Film Capacitors

Part Number	Description / PDF	Quantity
LDEEA1680JA0N00 KEMET	CAP FILM 6800PF 5% 100VDC 1206	2680
R75MR418050L3J KEMET	CAP FILM 1.8UF 5% 400VDC RADIAL	144
R474I212050A1KV057 KEMET	CAP FILM 0.012UF 10% 1KVDC RAD	0
R82EC1100SH50J KEMET	CAP FILM 1000PF 5% 100VDC RADIAL	32404
LDECA1330KA0N00 KEMET	CAP FILM 3300PF 10% 50VDC 1206	0
PHE426JD7100JR06L2 KEMET	CAP FILM 1UF 5% 300VDC RADIAL	308
C4AQSLW4300A33J KEMET	CAP FILM 3UF 5% 1.5KVDC RADIAL	8
MMK5223K250J01L16.5TR18 KEMET	CAP FILM 0.022UF 10% 250VDC RAD	0
C4AQPBW5150M36J KEMET	CAP FILM 15UF 5% 1.2KVDC RADIAL	0
C274AA24800AA0J KEMET	CAP FILM 8UF 5% 470VAC RADIAL	415
R75RF21005040J KEMET	CAP FILM 10000PF 5% 1.25KVDC RAD	1200
C4AF1BU4150A1WK KEMET	CAP FILM 1.5UF 10% 250VAC RADIAL	976
R46KI347050N0M KEMET	CAP FILM 0.47UF 20% 560VDC RAD	0
LDECD4100KA0N00 KEMET	CAP FILM 1UF 10% 50VDC 2220	13356
F862FY475K310ZV054 KEMET	CAP FILM 4.7UF 10% 630VDC RADIAL	120
C4AF1BW5245A3OK KEMET	CAP FILM 24.5UF 10% 250VAC RAD	17
R82EC1100AA50J KEMET	CAP FILM 1000PF 5% 100VDC RADIAL	3
C4BSPBX4100ZBJJ KEMET	CAP FILM 1UF 5% 1.2KVDC SCREW	42
LDBAA2180GC5N0 KEMET	CAP FILM 0.018UF 2% 16VDC 1206	0
LDECA1270KA0N00 KEMET	CAP FILM 2700PF 10% 50VDC 1206	0

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.