Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
TWGMC SMF40CA Bidirectional TVS Diode SMF40CA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TWGMC SMF40CA
- Type
- TWGMC
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TWGMC
- Electronic Component
- SMF40CA
- Electronic Component
- 1
- Package
- SOD-123FL
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.04g
- Electronic Component
- 1
- Channel Count
- Electronic Component
- Electronic Component
- BM0225962826
- Operating Temperature
- 55℃~+150℃
- Voltage
- 64.5V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 49.1V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMF40CA 产品概述
一、产品简介
SMF40CA 是台湾迪嘉（TWGMC）出品的一款单路双向瞬态抑制二极管（TVS），采用 SOD-123FL 表面贴装封装。该器件专为保护电子线路免受瞬态过压、浪涌和静电放电（ESD）等冲击而设计，适用于需要较高稳态耐压和中等浪涌吸收能力的电源与信号保护场景。
二、关键参数
- 反向截止电压 Vrwm：40 V（稳态耐压）
- 击穿电压 Vbr：49.1 V（典型）
- 钳位电压 Vc（峰值）：64.5 V（在指定脉冲条件下）
- 峰值脉冲功率 Ppp：200 W @ 10/1000 µs
- 峰值脉冲电流 Ipp：3.1 A @ 10/1000 µs
- 反向漏电流 Ir：1 µA（常温下）
- 工作温度：-55 ℃ ~ +150 ℃
- 通道数：单路；极性：双向；封装：SOD-123FL
三、主要特性
- 双向保护：对正负向瞬态电压实现对称钳位，适合交流或可逆电压脉冲场合。
- 高钳位能力：在 10/1000 µs 脉冲下钳位电压为 64.5 V，可有效吸收中等幅值的浪涌能量。
- 低漏电流：1 µA 的反向电流有助于在待机或低功耗条件下保持系统稳定。
- 宽温度范围：-55 ℃ 至 +150 ℃，适应工业级或高温应用环境。
- 紧凑封装：SOD-123FL 封装便于表面贴装，利于高密度 PCB 布局。
四、典型应用
- 工业电源与控制模块的 24 V / 36 V 轨防护
- 通信设备、基站及网路设备的电源接口保护
- 仪器仪表、PLC、驱动器等抗浪涌设计
- 需要双向瞬态保护的信号线或电源回路
注：对于具体系统，应根据最高工作电压与器件 Vrwm 匹配，保证长期可靠性。
五、封装与布板建议
- 就近安装：将 SMF40CA 放置在受保护器件与外部线路（如电源插座、连接器）之间，靠近被保护端以降低环路电感。
- 短走线、宽铜箔：减小阻抗和热阻，提升浪涌能量承受能力。
- SMT 回流：SOD-123FL 兼容常规无铅回流工艺，遵循器件制造商的回流曲线与焊盘布局规范。
六、可靠性与使用注意
- 脉冲能力：Ppp 与 Ipp 基于 10/1000 µs 脉冲测量，连续多次大幅电脉冲会降低寿命，应做系统级余量设计。
- 工作电压匹配：Vrwm 为器件的稳态承受电压，工作母线电压应低于该值，避免长期临界应力。
- 环境因素：在高温、高湿或强腐蚀环境中，应考虑额外防护与老化测试。
七、选型建议与资料获取
SMF40CA 适合需要 40 V 级稳态耐压且要求双向保护的小型 SMT 应用。详细电气特性、封装尺寸、典型钳位曲线及回流焊工艺参数请参阅 TWGMC 官方数据手册或咨询授权分销商，以便做出匹配的可靠性和热设计。
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.
