Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
DOWO SMAJ120CA
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- DOWO SMAJ120CA
- Type
- DOWO
- Minimum package
- 5000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- DOWO
- Electronic Component
- SMAJ120CA
- 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
- BM0231093695
- Operating Temperature
- 55℃~+150℃
- Voltage
- 193V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 133V
- 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.
SMAJ120CA 产品概述
一、产品简介
SMAJ120CA 是 DOWO（东沃）出品的双向瞬态电压抑制二极管（TVS），封装为 SMA（DO-214AC）。器件设计用于吸收脉冲浪涌能量，保护敏感电子电路免受雷击、开关瞬态及电感回路释放能量的损害。该型号在 10/1000µs 波形下可承受高达 400W 的峰值脉冲功率，适用于要求稳定可靠浪涌保护的中高电压场合。
二、主要电气参数与意义
- 极性：双向（适合交流或双极性脉冲保护）
- 反向截止电压 Vrwm：120V（表示最大持续工作电压，应高于正常线路电压）
- 击穿电压 Vbr：133V（器件进入导通的起始电压区间）
- 钳位电压：193V（在额定峰值脉冲电流下的最大夹断电压，决定被保护器件承受的最大电压幅值）
- 峰值脉冲电流 Ipp：2.07A（对应 Ppp=400W@10/1000µs）
- 峰值脉冲功率 Ppp：400W（10/1000µs 标准波形）
- 反向电流 Ir：1µA（在 Vrwm 下的泄漏电流，表明静态功耗和漏电小）
- 工作温度范围：-55℃ ~ +150℃
三、典型应用场景
适用于串联电源总线、通信接口、工业控制设备、逆变器辅助电路、测控仪表和汽车非关键回路等需要对高能脉冲进行双向保护的场合。特别适合在 120V 等级附近的直流系统或需双向抑制的交流线路。
四、使用与选型建议
- 确认 Vrwm 高于线路正常工作电压且留有裕量；若长期工作电压接近 120V，应考虑更高 Vrwm 的器件以减少误触发风险。
- 参考钳位电压 193V 来评估被保护器件能否承受瞬态尖峰；若下游器件耐压较低，应增加级联保护或选择钳位更低的方案。
- 布局上应尽量缩短 TVS 与被保护节点之间的接线长度，减小寄生电感，提高吸收效率。
- 双向器件无需极性区分，适合交流与双向脉冲场合。
五、封装与可靠性
SMA（DO-214AC）封装便于自动贴片和手工焊接，机械强度和散热性能良好。器件工作温度宽泛（-55℃~+150℃），符合工业级应用环境要求。具体焊接温度及可靠性测试数据请参阅厂家完整技术资料与 IPC 推荐工艺。
六、注意事项
在并联使用或多次遭受大脉冲后应检查器件是否有损伤迹象。对于关键系统建议按规格留有安全裕度并结合熔断器、限流器等保护元件构成综合保护方案。采购时确认批次和原厂参数一致，以保证长期稳定性。
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.
