Film Capacitors

Part Number	Description / PDF	Quantity
PHE426KA5220JR05 KEMET	CAP FILM 0.022UF 5% 400VDC RAD	2970
F161ZS124K630V KEMET	CAP FILM 0.12UF 10% 630VDC SMD	0
C44PMGR6166RASJ KEMET	CAP FILM 166UF 5% 1.1KVDC RAD	10
R76MI2470SE30K KEMET	CAP FILM 0.047UF 10% 400VDC RAD	860
R75RW418050H3J KEMET	CAP FILM 1.8UF 5% 1.25KVDC RAD	2
R75II3390AA40J KEMET	CAP FILM 0.39UF 5% 250VDC RADIAL	392
R73QI1470SE30K KEMET	CAP FILM 4700PF 10% 1KVDC RADIAL	3708
C44UJGT6225A8TK KEMET	CAP FILM 225UF 10% 700VDC RADIAL	49
C4AQIBW5400A3OJ KEMET	CAP FILM 40UF 5% 800VDC RADIAL	0
R82EC3150SH70J KEMET	CAP FILM 0.15UF 5% 100VDC RADIAL	30000
R82EC2470Z360K KEMET	CAP FILM 0.047UF 10% 100VDC RAD	3850
R46KN3470JBN0M KEMET	CAP FILM 0.47UF 20% 560VDC RAD	0
C4AQLBU5250A12K KEMET	CAP FILM 25UF 10% 500VDC RADIAL	291
C878BF35200SA0J KEMET	CAP FILM 20UF 5% 470VAC RADIAL	334
R76TR339050H3J KEMET	CAP FILM 0.39UF 5% 1.6KVDC RAD	111
C44HFG35800ZB0J KEMET	CAP FILM 80UF 5% 400VDC RADIAL	0
R76PI2820JH3EJ KEMET	CAP FILM 0.08UF 5% 630VDC RADIAL	1000
R82EC1330SH50J KEMET	CAP FILM 3300PF 5% 100VDC RADIAL	3500
C274ACF5150WA0J KEMET	CAP FILM 15UF 5% 470VAC RADIAL	42
C4DEHPQ6150A8TK KEMET	CAP FILM 150UF 10% 600VDC RADIAL	37

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.