器件，额定耗散功率 1W，采用 DO-41 直插封装并且无铅（RoHS）处理，由 ST（先科）品牌生产。该器件常用于低功耗稳压参考、浪涌抑制与电平夹位等场景，体积小、成本低、易于在通用电源电路中使用。
二、主要电气参数
- 标称稳压值（Vz）：11V
- 稳压范围：10.45V ～ 11.55V
- 最大耗散功率（Pd）：1W（器件温度和环境需考虑降额）
- 反向电流（Ir）：≤ 5 μA（在规定测试电压下）
- 阻抗 Zzk：700 Ω（低电流或特定测试条件下的阻抗指标）
- 阻抗 Zzt：8 Ω（在测定工作点/测试电流下的动态阻抗）
- 封装：DO-41，无铅
三、性能要点与解读
- 稳压精度：提供 11V 左右的稳压参考，稳压范围表明在典型工作条件下输出围绕 11V 波动在 ±5% 以内。
- 动态阻抗：Zzt 值较低（8 Ω）说明在推荐工作点附近电压调节能力较好，负载电流变化时输出电压波动小；Zzk 较大（700 Ω）代表在较低电流或特殊测试条件下阻抗会显著增大，须注意工作点选择。
- 反向漏流：Ir ≤ 5 μA，适合需要低泄漏的直流参照或偏置电路。
- 功率与热管理：Pd = 1W 是器件在规定环境温度下的最大耗散，实际使用需要考虑结温和环境温度的降额。若做分流稳压，应通过串联限流电阻或适当散热确保不超过器件耗散极限。
四、实用计算与选型建议
- 最大稳流近似：Iz_max ≈ Pd / Vz = 1W / 11V ≈ 90 mA。该值为理论上限，实际电路中应留安全余量（通常远小于此值）并避免长期靠近极限工况。
- 串联电阻计算（用作并联稳压器时）：R = (Vin - Vz) / Iz。其中 Iz 为期望流过稳压二极管的电流。示例：若 Vin = 15V，希望 Iz = 20 mA，则 R = (15 - 11) / 0.02 = 200 Ω。
- 若工作在低电流区，应关注 Zzk 的显著影响，可能出现稳压精度下降。
五、应用场景
- 小功率稳压参考：为模拟电路、数据采集前端提供低成本参考电压。
- 电平夹位与过压保护：用于输入信号或功率线的过压钳位与浪涌吸收。
- 偏置与参考源：为放大器偏置、比较器参考提供稳定电压基准。
六、封装与可靠性注意
DO-41 封装易于通孔安装，适合手工焊接和批量波峰/回流焊工艺（需参考厂商的温度曲线）。无铅工艺保证符合 RoHS 要求。长期可靠性取决于结温和电流应力，建议在设计时预留热裕量，并避免在高温高电流组合下长期工作。
总结：1N4741APF 是一款适用于小功率稳压与保护用途的 11V 1W 型稳压二极管，具有低动态阻抗和低漏电特性。在电路设计时注意限流、热管理与工作点选择，即可发挥稳定可靠的稳压性能。
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