行业组件数据 · 2026

Y电容

繁體:Y電容

Y电容,根据安全标准归类为Y类电容器,专门用于电气电路中带电导体(火线/零线)与地之间的连接。

技术定义与适配语境
典型 Y电容 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

Y电容,根据安全标准归类为Y类电容器,专门设计用于电气电路中带电导体(火线/零线)与地之间的连接。它为高频共模噪声提供低阻抗路径到地,同时通过加强绝缘和自愈特性维持电气安全。这些电容器是EMI滤波器中的关键元件,用于防止电磁干扰进入或离开电子设备。 Y电容通过提供电源线与地之间的受控电容耦合来工作。它们为高频共模噪声电流提供低阻抗路径,使其安全流向地,同时阻断较低频率的电源电流。这种差分滤波作用抑制电磁干扰,同时不损害电气安全,因为它们被设计为失效时开路而非短路。

组件规格

定义
Y电容,根据安全标准归类为Y类电容器,专门设计用于电气电路中带电导体(火线/零线)与地之间的连接。它为高频共模噪声提供低阻抗路径到地,同时通过加强绝缘和自愈特性维持电气安全。这些电容器是EMI滤波器中的关键元件,用于防止电磁干扰进入或离开电子设备。

Y电容通过提供电源线与地之间的受控电容耦合来工作。它们为高频共模噪声电流提供低阻抗路径,使其安全流向地,同时阻断较低频率的电源电流。这种差分滤波作用抑制电磁干扰,同时不损害电气安全,因为它们被设计为失效时开路而非短路。
工作原理
Y-capacitors work by providing a controlled capacitive coupling between the power lines and ground. They create a low-impedance path for high-frequency common-mode noise currents to flow safely to ground, while blocking lower frequency power currents. This differential filtering action suppresses electromagnetic interference without compromising electrical safety, as they are designed to fail open-circuit rather than short-circuit.
材料
金属化聚丙烯或聚酯薄膜介质具有自愈特性环氧树脂封装铜或镀锡铜引线阻燃塑料外壳符合UL94 V-0等级。
Capacitance Range
1 nF – 47 nFnF
Tolerance
±10% or ±20%%
Safety Class
Y1 or Y2class
Rated Voltage
250 VAC or 400 VACVAC
Temperature Range
-40°C to +85°C (or +105°C for some)°C
Dielectric Strength
Y1: 4000 VAC for 60s; Y2: 1500 VAC for 60sVAC
Insulation Resistance
≥ 10,000 MΩ (at 25°C, 100 VDC)
Lead Material
Tinned copper or copper-clad steelmaterial
Case Material
Flame-retardant plastic, UL94 V-0rating
Dielectric Material
Metallized polypropylene (PP) or polyester (PET)material
Capacitance Drift
≤ 5% after 1000 hours at rated voltage and upper temperature%
Dissipation Factor
≤ 0.1% at 1 kHz, 25°C%
Ambient temperature
-40°C to +85°C (up to +105°C for some)
AC voltage (line-to-ground)
Up to rated voltage (250VAC for Y2, 400VAC for Y1)
Impulse voltage (transient)
Y1: up to 8kV peak; Y2: up to 5kV peak
Frequency of AC supply
50/60 Hz (standard)
Humidity
Up to 95% RH (non-condensing)
标准
IEC 60384-14UL 94UL 1414EN 132400

行业分类与别名

Y电容 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Dielectric breakdown due to voltage spikes->Short circuit between terminals->Use self-healing dielectric materials, implement overvoltage protection circuits, select appropriate safety class (Y1/Y2)
Thermal stress from high ambient temperatures->Increased leakage current, reduced capacitance->Select capacitors with appropriate temperature rating, ensure proper ventilation, monitor operating temperature
Mechanical damage during installation->Cracked casing leading to moisture ingress->Follow proper handling procedures, use strain relief for leads, implement visual inspection

工业生态与工程逻辑

0
Electric shock hazard if capacitor fails shorted
1
Ground leakage current exceeding safety limits
2
Reduced effectiveness due to aging or temperature extremes
3
Incorrect installation causing safety compliance issues

合规与检测

tolerance
Capacitance tolerance ±20%, leakage current <0.25mA for medical devices, impulse withstand voltage per safety class
test method
IEC 60384-14 safety tests including dielectric strength, insulation resistance, endurance, humidity resistance, and flammability tests

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来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the difference between X and Y capacitors?

X-capacitors are connected between line and neutral (differential mode filtering) while Y-capacitors are connected between line/neutral and ground (common-mode filtering). Y-capacitors have stricter safety requirements due to their connection to ground.

Why are Y-capacitors considered safety components?

Y-capacitors must meet stringent safety standards because they connect directly to ground. They are designed with reinforced insulation and self-healing properties to prevent electric shock hazards even if they fail.

What do Y1, Y2, Y3, and Y4 classifications mean?

These classifications indicate different safety levels based on rated impulse voltage: Y1 (8kV), Y2 (5kV), Y3 (n/a), Y4 (2.5kV). Higher numbers indicate higher safety requirements for different applications.

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CNFX Industrial Component Index · 电气设备制造

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