Film Capacitors

Very low lossat high frequency
Small internal temperature rise
High insulation resistance
excellentself-healing property
long life

Low loss ≤0.0008%
low noise
Small internal temperature rise and good self-healing
Low frequency loss
High temperature resistance 105℃

Excellent frequency and temperature characteristics
Low loss, smallinherent temperature rise and high reliability
Negativetemperature coefficient of capacitance and good stability

Small size, light weight and low cost
High stability and reliability
Dissipation factor is small because the leads are directly welded to electrodes

Safety Capacitor – X2 Capacitor

Compact size
Excellent flame retardant abilities
High insulation resistance
excellentself-healing
high reliability
Very lowloss at high frequency
excellenttemperature characteristics
withstanding5KV impulse voltage

Box type provides the identical dimensions
Excellent flame retardant abilities
High insualtion resistance,
excellent self-healing property
long life
Withstanding 2.5KV impulse voltage
As an across-the-line type noise suppression capacitor
suitable for AC

Safety Capacitor – Y Capacitor

Ideal for across the line applications
Compact size
Cost effective product
Safety standards recognized for AC applications

Ideal for across the line applications
Compact size
Cost effective product
Safety standards recognized for AC applications

Aluminum Electrolytic Capacitor

Aluminum electrolytic capacitor
Low cost, high cost performance
Large capacity, wide range of specifications
Mature technology and high stability

Smd electrolytic capacitor
Small size, small volume
Low labor cost
Mature technology and high stability

Snap In Capacitor
Large capacity and low voltage coexist
Wide range of specifications
Mature technology and high stability

Screw capacitor
Super large capacity
Enough storage power
Mature technology and high stability

Recently News

How to Select Film Capacitors for 800V SiC Inverters

abby xaunsn2026-09-04T01:48:00+00:00September 4th, 2026|Comments Off on How to Select Film Capacitors for 800V SiC Inverters

Selecting the right film capacitor for an 800V SiC inverter comes down to four core criteria: voltage rating with 1.3–1.5× derating (an 800V bus demands 1000–1200V DC-rated parts), low ESL (under 20–50 nH to match [...]

How 800V SiC Inverters Change DC-Link Film Capacitor Requirements

abby xaunsn2026-08-31T02:29:09+00:00August 27th, 2026|0 Comments

800V SiC 逆变器对直流链路薄膜电容的压力远超任何基于 IGBT 的设计。母线电压攀升至 800V 级，开关频率也从几千赫兹提升至几十千赫兹。这两个因素共同作用，导致电容必须承受的纹波电流增大，其上的电压变化率 (dv/dt) 陡峭化，并将更多热量集中在更小的区域——这正是薄膜电容发挥其作用或成为系统薄弱环节的关键所在。这是我们800V碳化硅系列文章的第一篇，继我们之前关于eVTOL直流链路薄膜电容器的研究之后。本文提出的问题很具体：当逆变器采用800V碳化硅电容器时，直流链路电容器需要做哪些调整？应该如何选择合适的规格？逆变器采用碳化硅后，究竟有哪些变化？碳化硅开关与硅基IGBT有两个不同之处。首先，它们的开关速度更快，因此开关频率从个位数千赫兹提升到数十千赫兹。其次，它们产生的电压边沿更陡峭，因为从导通到关断的转换时间大大缩短。这两个变化都会影响直流母线电容。更高的开关频率会将电容所承受的纹波电流向更高频率移动，并增加谐波。更陡峭的 dv/dt 意味着电容必须在母线上更快地吸收和释放电荷。结果相同：需要承载的纹波电流更大，自发热更严重，温度控制也更严格。这就是为什么 800 V 平台不仅仅是 400 V 设计的高压版本——电容器规格同时在两个维度上发生变化。 800V SiC逆变器所需的三个数字为 800 V SiC 逆变器指定直流链路薄膜电容器时，三个数字决定了大部分性能。开关频率下的纹波电流纹波电流是指电容器在直流母线之外所承受的交流电流。由于碳化硅 (SiC) 的工作频率高达数十千赫兹，纹波频率更高，谐波也更多，因此在相同功率水平下，电容器所承受的有效值电流 (RMS) [...]

How to Choose a DC-Link Film Capacitor for eVTOL and High-Power Drives

abby xaunsn2026-08-31T02:28:16+00:00August 19th, 2026|0 Comments

选择直流母线薄膜电容器主要取决于四个参数：额定电压和降额电压、纹波电流、ESR（等效串联电阻）以及与逆变器匹配的容量。这四个参数都选对了，电容器就能稳定运行；任何一个参数出错，它都可能成为驱动器的故障点。在之前关于电动垂直起降飞行器（eVTOL）直流链路薄膜电容器的文章中，我们阐述了为什么薄膜电容器是电动航空和高功率驱动系统的理想选择。本文将详细介绍如何选择合适的器件。首先要考虑电压额定值和降额。直流母线上的电容器位于母线上，该母线电压在负载阶跃和再生过程中可能会高于额定值。通常的做法是将电容器的额定电压设置为母线额定电压的 1.5 到 2 倍，以留出过冲裕度。对于 800V 的母线，这意味着需要使用额定电压为 1000V 或更高的电容器。检查额定直流电压和浪涌或瞬态耐受能力。为开关过冲和工作温度预留降额裕度。然后是纹波电流和ESR 直流母线电容必须能够承受开关频率下的纹波电流。较高的纹波会使元件内部发热；低ESR值可以降低这种发热。纹波电流额定值——该器件必须能够承受实际会遇到的 RMS 纹波。开关频率下的 ESR - 较低的 ESR 意味着更少的自发热和更小的总线纹波电压。温度升高- 将纹波额定值降低至实际环境温度。能量、电容和尺寸对于电动垂直起降飞行器和高功率驱动系统，直流链路还能存储能量，帮助系统度过短暂的负载阶跃。电容和电压决定了存储的能量（1/2 x C x V2），这也决定了物理尺寸：电容- [...]