WMSIC Electronic Components

LRC HFMB205

ModelHFMB205
PackageSMB
BrandLRC
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 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
LRC HFMB205
Type
LRC
Minimum package
3500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
LRC
Electronic Component
HFMB205
Electronic Component
1
Package
SMB
Electronic Component
General Purpose Diode
Electronic Component
0.223g
Electronic Component
1
Electronic Component
BM0264743577
Current
2A
Diode
1
Current(Ir)
5uA
(Vf)
1.3V
Electronic Component
50℃~+150℃
Electronic Component
Electronic Component
Electronic Component
3500

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

HFMB205通用整流二极管产品概述

HFMB205是乐山无线电(LRC)推出的一款通用贴片整流二极管,采用SMB(DO-214AA)封装,凭借均衡的电气参数与宽环境适应性,广泛应用于中小功率电源整流、工业控制及消费电子领域。

一、产品基本定位与封装特性

HFMB205定位于常规整流需求场景,替代传统直插整流二极管(如1N5404),适配贴片自动化生产。其SMB封装具有以下特点:

  • 尺寸紧凑:典型尺寸为2.9mm(长)×3.8mm(宽)×1.6mm(高),比直插TO-220封装小60%以上,支持高密度PCB布局;
  • 贴装便捷:符合SMT标准,可通过回流焊/波峰焊实现批量贴装,生产效率高;
  • 热兼容性:封装设计兼顾散热与小型化,适合中小功率持续工作场景。

二、核心电气参数解析

HFMB205的关键参数覆盖了常规整流的核心需求,各参数意义及应用注意事项如下:

1. 正向压降(Vf=1.3V)

在2A直流电流下的正向导通电压为1.3V,属于硅基整流二极管的典型值(高于快恢复二极管,但优于肖特基的反向耐压)。需注意:持续工作时功耗P=I×Vf,2A电流下功耗约2.6W,设计时需通过PCB铜箔散热(建议散热焊盘面积≥10mm²),避免结温过高。

2. 直流反向耐压(Vr=400V)

最大可承受400V直流反向电压(未击穿),覆盖了大多数中小功率电源的反向电压需求(如12V/24V输出电源的次级反向电压通常≤100V,余量充足)。应用中需避免反向电压超过400V,否则可能导致器件击穿失效。

3. 整流电流(If=2A)

额定直流整流电流为2A,是持续工作的最大允许电流(环境温度25℃时)。若环境温度升高,需降额使用(如100℃时降额至1.5A左右),确保结温不超过额定值。

4. 反向漏电流(Ir=5uA)

反向电压400V时的漏电流仅5uA,属于低漏电流设计,可降低反向损耗,适合对电源效率要求较高的场景(如精密仪器电源)。

5. 非重复峰值浪涌电流(Ifsm=50A)

单次(非重复)可承受50A浪涌电流(持续时间8.3ms,半波脉冲),能有效应对开机瞬间浪涌、负载突变等异常电流,提升系统可靠性。

6. 工作结温范围(-50℃~+150℃)

宽温范围覆盖了工业、车载等恶劣环境:

  • 低温场景:-50℃时仍能保持稳定的电气特性,适合北方户外设备、低温存储设备;
  • 高温场景:+150℃为最大允许结温,需通过散热设计控制实际结温(如环境温度85℃时,结温需≤150℃,则允许功耗≤(150-85)/Rth,Rth典型值为50℃/W)。

三、典型应用场景

HFMB205的参数特性使其适用于以下常见场景:

  1. 中小功率开关电源:如5-20W适配器、LED驱动电源的次级整流;
  2. 工业控制电路:PLC、传感器模块的辅助电源整流,宽温特性适配车间高温/低温环境;
  3. 消费电子:豆浆机、加湿器、机顶盒等小家电的电源整流,成本优势明显;
  4. 车载辅助电源:12V车载充电器、车载音响的整流电路(部分批次支持AEC-Q101车载级标准);
  5. 通信设备:路由器、交换机的小功率电源整流,低漏电流提升电源效率。

四、LRC品牌与品质保障

乐山无线电(LRC)是国内分立器件领域的老牌厂商,HFMB205属于其成熟量产产品线,具备以下优势:

  • 批量一致性:采用先进的芯片制造工艺,参数离散性小(Vf偏差≤0.1V,Ir偏差≤1uA),适合批量生产;
  • 环保认证:符合RoHS 2.0、REACH等环保标准,无铅封装;
  • 供应稳定:年产能充足,交货周期短,适合长期合作;
  • 售后支持:提供技术咨询、样品测试等服务,解决应用中的问题。

五、应用设计注意事项

  1. 散热设计:2A工作时需确保PCB散热焊盘面积≥10mm²,或增加散热片(如环境温度≥60℃);
  2. 电压降额:反向电压建议不超过320V(80%降额),避免击穿风险;
  3. 浪涌防护:若系统浪涌频繁,可并联TVS二极管进一步防护;
  4. 温度降额:环境温度每升高1℃,最大允许电流降额约0.4%(25℃时2A,100℃时约1.5A)。

以上概述涵盖了HFMB205的核心特性与应用要点,可作为选型、设计的参考依据。

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