Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
BORN SMAJ28A
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN SMAJ28A
- Type
- BORN
- Minimum package
- 5000
Technical parameters
- Electronic Component
- BORN
- Electronic Component
- SMAJ28A
- Electronic Component
- 1
- Package
- SMA(DO-214AC)
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.108g
- Electronic Component
- 1
- Channel Count
- Electronic Component
- Electronic Component
- BM0227656416
- Voltage
- 45.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 31.1V
- Electronic Component
- 5000
- Current(Ipp)
- 8.8A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMAJ28A 产品概述
一、产品简介
SMAJ28A 是 BORN（伯恩半导体）出品的一款单路、单向瞬态电压抑制（TVS）二极管，采用 SMA（DO-214AC）封装，专为保护24V等级的电源轨和信号线免受瞬态过电压（如浪涌、静电放电、雷击反向脉冲）损害而设计。器件结构紧凑，响应速度快，适合工业、电源、通信和车载等领域的浪涌保护需求。
二、主要电气参数
- 反向截止电压（Vrwm）：28V（反向工作电压，设备在此电压下可长期工作）
- 击穿电压（Vbr）：31.1V（典型值，开始导通以吸收过压能量）
- 钳位电压（Vc）：45.4V（在峰值脉冲条件下限制电压至此值附近）
- 峰值脉冲电流（Ipp）：8.8A（器件能承受的瞬态峰值电流，具体测试波形请参见数据手册）
- 反向电流（Ir）：约1 μA（在 Vrwm 条件下的漏电流水平）
- 通道数：单路，极性：单向
三、工作原理与特性亮点
SMAJ28A 在正常工作电压下呈高阻状态，只有很小的反向漏电流；当遭遇超过击穿电压的瞬态过电压时，器件快速进入导通状态，将多余能量钳位并导流到地，从而保护下游电路。其钳位电压与较高的峰值脉冲电流匹配，使得在8.8A级冲击下仍能将电压控制在约45.4V，降低被保护器件承受的应力。
四、典型应用场景
- 24V/28V 工业电源与控制系统的输入保护
- 汽车电源线、车载电子模块的浪涌抑制（非直接替代专用汽车级器件时请核对温度与认证）
- 通信设备、电源适配器与逆变器的输出/输入端保护
- I/O 接口、传感器线路与继电器驱动电路的防护
五、封装与安装建议
SMA（DO-214AC）封装便于自动贴装与回流焊接。为发挥最佳保护效果，建议将 TVS 器件尽可能靠近被保护的接口或电路板边缘，尽量缩短连接导线和走线长度，增大地线截面积以降低回路感抗。注意焊接温度与时间符合器件工艺规范以避免热损伤。
六、选型与使用注意
- 确认系统工作电压低于 Vrwm（28V），留有一定的安全裕度；若系统中存在瞬态高压，请核对钳位能否承受下游器件。
- 峰值脉冲电流8.8A为器件在规定测试条件下的能力，实际应用中需结合脉冲能量（如10/1000 μs 或 8/20 μs 波形）判断是否满足要求。
- 对于连续高能量或频繁浪涌场景，应选用更高能量能力的器件或并联/级联保护方案。
- 在高温或严格汽车标准应用中，请参考厂商完整数据手册与可靠性报告。
SMAJ28A 以其适中的 Vrwm 与钳位特性，适合常见的24V级浪涌保护场合。详细的测试条件、极限参数与特性曲线请以 BORN 官方数据手册为准，选型时可与具体应用环境参数对照确认。
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.
