WMSIC Electronic Components

Jingdao Microelectronics SS320B

ModelSS320B
PackageSMB(DO-214AA)
BrandElectronic
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
Electronic SS320B
Type
Jingdao Microelectronics
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
Electronic
Electronic Component
SS320B
Electronic Component
1
Package
SMB(DO-214AA)
Electronic Component
Schottky Diode
Electronic Component
0.21g
Electronic Component
1
Electronic Component
BM0264769477
Current
3A
Diode
1
Current(Ir)
300uA@200V
(Vf)
950mV@3A
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.

SS320B肖特基整流二极管产品概述

SS320B是晶导微电子推出的一款中功率肖特基势垒整流二极管,采用SMB(DO-214AA)贴片封装,针对低功耗、小型化电源设计需求优化,兼顾电气性能与可靠性,适用于多种工业及消费电子场景。

一、产品核心定位与设计思路

作为肖特基二极管家族的成员,SS320B的设计核心在于平衡正向压降与反向耐压:通过优化势垒层工艺,在200V反向耐压下实现950mV的低正向压降(@3A工作电流),相比同耐压等级的快恢复二极管,导通损耗降低约30%;同时支持3A连续整流电流与80A非重复浪涌电流,满足中小功率设备的瞬间冲击需求。

二、关键电气性能参数解析

1. 正向导通特性

SS320B的正向压降为950mV@3A,属于同功率肖特基二极管的优异水平:在3A连续工作电流下,单管导通损耗仅约2.85W(P=I×Vf),可有效减少电源系统的热损耗,降低散热设计成本。此外,正向压降随电流变化的斜率平缓,大电流下(如接近浪涌峰值)压降增量可控,避免局部过热。

2. 反向耐压与漏电流

反向耐压(Vr)为200V,覆盖多数AC-DC适配器、LED驱动电源的输出级反向电压需求;反向漏电流(Ir)仅300uA@200V,远低于普通整流管的漏电流水平,可减少待机功耗,提升电源效率。

3. 可靠性与环境适应性

  • 工作结温范围:-55℃~+150℃,符合工业级器件标准,可在极端温度环境(如户外电源、车载电子)中稳定工作;
  • 非重复峰值浪涌电流(Ifsm):80A(8.3ms半波),能承受电源启动瞬间或负载突变带来的大电流冲击,无需额外浪涌防护即可满足多数场景需求。

三、SMB封装的优势与可靠性设计

SS320B采用SMB(DO-214AA)贴片封装,具有以下特点:

  1. 小型化集成:封装尺寸约3.5×2.5×1.5mm,适合路由器、机顶盒等小型电子设备的高密度PCB布局;
  2. 散热优化:封装采用高导热环氧塑封料,内部引线键合工艺提升热传导效率,可快速将结温传递至PCB,降低热阻;
  3. 机械可靠性:引脚采用镀锡工艺,焊接兼容性好,且封装强度高,可承受振动、冲击等机械应力,符合IEC 60068-2标准。

四、典型应用场景

1. 开关电源次级整流

适用于12V48V输出的中小功率开关电源(如笔记本适配器、LED球泡灯驱动),肖特基二极管的快速恢复特性(无反向恢复时间)可减少开关损耗,提升电源效率(通常可使效率提升1.5%2.5%)。

2. 低压直流电路续流

在DC-DC转换器(如Buck/Boost电路)、电机驱动电路中,SS320B可作为续流二极管,低正向压降减少续流损耗,同时高浪涌能力可应对电机启动时的瞬间电流冲击。

3. 工业控制与车载电子

宽结温范围与200V反向耐压,使其可用于户外LED显示屏电源、车载充电器等场景,适应温度变化与电压波动。

4. 消费电子小功率模块

如智能音箱、路由器的电源模块,SMB封装节省PCB空间,同时低漏电流降低待机功耗,提升产品续航(若为电池供电设备)。

五、选型与使用注意事项

  1. 参数匹配:连续工作电流需控制在3A以内,反向电压峰值不超过200V(建议降额至150V以内,提升可靠性);
  2. 散热设计:大电流(>2A)工作时,需在PCB上增加铜箔面积(建议至少10mm²),或配合小型散热片,避免结温超过150℃;
  3. 焊接规范:SMB封装焊接温度需控制在260℃以内(回流焊),焊接时间不超过30秒,避免过温损坏器件;
  4. 浪涌防护:若应用场景中频繁出现大电流浪涌(如雷击环境),建议配合TVS二极管进行二次防护,延长器件寿命。

SS320B凭借低功耗、高可靠性与小型化封装,成为中小功率电源设计的优选器件,可满足多数消费电子与工业场景的整流需求。

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