Film Capacitors

Part Number	Description / PDF	Quantity
C274AA24500AA0J KEMET	CAP FILM 5UF 5% 470VAC RADIAL	201
R413I2220DQM1M KEMET	CAP FILM 0.022UF 20% 1KVDC RAD	0
R75QI233050H0J KEMET	CAP FILM 0.033UF 5% 1KVDC RADIAL	900
C4AFBBW4470T3OK KEMET	FILM, RADIAL, POWER BOX, AC FILT	0
PHE426HD7470JR06L2 KEMET	CAP FILM 4.7UF 5% 250VDC RADIAL	0
R76TF13305050J KEMET	FILM, RADIAL, PULSE, DOUBLE META	0
PHE450HK4470JR05 KEMET	CAP FILM 4700PF 5% 250VDC RADIAL	1445
R463I322000L2M KEMET	CAP FILM 0.22UF 20% 630VDC RAD	0
R82DC3470DQ60J KEMET	CAP FILM 0.47UF 5% 63VDC RADIAL	88
R75QD0470DQ30J KEMET	CAP FILM 470PF 5% 1KVDC RADIAL	2650
LDECA1220MA0N00 KEMET	CAP FILM 2200PF 20% 50VDC 1206	0
R463R34704001M KEMET	CAP FILM 0.47UF 20% 630VDC RAD	343
R82EC2330DQ50K KEMET	CAP FILM 0.033UF 10% 100VDC RAD	81
R46KN410040N1M KEMET	CAP FILM 1UF 20% 560VDC RADIAL	232
R46KW422000M1M KEMET	CAP FILM 2.2UF 20% 560VDC RAD	0
C44UJGT6550A8SK KEMET	CAP FILM 550UF 10% 700VDC RADIAL	15
LDECA1820JA0N00 KEMET	CAP FILM 8200PF 5% 50VDC 1206	2990
C878BG35500SA0J KEMET	CAP FILM 50UF 5% 470VAC RADIAL	33
R413F1470CKM1M KEMET	CAP FILM 4700PF 20% 1KVDC RADIAL	1487
SMR5103J50J01L16.5CBULK KEMET	CAP FILM 10000PF 5% 50VDC RADIAL	1409

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.