WMSIC Electronic Components

ST STTH3R02QRL

ModelSTTH3R02QRL
PackageDO-15
BrandST
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

20 specifications

Core information

Product name
ST(STMicroelectronics) STTH3R02QRL
Type
ST
Unit
Electronic Component
Minimum package
6000

Technical parameters

Electronic Component
Electronic Component
Electronic Component
ST(STMicroelectronics)
Electronic Component
STTH3R02QRL
Electronic Component
1
Package
DO-15
Electronic Component
Fast Recovery / High-Efficiency Diode
Electronic Component
0.532g
Electronic Component
1
Electronic Component
BM0265806335
Current
3A
Diode
1
Current(Ir)
3uA@200V
(Vf)
1.2V@9A
Electronic Component
6000
Voltage Rating(Vr)
200V
(Trr)
24ns

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

ST意法半导体STTH3R02QRL快恢复二极管产品概述

一、产品定位与核心优势

STTH3R02QRL是ST意法半导体推出的独立式快恢复/高效率二极管,专为中小功率高频开关应用设计,核心聚焦「低导通损耗+快速开关响应」两大关键需求,适配对效率、可靠性要求较高的电子电路场景。其核心特性可总结为:200V直流反向耐压、3A连续整流电流、1.2V@9A低正向压降、24ns超短反向恢复时间,兼顾了耐压、电流承载能力与开关效率,是传统硅整流二极管的升级替代方案。

二、关键参数深度解析

1. 正向导通特性:低损耗适配大负载

该二极管正向压降仅1.2V(测试条件:9A正向电流),相比传统硅整流二极管(如1N4007在1A下Vf≈0.7V,但电流升至9A时Vf会超过1.5V),在大电流工况下仍能保持低导通损耗,可有效降低电路整体功耗,提升能源转换效率。同时,3A连续整流电流(直流) 满足中小功率设备的持续负载需求(如小功率开关电源、LED驱动阵列)。

2. 反向阻断特性:低漏电流保障可靠性

  • 直流反向耐压(Vr)达200V,可稳定阻断200V以下的反向电压,适配市电整流(如110V/220V输入的次级电路)等低压应用场景;
  • 反向电流(Ir)仅3μA(测试条件:200V反向电压),漏电流极小,减少反向待机损耗,同时避免因漏电流过大导致的器件发热问题,延长使用寿命。

3. 开关响应特性:24ns快恢复适配高频

反向恢复时间(Trr)为24ns,属于超快恢复二极管范畴(普通整流二极管Trr通常为μs级,快恢复多为ns级)。短恢复时间可显著降低开关过程中的反向恢复损耗,减少EMI(电磁干扰),尤其适合开关频率在几十kHz至几百kHz的高频电路(如开关电源、逆变器)。

4. 浪涌耐受能力:抗冲击适配瞬态工况

非重复峰值浪涌电流(Ifsm)达75A(10ms脉冲),可承受电路启动或负载突变时的瞬时大电流冲击,提升器件在复杂工况下的可靠性,避免因浪涌损坏(如开关电源开机瞬间的电流峰值)。

三、封装与典型应用场景

1. DO-15封装:传统可靠易安装

采用DO-15轴向引线封装,属于通孔安装型封装,具有以下优势:

  • 机械强度高,耐温性好(符合工业级温度范围要求);
  • 安装便捷,无需特殊焊接工艺,适配传统PCB设计,适合批量生产;
  • 尺寸紧凑,节省电路板空间。

2. 典型应用领域

  • 开关电源(AC-DC/DC-DC):次级整流、续流电路,利用快恢复特性减少开关损耗,提升转换效率(如手机充电器、笔记本电源的次级整流);
  • 不间断电源(UPS):小功率UPS的整流/逆变电路,低Vf降低待机功耗,200V耐压满足输入电压波动;
  • LED驱动电源:恒流/恒压驱动的整流环节,低损耗提升LED光效,同时满足小功率LED阵列的电流需求;
  • 电机驱动(小功率):直流电机的续流二极管,快恢复特性减少电机换向时的电磁干扰;
  • 逆变器:小型光伏逆变器的高频整流电路,适配几十kHz的开关频率,保障转换效率。

四、品牌与可靠性保障

ST意法半导体作为全球知名半导体厂商,STTH3R02QRL遵循严格的生产工艺与质量管控:

  • 参数一致性好,批次间差异小,适合批量应用;
  • 符合RoHS环保标准,无有害物质;
  • 经过多项可靠性测试(如温度循环、湿度老化),可满足工业级、消费级电子设备的长期稳定运行要求。

五、选型参考要点

若需选择替代或匹配器件,需关注以下核心指标:

  1. 反向耐压是否匹配电路工作电压(如200V以内场景);
  2. 连续整流电流是否覆盖负载峰值(3A以内需求);
  3. 反向恢复时间是否适配开关频率(高频应用需Trr<50ns);
  4. 正向压降是否满足效率要求(低损耗优先)。

总结:STTH3R02QRL凭借「低Vf+快恢复+合适的耐压电流」组合,成为中小功率高频电路的高性价比选择,尤其适合对效率、可靠性要求较高的开关电源、LED驱动等场景。

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