WMSIC Electronic Components

FOSAN SS34B

ModelSS34B
PackageSMB
BrandFOSAN
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
FOSAN SS34B
Type
FOSAN
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
FOSAN
Electronic Component
SS34B
Electronic Component
1
Package
SMB
Electronic Component
Schottky Diode
Electronic Component
0.184g
Electronic Component
1
Electronic Component
BM0264881636
Current
3A
Diode
1
Current(Ir)
100uA@40V
(Vf)
550mV@3A
Electronic Component
65℃~+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.

SS34B肖特基二极管产品概述

一、产品定位与核心价值

SS34B是FOSAN(富信)半导体推出的低压大电流肖特基整流二极管,针对对效率、小型化有明确要求的电源及控制电路设计,核心价值在于通过低正向压降、高电流密度与宽温可靠性,平衡性能与成本,满足消费电子、工业控制等领域的主流应用需求。不同于传统硅整流二极管,肖特基结构赋予其“快速恢复+低导通损耗”的双重优势,是替代普通整流管升级效率的优选器件。

二、关键电气参数深度解析

SS34B的参数设计精准匹配低压应用场景,核心参数及实际意义如下:

  1. 正向压降(Vf):550mV@3A
    这是肖特基二极管的核心优势——远低于同电流等级硅整流管(典型1.0~1.2V@3A),导通时损耗公式为(P=I×Vf),3A电流下损耗仅1.65W,比硅管减少约45%发热,直接提升电源转换效率。
  2. 直流反向耐压(Vr):40V
    满足12V/24V等低压系统的反向耐压需求,留有一定余量(远高于常规低压电源的反向峰值电压),避免过压击穿风险。
  3. 整流电流(If):3A
    持续工作电流能力,支持常规消费电子(如2A充电器)及小型工业设备的满载需求,短期脉冲电流(如开关电源尖峰)可承受更高值(行业肖特基典型脉冲电流为10A@10ms)。
  4. 反向漏电流(Ir):100μA@40V
    反向截止时漏电流极小,减少反向损耗,且参数一致性好,批量应用中无需担心漏电流过大导致的效率下降或发热问题。
  5. 工作结温范围:-65℃~+150℃
    覆盖工业级温宽,可在极端环境(如车载低温、家电高温环境)下稳定工作,结温波动时参数漂移极小,可靠性更高。

三、封装设计与可靠性表现

SS34B采用SMB(DO-214AA)表面贴装封装,兼顾小型化与可靠性:

  • 尺寸紧凑:标准SMB封装尺寸约3.5mm(长)×2.5mm(宽)×1.5mm(高),适合高密度PCB设计(如手机充电器、移动电源的小型化模块);
  • 焊接可靠性:引脚设计符合IPC标准,可兼容回流焊、波峰焊工艺,焊接强度满足工业级振动测试要求;
  • 散热性能:封装材料导热系数合理,配合PCB铜箔可有效散发布尔3A电流产生的热量,避免局部过热;
  • 环境适应性:符合RoHS无铅环保要求,可通过湿热循环、温度冲击等可靠性测试(如-55℃~+150℃循环1000次后参数无明显变化)。

四、典型应用场景

SS34B的参数特性使其在多个领域广泛应用:

  1. 开关电源(AC-DC转换):次级整流环节替代普通硅管,低VF提升转换效率(如5V/2A充电器效率可从85%提升至88%以上);
  2. DC-DC转换器:升压/降压电路的续流二极管,肖特基快速恢复特性(典型恢复时间<100ns)可减少开关损耗,提升动态响应;
  3. 消费电子:手机充电器、移动电源、蓝牙耳机充电盒的整流/续流,满足小型化与效率需求;
  4. 小型家电:电磁炉、电饭煲、加湿器的电源模块,宽温范围适应家电内部高温环境;
  5. 工业控制:低电压信号整流、PLC模块的续流电路,宽温与低漏电流保证工业环境下的稳定性。

五、品牌与质量保障

FOSAN(富信)作为国内功率器件领域的成熟厂商,SS34B的质量保障体系包括:

  • 生产工艺:采用先进的肖特基势垒制造工艺,确保参数一致性(批量产品Vf波动<50mV);
  • 可靠性测试:每批次产品经过反向耐压、正向压降、漏电流全检,以及温度循环、焊接可靠性等抽样测试;
  • 环保合规:符合RoHS 2.0、REACH等环保标准,无铅封装适配现代电子制造要求;
  • 供货支持:常备库存充足,可满足中小批量及量产需求,交货周期稳定。

SS34B凭借低损耗、高可靠性与小型化设计,成为低压电源领域的高性价比选择,适配从消费电子到工业控制的多元应用场景。

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