Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
DOWO SMAJ12A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMAJ12A
- Type
- DOWO
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMAJ12A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.12g
- Electronic Component
- 1
- Electronic Component
- BM0264356069
- Operating Temperature
- 55℃~+150℃
- Voltage
- 19.9V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 13.3V
- 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.
SMAJ12A 产品概述
一、产品简介
SMAJ12A 是 DOWO（东沃）推出的一款单向 TVS 浪涌吸收二极管，封装为 SMA（DO-214AC）。器件采用玻璃钝化芯片工艺，具有极快的响应速度和优异的钳位能力，专为抑制瞬态过压（如雷击、电感突变或开关干扰）设计，适用于电源线、通信接口和汽车电子等场景。
二、关键参数
- 极性：单向
- 反向截止电压 Vrwm：12 V
- 击穿电压 VBR：13.3 V（典型）
- 钳位电压：19.9 V（Ipp 条件下）
- 峰值脉冲电流 Ipp：20.1 A（10/1000 μs 波形）
- 峰值脉冲功率 Ppp：400 W（10/1000 μs，重复率/占空比 0.01%）
- 反向电流 Ir：1 μA（常温下，Vrwm 条件）
- 工作温度范围：-55 ℃ ~ +150 ℃
- 符合 RoHS 要求
三、主要特性
- 玻璃钝化芯片，提高长期可靠性与稳定性。
- 10/1000 μs 波形下 400 W 峰值脉冲功率，适应较大能量的浪涌事件。
- 低漏电流，适合对静态功耗有要求的电路。
- 出色的钳位能力，能在瞬态发生时将电压限制在安全范围内，保护后端器件。
- 响应时间极快，典型为纳秒级，能有效抑制快速上升的瞬态脉冲。
- 提供单向（本型号）与双向单元以满足不同应用需求。
四、应用场景
- 电源线过压保护（适配器、电源输入）
- 通信接口与数据线防护（以太网、串行总线等）
- 汽车电子系统（24V/12V 电源浪涌防护）
- 工业设备与电机驱动系统的瞬态抑制
- 门禁、安防及仪表等敏感电子模块保护
五、封装与可靠性建议
- 封装：SMA（DO-214AC），适合表面贴装工艺（SMT），便于自动化生产与回流焊接。
- 布局建议：靠近被保护端口放置，尽量缩短引线长度以降低寄生感抗，保证最佳响应与能量散布。
- 散热与寿命：在频繁或高能量浪涌场景，应考虑器件功耗与PCB散热设计；遵循数据手册规定的重复率（占空比）以免降低寿命。
SMAJ12A 以其高能量吸收能力、低漏电和可靠的钝化工艺，为需要稳健瞬态保护的系统提供了经济且高效的解决方案。欲获取完整电气特性曲线与应用电路建议，请参照 DOWO 官方数据手册或联系供应商技术支持。
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.
