Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
ST 1N4751APF-M Zener diode 1N4751APF
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST 1N4751APF-M
- Type
- ST
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ST
- Electronic Component
- 1N4751APF-M
- Electronic Component
- 1
- Package
- DO-41
- Electronic Component
- Zener Diode
- Electronic Component
- 0.255g
- Electronic Component
- 1
- (Zzk)
- 1kΩ
- (Zzt)
- 40Ω
- Electronic Component
- BM0259564328
- Diode
- 1
- Current(Ir)
- 5uA@1V
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 28.5V~31.5V
- 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.
1N4751APF-M 30V 1W 稳压二极管 产品概述
一、主要参数
1N4751APF-M 为 ST（先科）出品的无铅 DO‑41 封装稳压二极管，标称稳压值 30V。关键参数如下：
- 稳压值（标称）：30V
- 稳压值范围：28.5V ~ 31.5V（典型公差约 ±5%）
- 反向电流 Ir：5 μA @ 22.8V
- 最大耗散功率 Pd：1W（在规定温度和散热条件下）
- 直流/交流阻抗：Zzt = 40 Ω，Zzk = 1 kΩ
- 封装：DO‑41 轴向引线式，适用于通孔安装；无铅（RoHS）
二、电气性能详解
稳压二极管在反向工作区域作为齐纳/雪崩稳压源使用。30V 标称值表示在测试电流下的稳定电压附近工作。Zzt（交流动态阻抗）为 40 Ω，表明在正常工作点对小幅负载变化有一定的电压变化；Zzk（在击穿拐点的阻抗）较高（1 kΩ），提示在低电流到工作电流转变区域电压斜率较陡。反向漏电 Ir 在 22.8V 时为 5 μA，反映低电压下的漏电性能，利于低功耗设计。
三、封装与热特性
DO‑41 轴向封装便于通孔焊接与维修。1W 的耗散能力受限于环境温度与散热条件，通常需在 PCB 上留足铜皮或缩短引线以利散热；在高温或连续大电流条件下应做功率降额。具体温度系数和降额曲线请参照厂商数据手册。
四、典型应用场景
- 电源轨的稳压与保护：作为 30V 参考或并联稳压单元，用于为后级电路提供粗稳压。
- 过压钳位：保护敏感器件或输入端免受瞬态过压。
- 测试与校准：在需要 30V 固定参考的仪器中做基准电压源（需配合稳流源或限流电阻）。
- 通用电源模块、工业控制等要求中高电压稳压场合。
五、使用注意事项与选型建议
- 由于为并联稳压器件，需配置合适的限流电阻或上游恒流源以限制功耗；避免超过 1W 额定耗散。
- 对于低纹波、高精度稳压场合，注意 Zzt 较大可能带来输出电压随电流变化明显，必要时选择低阻抗或更高功率级别器件。
- 焊接时遵循无铅工艺温度曲线，避免长时间高温暴露影响性能。
- 在高温或密集布线的设计中，预留充足散热面积或采用散热片以防止功耗过热。
- 选型时参考完整的数据手册以获取测试条件（如测试电流 Izt、温度系数、最大反向电压等）以保证电路可靠性。
如需更详细的电气特性曲线、典型接线图或温度降额曲线，可提供数据手册以便进一步分析和设计建议。
Request for quote
Send RFQ
Use the form for single models, category sourcing, and multi-line BOM requirements.
Product sourcing intelligence
Model, package, availability, and BOM fit reviewed before quotation.
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
BOM matching & alternatives
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Sourcing availability signal
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Examples of how common component sourcing requests are organized.
Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.
The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
Related products
Packaged components ready for RFQ.
1 Piece Integrated Circuit for IRS20124S IRS21956S SOP-20 IRS2453DS SOP-14
- Model
- IRS20124S
- Package
