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ST STPS140AY
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ST(STMicroelectronics) STPS140AY
- Type
- ST
- Minimum package
- 5000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ST(STMicroelectronics)
- Electronic Component
- STPS140AY
- Electronic Component
- 1
- Package
- DO-214AC
- Electronic Component
- Schottky Diode
- Electronic Component
- 0.5g
- Electronic Component
- 1
- Electronic Component
- BM0230028524
- Current
- 1A
- Diode
- 1
- Current(Ir)
- 12uA@40V
- (Vf)
- 650mV@2A
- Electronic Component
- 40℃~+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.
STPS140AY 产品概述
一、概述
STPS140AY 是意法半导体（ST）推出的一款肖特基整流二极管，封装为 DO-214AC（SMA），适合中低压、高频整流和瞬态吸收场合。器件典型参数包括正向压降 Vf = 650 mV（在 If = 2 A 时），直流反向耐压 Vr = 40 V，额定整流电流 1 A，40 V 时反向漏电流 Ir = 12 μA，非重复峰值浪涌电流 Ifsm = 60 A，工作结温范围 -40 ℃ 至 +150 ℃。
二、主要特点
- 低正向压降（650 mV @ 2 A），减少导通损耗，提升效率；
- 肖特基结构带来快速恢复特性，适应高开关频率的开关电源和降压转换器；
- 反向漏电较小（12 μA @40 V），利于低静态功耗应用；
- 高脉冲浪涌能力（60 A 非重复峰值），能承受启动或短时冲击电流；
- DO-214AC（SMA）表贴封装，适合自动贴装和回流焊工艺。
三、典型应用场景
- 开关电源输出整流（尤其在低压大电流区）；
- DC-DC 降压模块和同步整流替代；
- 反向电压保护与输入整流；
- 续流（二极管自由放电）和功率因数校正电路的轻负荷整流；
- 电子设备的浪涌抑制与瞬态保护场合。
四、设计和布局建议
- 由于 DO-214AC 为贴片封装，建议在 PCB 上为器件引脚和散热焊盘预留足够的铜箔面积，增大散热能力以维持结温在安全范围内；
- 布线尽量短且宽，减少寄生电感和压降，利于高频性能；
- 在可能出现反向冲击或高 dv/dt 的场合，配合 RC 吸收器或 TVS 以保护二极管免受过电压损伤；
- 注意反向漏电随温度快速上升，热设计时考虑高温下的漏电影响与器件老化。
五、可靠性与注意事项
- 持续正向电流以器件额定 1 A 为参考，实际应用中应根据 PCB 散热能力和环境温度进行适当降额；
- 非重复峰值浪涌 60 A 适用于短时启动或突发纹波，长期或重复大浪涌会降低寿命；
- 遵循制造商的回流焊温度曲线，避免超过器件最大结温；在高湿或腐蚀性环境下采取适当防护措施；
- 若需更高电压或更低漏电，可考虑并联或选择其它系列产品，但并联时需注意电流均衡问题。
六、小结
STPS140AY 以其低 Vf、快速特性和良好的浪涌承受能力，适合于多种中低压、高频电源整流与保护场合。合理的散热设计和电路防护可充分发挥其性能，满足工业与消费类电子的可靠性需求。欲获得完整电气特性曲线、封装图与回流焊工艺参数，请参阅 ST 官方数据手册。
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