Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
DOWO 1N5819HW
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO 1N5819HW
- Type
- DOWO
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- 1N5819HW
- Electronic Component
- 1
- Package
- SOD-123
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.033g
- Electronic Component
- 1
- Electronic Component
- BM0264356083
- Current
- 1A
- Diode
- Electronic Component
- (Vf)
- 900mV@3A
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
- Voltage Rating(Vr)
- 40V
- Surge Current (Ifsm)
- 9A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
1N5819HW（DOWO）产品概述
一、主要参数
1N5819HW 为 DOWO（东沃）生产的独立式肖特基二极管，关键参数如下：正向压降 Vf = 900 mV（测于 3 A）、直流反向耐压 Vr = 40 V、整流电流 Io = 1 A、非重复峰值浪涌电流 Ifsm = 9 A。封装为 SOD-123，适合表面贴装应用。器件针对低压、高频环境进行了优化，适合续流与极性保护场合。
二、特性与优势
- 高电流能力：尽管额定整流电流为 1 A，器件在短脉冲下可承受高达 9 A 的峰值浪涌，满足启动或突发负载要求。
- 低正向压降：在高电流条件下仍保持较低 Vf，有利于降低导通损耗和热升。3 A 时 Vf 为 0.9 V，实际 1 A 工作点上的 Vf 通常更低，从而降低功耗。
- 快速恢复与低反向恢复损耗（肖特基特性）：适用于高频逆变器与开关电源中续流路径，能够降低切换损耗与电磁干扰。
三、典型应用
- 低压、高频逆变器的续流二极管
- 电源极性保护与反接保护电路
- 开关电源（SMPS）辅助整流/钳位
- 汽车电子的保护电路（注意温度与浪涌条件）
四、封装与热管理
SOD-123 为小型表贴封装，有利于高密度 PCB 布局，但其散热能力有限。典型设计需考虑：
- 在 1 A 连续工作时评估 Vf 导致的功耗（P ≈ Vf × I），并据此安排铜箔面积与散热路径；
- 使用较宽的焊盘和底层大铜面积以降低结-壳热阻，必要时在 PCB 下方设计散热槽或多层过孔散热。
五、设计与选型建议
- 对于连续 1 A 负载，验证在目标温度下正向压降与结温关系；高温下 Vf 与反向漏电增加，应留有裕量。
- 浪涌 Ifsm = 9 A 为非重复峰值，受脉宽与波形影响，不能作为长期过载依据；长脉冲或重复冲击需选用更高 Ifsm 或更大封装器件。
- 若电路存在高幅值尖峰或反向电压过渡，请额外配合瞬态抑制器（TVS）或 RC 抑制网络保护二极管。
六、注意事项与可靠性
- 肖特基二极管的反向漏电随温度显著上升，在高温环境下应重点关注漏电与热失控风险；
- 焊接工艺按 SOD-123 推荐温度规范执行，避免过热导致封装或焊料劣化；
- 在关键应用场合，建议参照厂方完整数据手册获取 Ir、热阻、可靠性与寿命等详细参数。
总结：1N5819HW（DOWO）为面向低压、高频场合的肖特基整流器件，具有低 Vf、高峰值浪涌能力和小型 SOD-123 封装，适合续流与极性保护等应用。选型时应结合实际工作电流、峰值冲击和热管理方案进行综合评估。
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.
1 Piece Integrated Circuit for IRS20124S IRS21956S SOP-20 IRS2453DS SOP-14
- Model
- IRS20124S
- Package
