Film Capacitors

Part Number	Description / PDF	Quantity
R46KF2470JUM1M KEMET	CAP FILM 0.047UF 20% 560VDC RAD	0
R75QI22704000J KEMET	CAP FILM 0.027UF 5% 1KVDC RADIAL	394
C4GAMUC3470AA0J KEMET	CAP FILM 0.47UF 5% 850VDC AXIAL	0
C4AF3BW4330A3FK KEMET	CAP FILM 3.3UF 10% 400VAC RADIAL	52
R533W520050P0K KEMET	CAP FILM 20UF 10% 630VDC RADIAL	0
PHE850EF6150MF11R06L2 KEMET	CAP FILM 0.15UF 20% 1.25KVDC RAD	0
R46KN322000M1M KEMET	CAP FILM 0.22UF 20% 560VDC RAD	5161
PHE450MK4390JR05 KEMET	CAP FILM 3900PF 5% 630VDC RADIAL	543
C4AQJBU5100M11J KEMET	CAP FILM 10UF 5% 700VDC RADIAL	37
SMR5103J63J01L16.5CBULK KEMET	CAP FILM 10000PF 5% 63VDC RADIAL	1456
C4AQOLW4650M33J KEMET	CAP FILM 6.5UF 5% 900VDC RADIAL	0
R76QI23905050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	0
C4ATGBW4680A3GJ KEMET	CAP FILM 6.8UF 5% 450VDC RADIAL	241
LDECC2470KA5N00 KEMET	CAP FILM 0.047UF 10% 50VDC 1812	0
R474I247050A1KV057 KEMET	CAP FILM 0.047UF 10% 1KVDC RAD	0
C4AQNBU4170M1WJ KEMET	CAP FILM 1.7UF 5% 1KVDC RADIAL	0
R66PD1220Z310K KEMET	CAP FILM 2200PF 10% 630VDC RAD	1593
C4AQQLU4140M11J KEMET	CAP FILM 1.4UF 5% 1.1KVDC RADIAL	0
R60PI310040L0K KEMET	CAP FILM 0.1UF 10% 630VDC RADIAL	520
R82EC2120AA50J KEMET	CAP FILM 0.012UF 5% 100VDC RAD	488

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.