Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
TWGMC SMF17A TVS Diode SMF17A
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TWGMC SMF17A
- Type
- TWGMC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TWGMC
- Electronic Component
- SMF17A
- Electronic Component
- 1
- Package
- SOD-123FL
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.048g
- Electronic Component
- 1
- Channel Count
- Electronic Component
- Electronic Component
- BM0227688447
- Operating Temperature
- 55℃~+150℃
- Voltage
- 27.6V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 20.9V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMF17A 产品概述
一、产品简介
SMF17A 为单路、单向瞬态电压抑制二极管（TVS），由 TWGMC（台湾迪嘉）生产，封装为 SOD-123FL。该器件专为快速吸收瞬态过电压与浪涌脉冲设计，在车辆电源、工业控制与通信接口等场合能有效保护下游电子元件免受电气瞬变损伤。
二、主要电气参数
- 类型：TVS，单路、单向
- 反向工作电压 Vrwm：17 V
- 击穿电压 Vbr：约 20.9 V
- 钳位电压 Vc：约 27.6 V（在峰值脉冲条件下）
- 峰值脉冲功率 Ppp：200 W（波形 10/1000 μs）
- 峰值脉冲电流 Ipp：7.2 A
- 反向漏电流 Ir：典型 1 μA（在常温 Vrwm 下）
- 工作温度范围：-55 ℃ ~ +150 ℃
以上参数表明 SMF17A 在承受高能瞬态脉冲时具备较高的钳位能力和能量吸收能力，适合12V/24V类动力与信号线路的浪涌防护。
三、封装与可靠性
SMF17A 采用 SOD-123FL 小型封装，体积小、散热路径短，便于自动贴装和高密度 PCB 设计。器件额定的工作温度范围宽（-55℃～+150℃），适用于汽车级与工业级环境，但在实际应用中应注意焊接温度和热循环对可靠性的影响。
四、典型应用场景
- 汽车电源与车载电子（对 12V/24V 电源总线的瞬变保护）
- 工业控制系统电源输入与继电器驱动电路
- 通信接口、串口、CAN 总线及其他 I/O 端口的过压保护
- 电源适配器与充电设备防雷击/浪涌抑制
五、选型与使用建议
- 若被保护线路的最大工作电压接近或低于 17 V，则 SMF17A 可作为合适的钳位器件；对更高母线电压应选择额定 Vrwm 更高的型号。
- 布局时尽量将 TVS 置于受保护端口与大电流/高阻抗电路之间，靠近接口且走线最短，以降低线感应产生的额外过压。
- 焊接时遵循 SOD-123FL 的推荐回流温度曲线，避免过热以防影响封装应力与长期可靠性。
- 对于连续或频繁的高能量冲击，应评估器件的能量吸收极限与退化情况，必要时并联或选用能量等级更高的保护方案。
六、器件选用与替代
SMF17A 适合一般浪涌抑制场合，若需要更低钳位或更高脉冲承受功率，可考虑相邻功率等级或采用双管并联设计。选型时应同时比较 Vrwm、Vbr、Vc（钳位）与峰值脉冲功率 Ppp，以满足系统的极限电压与能量要求。
七、结论
SMF17A 凭借 200 W（10/1000 μs）能量吸收能力、27.6 V 的典型钳位电压以及宽工作温度范围，适用于汽车与工业领域的瞬态过压防护。在 PCB 布局、焊接工艺与应用场景匹配上给予适当注意，可为关键电路提供可靠的浪涌保护。若需更详细的电气特性曲线与测试条件，建议查阅厂商 Datasheet 或联系 TWGMC 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.
