WMSIC Electronic Components

MDD MB26S

ModelMB26S
PackageMBS
BrandMDD
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
MDD MB26S
Type
MDD
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
MDD
Electronic Component
MB26S
Electronic Component
1
Package
MBS
Type
Electronic Component
Electronic Component
Bridge Rectifier
Electronic Component
0.2g
Electronic Component
1
Electronic Component
BM0258755391
Current
2A
Current(Ir)
500uA@60V
(Vf)
700mV@2A
Electronic Component
55℃~+150℃
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.

MB26S 产品概述

一、产品简介

MB26S 是 MDD 品牌的一款单相整流桥(MBS 封装),额定直流整流电流为 2A,适用于中小功率交流到直流整流场合。该器件在 2A 工作电流下典型正向压降为 700mV,反向耐压 60V,非重复峰值浪涌电流可达 50A,工作结温范围为 -55℃ 至 +150℃,整体性能在效率、耐冲击和可靠性之间实现较好平衡,适合通用电源、适配器和工业控制等应用。

二、主要技术参数

  • 型号:MB26S(MDD)
  • 类型:单相整流桥(桥式整流器)
  • 正向压降:Vf = 700 mV @ If = 2 A(整流电流)
  • 额定直流整流电流:2 A
  • 直流反向耐压:Vr = 60 V
  • 反向电流:Ir = 500 μA @ Vr = 60 V
  • 非重复峰值浪涌电流:Ifsm = 50 A(通常按 8.3 ms 半正弦波)
  • 工作结温:-55℃ ~ +150℃
  • 封装:MBS(详见厂家机械图纸)

三、关键特性与优势

  • 低压降:在 2A 工作点上 0.7V 的正向压降可降低整流损耗,提升整机效率,适合对功耗敏感的设计。
  • 耐冲击能力强:50A 的单次浪涌电流能力能承受启动/充电等瞬态冲击,增强系统可靠性。
  • 宽温工作范围:-55℃ 至 +150℃ 的结温范围适应工业级环境,抗温漂能力强。
  • 充足的反向耐压:60V 反向耐压适合常见 12V/24V 交流侧整流应用,但不建议用于高压网或汽车高压场合。

四、典型应用场景

  • 开关电源次级整流、线性电源的桥式整流
  • 适配器与充电器(小功率)
  • 家电与照明驱动(12V/24V 系统)
  • 工业控制电源、仪器仪表供电
  • 电机驱动前端整流、辅助电源电路

五、封装与热管理

MB26S 的 MBS 封装为桥式整流常见外形,体积紧凑。典型应用中需注意:

  • 热耗散:在满载 2A 时,整流器上的功耗约 P = Vf × I ≈ 0.7V × 2A = 1.4W,需可靠散热路径。
  • PCB 散热:通过增大焊盘面积、增加铜厚或加散热片/散热铜柱可有效降低结温;工作在高温或频繁脉冲时应适当降额使用。
  • 机械尺寸与引脚布局请参照原厂数据表,确保安装牢固并满足电气间距要求。

六、使用注意事项

  • 反向电流随温度显著上升,若电路对漏电敏感(如高阻输入或电池供电),需考虑此项对待机功耗的影响。
  • 对于频繁的大幅浪涌(如直接连接大容性负载或电机起动),建议并联浪涌抑制器件或使用慢起动/限流措施,避免重复超出 Ifsm 额定值。
  • 在设计滤波电容时,需考虑充电电流导致的瞬态应力,电容 ESR 与充电路径会影响整流器峰值电流。
  • 长期可靠性:在高温环境下工作时应给予电器件足够的降额余量(电流或功耗),延长器件寿命。

七、典型电路与计算示例

  • 桥式整流后接滤波电容的输出直流峰值近似为 Vout ≈ √2 × Vac(rms) − 2 × Vf。
    例如 12VAC RMS 输入:Vpeak ≈ 16.97V,扣除桥臂压降 2 × 0.7V ≈ 1.4V,滤波后静态空载时约 15.6V。
  • 若整流器在 2A 下连续工作,注意 PCB 温升和附近器件的热耦合;建议在设计阶段做热仿真或按经验留足散热面积。

八、选型建议与替代方案

  • 若系统电压或浪涌要求更高,可选择更高 Vr 或更大 Ifsm 的桥式整流器;若需要更低 Vf 以降低损耗,可考虑肖特基(Schottky)桥堆,但需权衡反向耐压与漏电流。
  • 在对漏电流要求严格的低功耗场景,参考低 Ir 规格的型号或在待机状态下断开整流回路。

结语:MB26S 以其 2A 的整流能力、0.7V 的典型正向压降和良好的浪涌承受力,是通用中小功率整流应用的可靠选择。最终应用前请务必参照 MDD 官方数据手册确认机械尺寸、典型特性曲线及具体使用限制。

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