Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
MSKSEMI 1SMAF4742A-MS 1SMAF4742A
Configuration
1 options
Configuration
Electronic Component
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MSKSEMI 1SMAF4742A-MS
- Type
- MSKSEMI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MSKSEMI
- Electronic Component
- 1SMAF4742A-MS
- Electronic Component
- 1
- Package
- SMAF
- Electronic Component
- Zener Diode
- Electronic Component
- 0.055g
- Electronic Component
- 1
- (Zzt)
- 9Ω
- Electronic Component
- BM0265529371
- Diode
- 1
- Current(Ir)
- 5uA
- Power Dissipation(Pd)
- 1W
- Electronic Component
- 11.4V~12.6V
- Electronic Component
- 55℃~+150℃
- 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.
1SMAF4742A-MS 产品概述
一、产品简介
1SMAF4742A-MS（品牌：MSKSEMI 美森科）是一款独立式稳压/浪涌抑制二极管，封装为SMAF，适用于中低功率的过压保护与稳压应用。器件标称稳压值为12V，具有低反向漏电、高温工作能力和较低的动态阻抗，适合对瞬态浪涌和稳态过压有可靠抑制需求的电路保护场景。
二、主要电气参数
- 稳压值（标称）：12V；稳压范围：11.4V ~ 12.6V
- 反向电流 (Ir)：最大 5 μA（在规定偏压下）
- 耗散功率 (Pd)：1 W（器件最大功耗，需参照散热条件）
- 动态阻抗 (Zzt)：9 Ω（在指定浪涌条件下）
- 工作结温范围：-55 ℃ 至 +150 ℃
- 器件配置：独立式二极管，未分类说明长期和瞬态行为需参考完整数据手册
三、特点与优势
- 稳压精度良好：11.4V~12.6V 的稳压范围满足常见12V系统的稳压或基准保护要求。
- 低漏电：5 μA 的低反向电流适合对静态功耗敏感的电源或备份电路。
- 抗浪涌能力：9 Ω 的动态阻抗在浪涌吸收时可有效限制峰值电压，减轻后端元件应力。
- 宽温工作：-55℃~+150℃ 的结温范围支持汽车级或工业级应用场景（需验证具体认证）。
- 紧凑封装：SMAF 封装便于PCB布局，适合表面贴装工艺与自动化生产。
四、典型应用场景
- 电源总线的过压保护与稳压参考（12V系统）
- 通信设备、工业控制和车载电子中的瞬态抑制与浪涌吸收
- 逆向保护与浪涌防护模块的前级防护元件
- 电池管理、充电器输出端保护以及电源滤波后的再稳压
五、选型与使用建议
- 散热设计：Pd 标称为1W，实际最大耗散与PCB铜箔面积、环境温度和空气流动密切相关，建议在PCB上增加散热面或使用散热过孔。
- 浪涌考量：若需承受短时大电流冲击，需参考完整浪涌曲线与脉冲功率等级，必要时并联或选用更高能量等级器件。
- 温度裕量：在高温环境下，建议留有足够的结温余量以延长寿命并降低漏电增长带来的影响。
- 串联/并联注意事项：并联时应保证电压均衡与热分布一致；串联使用需注意稳压偏移与功耗分配。
- 测试验证：在系统级验证中进行ESD、峰值浪涌及长期老化测试，确保满足目标应用的可靠性要求。
六、可靠性与质量提示
MSKSEMI（美森科）系列产品通常提供器件批次规格表与环境测试结果。使用前请索取并核对完整数据手册和可靠性报告，确认器件在目标应用条件下的浪涌能力、热阻与封装机械强度。如用于关键/汽车级系统，建议选用经过相关认证的同系列或更高等级器件。
如需更详细的电气特性曲线、脉冲功率参数或封装尺寸图，可提供进一步资料以便核对和评估。
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.
