Film Capacitors

Part Number	Description / PDF	Quantity
R82EC1330Z350K KEMET	CAP FILM 3300PF 10% 100VDC RAD	3658
R76TI21004040J KEMET	CAP FILM 10000PF 5% 1.6KVDC RAD	2822
F873DP104M760L KEMET	CAP FILM 0.1UF 20% 1.5KVDC RAD	760
R75UI118050H4J KEMET	CAP FILM 1800PF 5% 2KVDC RADIAL	1316
C276CC24300AA0J KEMET	CAP FILM 3UF 5% 470VAC RADIAL	161
R60DR5220AA30J KEMET	CAP FILM 22UF 5% 63VDC RADIAL	475
R533R418050P0K KEMET	CAP FILM 1.8UF 10% 630VDC RADIAL	0
C4AEJBW5550A3NJ KEMET	CAP FILM 55UF 5% 700VDC RADIAL	0
LDECA2120KA0N00 KEMET	CAP FILM 0.012UF 10% 50VDC 1206	0
C4AQILW5160M36J KEMET	CAP FILM 16UF 5% 800VDC RADIAL	0
C4AQIBU5125A12J KEMET	CAP FILM 12.5UF 5% 800VDC RADIAL	0
R413R322050T0K KEMET	CAP FILM 0.22UF 10% 1.5KVDC RAD	152
R46KN410040P0M KEMET	CAP FILM 1UF 20% 560VDC RADIAL	349
C878BF35100AA0J KEMET	CAP FILM 10UF 5% 470VAC RADIAL	0
C274ACF5350WA0J KEMET	CAP FILM 35UF 5% 470VAC RADIAL	38
R46KI2470DQ01K KEMET	CAP FILM 0.047UF 10% 560VDC RAD	786
R75QN3100AA00K KEMET	CAP FILM 0.1UF 10% 1KVDC RADIAL	0
R60MN34705030K KEMET	CAP FILM 0.47UF 10% 400VDC RAD	0
R75IR42204050J KEMET	CAP FILM 2.2UF 5% 250VDC RADIAL	0
C276CC25160AA0J KEMET	CAP FILM 16UF 5% 470VAC RADIAL	161

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.