Film Capacitors

Part Number	Description / PDF	Quantity
R46KF222040H1M KEMET	CAP FILM 0.022UF 20% 560VDC RAD	25
C4AQOBU5100M12J KEMET	CAP FILM 10UF 5% 900VDC RADIAL	0
R76TN24704040K KEMET	CAP FILM 0.047UF 10% 1.6KVDC RAD	0
276CC24400AA0J KEMET	CAP FILM 4UF 5% 470VAC RAD	158
LDECA1150JA0N00 KEMET	CAP FILM 1500PF 5% 50VDC 1206	2510
C4ATHBW4900A3LJ KEMET	CAP FILM 9UF 5% 600VDC RADIAL	1296
R46KN322000M1K KEMET	CAP FILM 0.22UF 10% 560VDC RAD	9867
F863DE474K310R KEMET	CAP FILM 0.47UF 10% 310VAC RAD	0
R60IW5220AA30K KEMET	CAP FILM 22UF 10% 250VDC RADIAL	106
R474R333050A2KV057 KEMET	CAP FILM 0.33UF 10% 1KVDC RADIAL	0
MMK5222K63J01L16.5TR18 KEMET	CAP FILM 2200PF 10% 63VDC RADIAL	2947
C44PLGR6100AASJ KEMET	CAP FILM 100UF 5% 700VDC RADIAL	54
R82DC3150DQ60K KEMET	CAP FILM 0.15UF 10% 63VDC RAD	3935
MMK5333K50J01L4BULK KEMET	CAP FILM 0.033UF 10% 50VDC RAD	0
R474R382050A1KV057 KEMET	CAP FILM 0.82UF 10% 1KVDC RADIAL	0
R73UI12204000J KEMET	CAP FILM 2200PF 5% 2KVDC RADIAL	326
R46KF315000P0M KEMET	CAP FILM 0.15UF 20% 560VDC RAD	1000
LDECD3470JA5N00 KEMET	CAP FILM 0.47UF 5% 50VDC 2220	6083
LDECA1680KA0N00 KEMET	CAP FILM 6800PF 10% 50VDC 1206	0
C4AQLBW5900A3OK KEMET	CAP FILM 90UF 10% 500VDC RADIAL	90

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.