WMSIC Electronic Components

ST CK1A331M-CRE77 aluminum electrolytic capacitor

ModelCK1A331M-CRE77
PackageSMD,6.3x7.7mm
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

19 specifications

Core information

Product name
ST CK1A331M-CRE77
Type
ST
Minimum package
1000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
ST
Electronic Component
CK1A331M-CRE77
Electronic Component
1
Electronic Component
330uF
Package
SMD,6.3x7.7mm
Electronic Component
SMD Aluminum Electrolytic Capacitor
Electronic Component
±20%
Electronic Component
0.598g
Electronic Component
1
Electronic Component
BM0257678120
Electronic Component
2000hrs@105℃
Operating Temperature
40℃~+105℃
Voltage
10V
Capacitor
6.3mm
Capacitor
7.7mm

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

CK1A331M-CRE77 产品概述

本文档对 ST(先科)CK1A331M-CRE77 贴片铝电解电容做一个简明且实用的技术与应用概述,便于工程师在选型、布局与可靠性设计中快速把握关键点。

一、主要参数一览

  • 型号:CK1A331M-CRE77
  • 品牌:ST(先科)
  • 电容值:330 µF,精度 ±20%
  • 额定电压:10 V
  • 封装形式:SMD(贴片),电容体尺寸 D6.3 × L7.7 mm
  • 工作温度范围:-40 ℃ ~ +105 ℃
  • 额定寿命:2000 hours @ 105 ℃
  • 极性:有极性,须按标记正确安装(请注意阴极标识)

二、产品特性与优势

  • 小体积大容量:D6.3×L7.7 的紧凑封装在空间受限的应用中能提供 330µF 的有效容量,适合对体积有严格要求的消费及工业电子设备。
  • 高温长期可靠性:2000 小时 @ 105 ℃ 的寿命指标表明该系列在较高温度环境下仍具备稳定工作能力,适用于温度较高的工业场合或靠近热源的电路板。
  • 宽温度范围:-40 ℃ 至 +105 ℃,覆盖常见工业级工作温区。
  • 贴片工艺适配:SMD 形式便于自动化贴装与回流焊工艺,提高生产效率并利于实现高密度布局。

三、典型应用场景

  • 开关电源(DC-DC)输出端或输入端的滤波与储能;
  • 稳压芯片输出端的大容量去耦/旁路;
  • 消费类或工业类 PCB 中需要在有限空间内提供中等容量滤波的场合;
  • 对瞬态抑制、低频纹波缓冲有需求的电源回路。

四、选型与设计注意事项

  • 电压裕量(Derating):为延长寿命并降低故障风险,建议工作电压低于额定电压(常见做法为额定电压的 50%–80% 以内视具体工况而定)。尤其在高温环境下应更多考虑裕量。
  • 纹波电流与温升:铝电解电容的寿命与纹波电流引起的自热密切相关。请在电路设计时计算实际纹波电流并参考厂方 Datasheet 中的允许纹波电流与温升曲线,必要时并联多个电容以分担纹波。
  • 极性安装:该产品为有极性电容,安装时请严格遵守 PCB 上的极性标识,避免反接造成损坏或安全事故。
  • 并联与等效替代:若需要更低等效串联电阻(ESR)或更大有效容量,可并联多个相同型号或配合低 ESR 的固体电容使用,但并联结构需考虑老化与容差差异带来的影响。

五、焊接、布局与存储建议

  • 焊接工艺:采用回流焊时请严格遵循厂方推荐的回流温度曲线与峰值温度,避免过高峰值温度或长时间高温暴露导致电容性能衰减。若无厂方曲线,需与供应商确认以保证可靠性。
  • PCB 布局:将电容尽量靠近需去耦的芯片或稳压器布置,以缩短信号路径与寄生阻抗。为提高散热,避免将电容紧邻高温元件(如功率 MOSFET 或大功率电阻)。
  • 存储与烘烤:此类铝电解电容出厂通常为干燥包装。若包装开启后长时间暴露于潮湿环境,贴片电容可能需要按制造商建议进行烘烤处理以驱除水分,避免回流焊时产生气泡或性能退化。具体储存期限与烘烤条件请参照 Datasheet 与供货方说明。

六、可靠性与质量注意

  • 额定寿命说明:标注的 2000 hrs @ 105 ℃ 为在特定电压与温度应力下的加速寿命试验结果,实际使用寿命会受工作电压、纹波电流及工作温度等多因素影响。为确保长期可靠性,应进行适当的电压/温度降额设计。
  • 认证与应用边界:若用于对安全或车规有特殊认证要求(如 AEC-Q、UL 等),请在选型前确认该型号的认证状态与合规文件。

七、采购与资料获取

  • 订购型号:CK1A331M-CRE77(请与供应商确认完整的包装、批次与追溯信息);
  • 技术文档:建议在设计前获取并仔细阅读厂方完整 Datasheet,其中包含 ESR、等效串联电阻、纹波电流、温度特性曲线、回流曲线及推荐焊盘尺寸等关键参数。

如需我帮您查找该型号的详细 Datasheet、典型电阻/纹波曲线或推荐 PCB 焊盘布局示意,可提供具体需求,我将继续协助。

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