WMSIC Electronic Components

DOWO RS1MA

ModelRS1MA
PackageSMA
BrandDOWO
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
DOWO RS1MA
Type
DOWO
Minimum package
5000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
DOWO
Electronic Component
RS1MA
Electronic Component
1
Package
SMA
Electronic Component
Fast Recovery / High-Efficiency Diode
Electronic Component
0.123g
Electronic Component
1
Electronic Component
BM0264356086
Current
1A
Diode
1
Current(Ir)
5uA
(Vf)
1.3V@1A
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.

RS1MA 产品概述

一、概述

RS1MA 是 DOWO(东沃)推出的一款高压快速整流二极管,单只独立封装(SMA),采用玻璃钝化结芯片设计,适合自动贴装与回流焊工艺。器件在高反向电压环境下表现稳定,兼顾快速开关特性与较低的反向电流,适合多种高压整流与开关电源应用。

二、主要电气参数

  • 二极管配置:1个独立式
  • 正向压降(Vf):1.3 V @ IF = 1 A
  • 直流反向耐压(Vr):1000 V
  • 正向整流电流(IF):1 A(直流)
  • 反向电流(IR):5 μA(在规定Vr与温度条件下)
  • 反向恢复时间(Trr):500 ns(快速恢复类)
  • 非重复峰值浪涌电流(Ifsm):30 A(浪涌脉冲条件,具体波形见厂家说明)
  • 工作结温范围:-55 ℃ ~ +150 ℃
  • RoHS 合规,无卤

三、产品特点

  • 玻璃钝化结芯片:提高结面稳定性与长期可靠性,减小热循环导致的参数漂移。
  • 高耐压:1 kV 反向耐压适合高压整流与高压回路保护。
  • 快速开关:Trr ≈ 500 ns,适用于中频开关电源及开关过渡回路,比普通慢恢复二极管响应更快,降低开关损耗。
  • 低反向泄漏:5 μA 的低反向电流有利于高阻抗回路与低空载损耗设计。
  • 适合自动贴装:SMA 封装兼容常见贴片机与回流焊流程,便于量产。

四、封装与贴装建议

  • 封装:SMA(表面贴装),小巧,节省PCB面积。
  • 散热:在 IF=1 A、Vf≈1.3 V 时器件耗散约 1.3 W,连续工作时需评估PCB铜箔散热能力并适当铺铜或加散热面,避免结温过高影响寿命与参数。
  • 贴装与焊接:兼容标准回流焊曲线,但建议遵循厂方推荐的温度曲线与预热/冷却速率,防止过热造成封装应力或封装材料损伤。
  • 座位与焊盘:为保证可靠焊接与散热,建议在焊盘设计中考虑较大焊盘面积及与散热层连通的通孔或大面积铜箔。

五、典型应用

  • 开关电源(SMPS)高压整流/续流二极管
  • 高压电源与充电设备整流桥元件
  • 逆变器、功率因数校正(PFC)电路的高压保护与整流
  • 保护电路(浪涌钳位、反向电压保护)
  • 工业控制与测试设备的高压整流场合

六、可靠性与环境

  • 工作温度范围宽(-55 ℃ 至 +150 ℃),适应苛刻环境。
  • 玻璃钝化工艺与 RoHS 无卤合规,提高环境适应性与长期稳定性。
  • 浪涌能力(Ifsm 30 A)适合短时故障或电源浪涌,但对长期冲击或重复高能量脉冲应采用适当保护与降额设计。

七、选型与使用建议

  • 若电路中存在较高开关频率或需更低恢复时间,可比较更低 Trr 的超快恢复或肖特基二极管,但肖特基在高压(1 kV)时较少见且正向压降可能更高/成本更高。
  • 在接近额定电流或高结温条件下应进行热仿真与实测,必要时增加PCB散热面或并联器件(需考虑不均流问题)。
  • 购买与备货时,请参考 DOWO 官方完整数据手册,确认测试条件(峰值电流脉冲形式、IR 测试温度等)以便与实际工况对比。

如需用于具体电路的热设计指导、PCB焊盘建议或与同类产品的对比选型,我可以根据您的应用场景给出更细致的建议。

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