Film Capacitors

Part Number	Description / PDF	Quantity
MKP386M422200JT1 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.22UF 5% 2KVDC SCREW	0
185103K400RHB-F Cornell Dubilier Electronics	CAP FILM 10000PF 10% 400VDC RAD	0
BFC233868106 Vishay BC Components/Beyshlag/Draloric	CAP FILM 4700PF 20% 1KVDC RADIAL	0
DME2S68K-F Cornell Dubilier Electronics	CAP FILM 0.068UF 10% 250VDC RAD	41
MKT1820547255V Vishay BC Components/Beyshlag/Draloric	CAP FILM 4.7UF 10% 250VDC RADIAL	0
B32652A0183K000 TDK EPCOS	CAP FILM 0.018UF 10% 1KVDC RAD	0
PHE450MK4470JR05 KEMET	CAP FILM 4700PF 5% 630VDC RADIAL	6216
150223K250BB Cornell Dubilier Electronics	CAP FILM 0.022UF 250VDC AXIAL	0
R79IC2330AA45J KEMET	CAP FILM 0.033UF 5% 250VDC RAD	1428
BFC237019125 Vishay BC Components/Beyshlag/Draloric	CAP FILM 1.2UF 5% 63VDC RADIAL	0
ECW-F4684JL Panasonic	CAP FILM 0.68UF 5% 400VDC RADIAL	1335
MKP1848630094Y5 Vishay BC Components/Beyshlag/Draloric	CAP FILM 30UF 5% 900VDC RADIAL	0
B32672Z6474K189 TDK EPCOS	CAP FILM 0.47UF 10% 630VDC RAD	0
BFC237045393 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.039UF 10% 250VDC RAD	0
B32672L1562J000 TDK EPCOS	CAP FILM 5600PF 5% 1.6KVDC RAD	0
R66DD4220AA6AJ KEMET	CAP FILM 2.2UF 5% 63VDC RADIAL	930
940C16P15K-F Cornell Dubilier Electronics	CAP FILM 0.15UF 1.6KVDC AXIAL	846500
B32520C6223K289 TDK EPCOS	CAP FILM 0.022UF 10% 400VDC RAD	68
R46KI315000M2K KEMET	CAP FILM 0.15UF 10% 560VDC RAD	829
ECQ-E2565KF Panasonic	CAP FILM 5.6UF 10% 250VDC RADIAL	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.