WMSIC Electronic Components

CJ RS4MBF

ModelRS4MBF
PackageSMBF
BrandCJ
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
CJ RS4MBF
Type
CJ
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
CJ
Electronic Component
RS4MBF
Electronic Component
1
Package
SMBF
Electronic Component
Fast Recovery / High-Efficiency Diode
Electronic Component
0.094g
Electronic Component
1
Electronic Component
BM0230029833
Current
4A
Diode
1
Current(Ir)
5uA@1000V
(Vf)
1.3V@4A
Electronic Component
55℃~+150℃
Electronic Component
Electronic Component
Electronic Component
5000

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

RS4MBF — 1kV 500ns 4A 快恢复/高效率二极管产品概述

一、产品简介

RS4MBF 是 CJ(江苏长电/长晶)推出的一款高电压、快恢复功率二极管,额定反向耐压为 1kV,整流电流 4A,专为高电压整流和中等频率开关应用设计。器件采用 SMBF 表面贴装功率封装,兼顾热性能与安装便捷性,适合开关电源、功率因数校正(PFC)、逆变器和电机驱动等场景。

二、主要电气参数(典型)

  • 正向压降 Vf:1.3V @ If = 4A
  • 直流反向耐压 Vr:1000V
  • 连续整流电流 If(AV):4A
  • 反向电流 Ir:5µA @ Vr = 1000V
  • 反向恢复时间 Trr:500ns(典型)
  • 非重复峰值浪涌电流 Ifsm:120A
  • 工作结温范围:-55℃ ~ +150℃

三、特点与优势

  • 高耐压:1kV 等级可满足高压整流与电网侧电路要求。
  • 快恢复特性:Trr ≈ 500ns,在开关频率较高的电源中能降低开关损耗与电磁干扰(EMI)相比普通慢恢复二极管显著改善。
  • 低反向泄漏:5µA@1000V 有利于降低高压下的静态功耗与温漂问题。
  • 良好浪涌承受力:120A 峰值浪涌电流适应开机或短时冲击负载场景。
  • SMBF 封装:便于表面贴装生产,热阻适中,利于散热设计。

四、典型应用

  • 开关电源(SMPS)高压整流与续流回路
  • 功率因数校正(PFC)二极管(开关频率需考虑 Trr)
  • 逆变器与变频器的高压整流/续流保护
  • 电机驱动、太阳能逆变器、LED 驱动等高压功率电路

五、封装与热管理建议

  • 封装:SMBF 表面贴装,推荐按厂方推荐的 PCB 焊盘及回流工艺焊接。
  • 散热:虽然 SMBF 有一定的散热能力,但在持续 4A 工作或高温环境下建议采用加大铜箔、过孔通热或与散热底板配合使用,必要时做热仿真与实际测温验证。
  • 结温与降额:在高结温下器件参数(如 Ir、Vf)会上升,建议按系统最大结温进行电流降额,并留有安全裕度。

六、使用注意事项

  • 开关频率适配:500ns 的 Trr 属于快恢复等级,但与超快恢复或肖特基相比仍有较大反向恢复电流,设计时需评估开关损耗与 EMI,必要时加入缓冲电阻、RC 阻尼或吸收电路。
  • 浪涌保护:Ifsm 为峰值短时能力,长期或重复冲击可能影响寿命,需配合浪涌限制或熔断保护。
  • 焊接工艺:遵循厂方回流温度曲线,避免超温或长时间高温暴露导致可靠性下降。
  • 储存与防护:高电压器件应避免潮湿和污染物附着,出厂后保持防潮包装,回流前请按要求烘烤。

七、替代与对比建议

  • 若需要更低正向压降或更高开关频率,可考虑高压肖特基二极管(Vf 更低、Trr 更短),但需权衡价格与反向耐压限制。
  • 若系统对反向恢复能量承受能力要求较低,可选择超快恢复(UF)或软恢复器件以降低 EMI。

总体而言,RS4MBF 以 1kV 高耐压、500ns 快恢复与 4A 持续电流的组合,适合各类中频高压整流与续流应用,在成本、可靠性与性能间具有良好平衡。设计时请结合实际工作频率与热条件作充分验证。

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