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BORN SMFJ28CA
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- BORN SMFJ28CA
- Type
- BORN
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- BORN
- Electronic Component
- SMFJ28CA
- Electronic Component
- 1
- Package
- SOD-123F
- Electronic Component
- Electronic Component
- Type
- TVS
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.04g
- Electronic Component
- 1
- Electronic Component
- BM0227161504
- Voltage
- 45.4V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 31.1V
- Electronic Component
- Electronic Component
- Electronic Component
- 3000
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMFJ28CA 产品概述
一、产品简介
SMFJ28CA 是 BORN（伯恩半导体）推出的一款双向瞬态电压抑制二极管（TVS），封装为 SOD-123F，专为瞬态过压和浪涌能量吸收设计。器件在工作电压附近具有快速响应和低钳位电压的特性，适用于要求可靠过压保护的中低压电源和接口线路。
二、主要电气参数
- 极性：双向（Bidirectional），对称钳位，适合双向或交替极性浪涌。
- 反向截止电压 Vrwm：28 V（典型用于保护 24V 级系统）。
- 击穿电压 Vbr：31.1 V（器件进入雪崩导通区的起始电压）。
- 钳位电压 Vc：45.4 V @ Ipp = 4.4 A（在峰值脉冲电流下的最大钳位）。
- 峰值脉冲电流 Ipp：4.4 A（对应 Ppp 及测量条件）。
- 峰值脉冲功率 Ppp：200 W（按行业常用的 10/1000 µs 脉冲波形测得）。
- 反向漏电流 Ir：1 µA（在 Vrwm 条件下的漏电控制良好）。
三、工作原理要点
作为双向 TVS，SMFJ28CA 在正向和反向过压时均可迅速进入低阻导通状态，将瞬态能量钳位在安全电平并导入地或回路，保护被保护元件不受高压损伤。器件响应时间极短，适合抑制雷击、开关换向、电磁脉冲等瞬态事件。
四、典型应用场景
- 工业 24V 控制电源、继电器驱动电路的浪涌保护。
- 通信设备、远程终端（RTU）、楼宇自动化等需要抑制浪涌的电源接口。
- 双向或交流接口的过压保护，例如隔离变换器输入、双向信号线的父级防护。
- 辅助保护级与一级限流器（如熔断器、限流电阻）配合使用，提高系统抗浪涌能力。
五、封装与安装注意
SOD-123F 封装体积小、散热通道有限，建议布板时将 TVS 尽量靠近被保护端子放置，走短宽接地回路以降低寄生电感。由于为双向器件，无极性方向标记对系电路影响小，但需注意与周边元件的热耦合和焊接可靠性。建议遵循制造商的回流焊工艺曲线进行焊接，避免超过最高温度或长时间热暴露。
六、使用建议与可靠性
- 对于高能量冲击场合，建议在 TVS 前级增加熔断器或限流器件，实现能量分担与保护自恢复能力。
- 钳位电压在指定脉冲电流下为 45.4 V，系统设计时需保证此钳位对下游器件为可承受范围。
- 长期工作环境若有高温或频繁冲击，应评估器件热循环与老化，必要时加大余量或并联多只 TVS 以分散能量。
- 出于可靠性验证，请参考 BORN 提供的完整数据手册进行过压、瞬态和温度应力测试。
七、总结
SMFJ28CA 综合了 28 V 工作电压、200 W 脉冲功率和双向抑制特性，适合对中低压电源与双向接口进行高效瞬态保护。在 PCB 布局与散热管理到位、配合限流器或保险元件时，能为工业与通信类系统提供稳健可靠的防护能力。欲获取完整典型曲线与封装尺寸，请参考 BORN 官方数据手册。
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