Film Capacitors

Part Number	Description / PDF	Quantity
R75RI22705030M KEMET	CAP FILM 0.027UF 1.25KVDC RADIAL	0
C4GADUD5150AA1J KEMET	CAP FILM 15UF 5% 250VDC AXIAL	31
C4AQQBW5200M3OJ KEMET	CAP FILM 20UF 5% 1.1KVDC RADIAL	0
R82EC1150Z350K KEMET	CAP FILM 1500PF 10% 100VDC RAD	4000
C44UUGQ6250F8SK KEMET	CAP FILM 250UF 10% 1.3KVDC RAD	0
R413I222050M1M KEMET	CAP FILM 0.022UF 20% 1KVDC RAD	730
R46KI315040M2K KEMET	CAP FILM 0.15UF 10% 560VDC RAD	0
C44PLGR6500RBSK KEMET	CAP FILM 500UF 10% 700VDC RADIAL	4
R46KF2100JPM1M KEMET	CAP FILM 10000PF 20% 560VDC RAD	0
R82DC3470CK60J KEMET	CAP FILM 0.47UF 5% 63VDC RAD	1485
R82EC3100AA70J KEMET	CAP FILM 0.1UF 5% 100VDC RADIAL	0
R463N410000N2M KEMET	CAP FILM 1UF 20% 630VDC RADIAL	13341
R413F122050T0K KEMET	CAP FILM 2200PF 10% 1.5KVDC RAD	1574
R413R32205000M KEMET	CAP FILM 0.22UF 20% 1KVDC RAD	0
R82MC1330DQ50J KEMET	CAP FILM 3300PF 5% 400VDC RADIAL	3500
PFR5331J63J11L4BULK KEMET	CAP FILM 330PF 5% 63VDC RADIAL	2713
R46KI360045N0M KEMET	CAP FILM 0.6UF 20% 560VDC RAD	0
MMK5822J50J01L4BULK KEMET	CAP FILM 8200PF 5% 50VDC RADIAL	3998
MMK10103K400A01L4BULK KEMET	CAP FILM 10000PF 10% 400VDC RAD	2000
R46KN322050M1M KEMET	CAP FILM 0.22UF 20% 560VDC RAD	970

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.