Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
DOWO SMAJ70CA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMAJ70CA
- Type
- DOWO
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMAJ70CA
- Electronic Component
- 1
- Package
- 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
- BM0258760019
- Operating Temperature
- 55℃~+150℃
- Voltage
- 113V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 77.8V
- 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.
SMAJ70CA 产品概述
一、产品简介
SMAJ70CA 是东沃（DOWO）推出的一款双向瞬态电压抑制二极管（TVS），封装为 DO-214AC（SMA）。器件针对瞬态浪涌和脉冲干扰的抑制而设计，适用于直流与交流两种极性可能反转的保护场合。工作温度范围宽（-55℃～+150℃），适应工业级应用环境。
二、主要电气参数
- 极性：双向
- 反向截止电压 Vrwm：70 V（额定稳压工作电压）
- 击穿电压 Vbr：77.8 V（典型）
- 钳位电压 Vc：113 V（在峰值脉冲电流下）
- 峰值脉冲电流 Ipp：3.54 A（对应 10/1000 µs 浪涌波形）
- 峰值脉冲功率 Ppp：400 W（10/1000 µs）
- 反向漏电流 Ir：1 µA（常温）
- 工作温度：-55℃～+150℃
三、主要特性与优势
- 双向保护：对称钳位，适合两极性脉冲或交流线路的浪涌抑制。
- 高瞬态吸收能力：400 W（10/1000 µs）峰值功率，能承受一次性较强的浪涌能量。
- 低漏电流：1 µA（典型），在待机或高阻抗电路中对系统影响小。
- 宽温度范围：可在严苛环境下稳定工作，适合工业级应用。
- SMA 封装（DO-214AC）：适合表面贴装，便于自动化生产与板级保护布局。
四、典型应用场景
- 电源线路保护（如48V通信电源、工业电源）
- 接口及信号线路防浪涌（串口、CAN 总线、RS-485 等）
- 工业控制设备、仪表与电源模块的端口保护
- 消费电子与通信设备需防雷击、开关电源反向浪涌场合
五、封装与 PCB 布局建议
- 使用 DO-214AC（SMA）表贴封装，焊盘按厂家推荐尺寸设计。
- 将 TVS 尽量靠近被保护器件或接口放置，缩短走线，减小寄生电感。
- 增加散热铜箔面积以帮助吸收脉冲能量并降低温升。
- 对地线采取低阻抗、短回路的走线，必要时使用多层接地平面。
六、可靠性与热管理
在高能脉冲下器件会产生显著热量，建议评估能量累积与重复浪涌频率，对可能的连续应力进行电路级限制或并用更高能量等级的防护元件。遵循生产厂家的焊接与回流曲线规范，避免过热损伤封装或内部结构。
七、使用注意事项
- 选型时确认系统最大工作电压不超过 70 V（Vrwm），并留有安全裕量。
- 对于重复高能脉冲或雷击环境，考虑更高功率或外加保护方案组合使用。
- 储存与安装时注意防静电、防潮、防机械应力。
总结：SMAJ70CA 以其双向抑制、高峰值功率与低漏电流特性，适合对 70 V 级别电源或双向信号线的浪涌保护，是工业与通信类设备端口保护的可靠选择。若需更详细的回流焊工艺、典型导通曲线或能量吸收曲线，请参考东沃产品资料或联系供应商获取完整数据手册。
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 BGA Integrated Circuit Chipset MN864739 CXD90061GG CXD90062GG PS5 QFN-80
- Model
- MN864739
- Package
