Film Capacitors

Part Number	Description / PDF	Quantity
R46KI32200002K KEMET	CAP FILM 0.22UF 10% 560VDC RAD	0
R533I356050P0K KEMET	CAP FILM 0.56UF 10% 630VDC RAD	0
C4ASPBW4120A3JJ KEMET	CAP FILM 1.2UF 5% 1.2KVDC RADIAL	0
F612JG274J100C KEMET	CAP FILM 0.27UF 5% 100VDC RADIAL	1980
R76QR31004040J KEMET	CAP FILM 0.1UF 5% 1KVDC RADIAL	0
R46KN410000P0M KEMET	CAP FILM 1UF 20% 560VDC RADIAL	645
R46KI347050P1M KEMET	CAP FILM 0.47UF 20% 560VDC RAD	3649
R82MC2100DQ50K KEMET	CAP FILM 10000PF 10% 400VDC RAD	1023
R75PI318050H7J KEMET	CAP FILM 0.18UF 5% 630VDC RADIAL	490
R46KN3680JBM2M KEMET	CAP FILM 0.68UF 20% 560VDC RAD	392
C4AEGBU5200A12J KEMET	CAP FILM 20UF 5% 450VDC RADIAL	178
PHE450KF7220JR06L2 KEMET	CAP FILM 2.2UF 5% 400VDC RADIAL	0
R413F1220DQ00M KEMET	CAP FILM 2200PF 20% 1KVDC RAD	0
R46KN415040P0M KEMET	CAP FILM 1.5UF 20% 560VDC RADIAL	55
LDEDB3100KA0N00 KEMET	CAP FILM 0.1UF 10% 63VDC 1210	1577
R71MI41004030K KEMET	CAP FILM 1UF 10% 420VDC RADIAL	682
LDEPD2100JA5N00 KEMET	CAP FILM 10000PF 5% 630VDC 2220	3482
C3B2AC55500B20K KEMET	CAP FILM 250V	38
C4AQQLW5140A38J KEMET	CAP FILM 14UF 5% 1.1KVDC RADIAL	34
C44UVGT6300M87K KEMET	CAP FILM 300UF 10% 1.8KVDC RAD	10

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.