Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
DOWO 5.0SMDJ18A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO 5.0SMDJ18A
- Type
- DOWO
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- 5.0SMDJ18A
- Electronic Component
- 1
- Package
- SMC(DO-214AB)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.042g
- Electronic Component
- 1
- Electronic Component
- BM0264548684
- Operating Temperature
- 55℃~+150℃
- Voltage
- 29.2V
- Current(Ir)
- 10uA
- Voltage(VBR)
- 20V
- 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.
5.0SMDJ18A 产品概述
一、产品简介
5.0SMDJ18A 是 DOWO（东沃）推出的一款高功率瞬态抑制二极管（TVS），单向结构，封装为 SMC（DO-214AB）。器件采用玻璃钝化芯片工艺，响应极快、钳位性能优异，适用于对瞬态过电压有严格保护要求的电源、通信和工业控制系统。
二、主要电气参数
- 反向工作电压（Vrwm）：18 V（单向）
- 击穿电压（VBR）：20 V
- 钳位电压：29.2 V（典型）
- 峰值脉冲电流（Ipp）：171.2 A（10/1000 μs 波形）
- 峰值脉冲功率（Ppp）：5000 W（10/1000 μs，重复率/占空比 0.01%）
- 反向泄漏电流（Ir）：≤ 10 μA
- 工作温度范围：-55 ℃ ~ +150 ℃
- RoHS 符合性
三、性能特点
- 玻璃钝化芯片：提高可靠性与稳定性，抗电迁移能力强。
- 超快响应：能在纳秒级别响应瞬态冲击，迅速将过电压钳制到安全范围。
- 低泄漏电流：在正常工作电压下对系统影响微小，有利于低功耗设计。
- 高峰值吸收能力：5000 W（10/1000 μs）脉冲功率，适应雷击和开关瞬态等严重工况。
- 单/双向型号可选：本型号为单向，应用于需要极性保护的电路。
四、典型应用场景
- 开关电源及直流配电保护（DC bus、DC-DC 转换器输入端）
- 通信设备（基站、光纤收发模块、电信接口）
- 工业控制与自动化（PLC、伺服驱动、传感器接口）
- 汽车电子（车载电源防护、摄像头/雷达接口，需校验车辆规范）
- 电源浪涌和雷电浪涌防护系统
五、选型与使用建议
- 留有裕量：Vrwm（18 V）与系统最大工作电压应保持适当余量，避免长期接近击穿区。
- PCB 布局：将 TVS 放置在易受冲击的输入端，尽量缩短到被保护端子的走线，增大铜箔以利散热。
- 热管理：在高能脉冲环境下注意热量积累，遵循制造商关于重复脉冲（占空比 0.01%）的限制，必要时增加散热结构。
- 并联注意：如需更高吸收能力，采用并联时需保证每只器件的电气匹配，推荐使用相同批次器件并进行验证。
六、封装与可靠性
SMC（DO-214AB）封装提供良好的机械强度和热散能力，适合手工焊接与自动贴片工艺。器件在-55 ℃ 至 +150 ℃范围内保持稳定性能，适应严苛环境与长期可靠性需求。
七、结论
5.0SMDJ18A 以其 5000 W 的峰值脉冲吸收能力、低泄漏、快速响应与优秀的钳位性能，适合用于要求高可靠性和强抗冲击能力的电源与信号线路保护。选型时请结合实际工作电压、脉冲能量和热管理要求，按需配置以确保长期稳定运行。若需进一步的曲线数据、封装图或可靠性认证资料，建议联系 DOWO 正式渠道获取详细数据手册。
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
