Film Capacitors

Part Number	Description / PDF	Quantity
B32796E2406K TDK EPCOS	CAP FILM 40UF 10% 630VDC RADIAL	107
947D861K901DERSN Cornell Dubilier Electronics	CAP FILM 860UF 10% 900VDC RADIAL	0
265HC3500K4VM6 Cornell Dubilier Electronics	CAP FILM 2.6UF 500VAC CHAS MT	0
B32652A0393J000 TDK EPCOS	CAP FILM 0.039UF 5% 1KVDC RADIAL	0
F339X143333KII2B0 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.33UF 10% 800VDC RAD	0
MKT1820410255W Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.1UF 10% 250VDC RADIAL	0
150684J100FC Cornell Dubilier Electronics	CAP FILM 0.68UF 5% 100VDC AXIAL	3611400
B32024A3334M000 TDK EPCOS	CAP FILM 0.33UF 20% 1.5KVDC RAD	0
ECQ-E6394JFB Panasonic	CAP FILM 0.39UF 5% 630VDC RADIAL	0
B32686A0474J TDK EPCOS	CAP FILM 0.47UF 5% 1KVDC RADIAL	30
ECW-FD2W335KC Panasonic	CAP FILM 3.3UF 10% 450VDC RADIAL	0
BFC246853275 Vishay BC Components/Beyshlag/Draloric	CAP FILM 2.7UF 10% 250VDC RADIAL	0
R76TR339050H3J KEMET	CAP FILM 0.39UF 5% 1.6KVDC RAD	111
C44HFG35800ZB0J KEMET	CAP FILM 80UF 5% 400VDC RADIAL	0
BFC238302204 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.2UF 5% 250VDC RADIAL	0
EZP-Q38126LTB Panasonic	CAP FILM 12UF 5% 380VAC RADIAL	200
MKP1848H65070KY2 Vishay BC Components/Beyshlag/Draloric	CAP FILM 50UF 10% 700VDC RADIAL	0
930C6S27K-F Cornell Dubilier Electronics	CAP FILM 0.027UF 630VDC AXIAL	0
R76PI2820JH3EJ KEMET	CAP FILM 0.08UF 5% 630VDC RADIAL	1000
B32652A6273J000 TDK EPCOS	CAP FILM 0.027UF 5% 630VDC RAD	0

Film Capacitors

1. Overview

Film capacitors are a type of electronic component using plastic films (e.g., polypropylene, polyester) as dielectric materials. They are non-polarized capacitors with high insulation resistance, low loss, and excellent long-term stability. These capacitors play critical roles in power electronics, automotive systems, renewable energy, and consumer devices due to their reliability and high voltage-handling capabilities.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Polyester (PET)	Low cost, compact size, moderate temperature stability	General-purpose circuits, consumer electronics
Polypropylene (PP)	High voltage resistance, low dielectric loss, excellent thermal stability	Power supplies, motor drives, EV charging systems
Polycarbonate (PC)	High precision, low moisture absorption	Medical devices, aerospace instrumentation
Polyphenylene Sulfide (PPS)	High-temperature endurance, flame retardant	Automotive electronics, industrial automation
Polyimide (PI)	Ultra-high temperature resistance (up to 200 C), compact design	Aviation systems, downhole drilling equipment

3. Structure and Composition

Film capacitors typically consist of metalized plastic films wound or stacked into a cylindrical/rectangular core. The dielectric thickness ranges from 1-10 m, with electrode materials like zinc or aluminum. The assembly is encapsulated in epoxy resin or plastic housings. Key structural elements include:

Dielectric layer (plastic film)
Metallized electrode patterns
Termination electrodes (sprayed metal contacts)
Protective outer coating

4. Key Technical Parameters

Parameter	Description	Importance
Capacitance Range	0.1 nF - 100 F	Determines energy storage capacity
Rated Voltage	50 V - 10 kV	Defines operational safety limits
Capacitance Tolerance	1% to 20%	Affects circuit precision
Dissipation Factor	0.0001 - 0.05	Indicates energy efficiency
Insulation Resistance	10^9 - 10^12	Reflects leakage current performance
Operating Temperature	-55 C to +155 C	Dictates environmental adaptability
Temperature Coefficient	50 to 400 ppm/ C	Impacts stability under thermal stress
Stability	C/C < 2% over 10 years	Long-term reliability indicator

5. Application Fields

Main industries and equipment:

Power electronics: AC/DC converters, frequency inverters
Automotive: Electric vehicle (EV) on-board chargers, battery management systems
Consumer electronics: LED lighting, plasma TVs
Industrial: Uninterruptible power supplies (UPS), welding machines
Renewable energy: Solar inverters, wind turbine converters

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TDK Corporation	B32656 series	PP film, 480 F/1200 V for industrial inverters
KEMET	C4AZ-X7R4U3D106KE	Automotive-grade DC link capacitor
AVX	6TP105K	Tantalum polymer hybrid for aerospace
Vishay	MKP1848 series	Self-healing PP technology

7. Selection Guidelines

Key considerations:

Determine required capacitance and voltage ratings with safety margins
Assess environmental conditions (temperature, humidity, vibration)
Evaluate dielectric absorption and frequency response requirements
Consider packaging constraints (through-hole vs. surface-mount)
Analyze cost-performance trade-offs for mass production

8. Industry Trends

Emerging trends include: development of high-power-density capacitors for EVs, adoption of nanodielectric materials for improved thermal stability, growth of biodegradable film technologies, and integration of smart monitoring features in industrial capacitors. The market is projected to grow at 7.2% CAGR (2023-2030), driven by renewable energy and 5G infrastructure demands.