Film Capacitors

Part Number	Description / PDF	Quantity
P295BL252M500A KEMET	CAP FILM 2500PF 20% 500VAC RAD	370
R60DF4150506AJ KEMET	CAP FILM 1.5UF 5% 63VDC RADIAL	878
MMK5683J100J01L16.5TA18 KEMET	CAP FILM 0.068UF 5% 100VDC RAD	3000
R76UI212050H4J KEMET	CAP FILM 0.012UF 5% 2KVDC RAD	433
R60IR52205000K KEMET	CAP FILM 22UF 10% 250VDC RADIAL	304
R76IR433050H3J KEMET	CAP FILM 3.3UF 5% 250VDC RAD	61
R46KI22200001K1 KEMET	CAP FILM 0.022UF 10% 560VDC RAD	4930
R76PI233050H3J KEMET	CAP FILM 0.033UF 5% 630VDC RAD	798
R75TR31004040J KEMET	CAP FILM 0.1UF 5% 1.6KVDC RADIAL	986
C4AF1BU4470A11K KEMET	CAP FILM 4.7UF 10% 250VAC RADIAL	0
R82CC4220DQ70J KEMET	CAP FILM 2.2UF 5% 50VDC RADIAL	565
R463I310050M1K KEMET	CAP FILM 0.1UF 10% 630VDC RADIAL	2160
R463N347040N0M KEMET	CAP FILM 0.47UF 20% 630VDC RAD	13
R474F147050A1KV057 KEMET	CAP FILM 4700PF 10% 1KVDC RADIAL	0
R66MD2680AA7AK KEMET	CAP FILM 0.068UF 10% 400VDC RAD	0
C4BSPBX4150ZBLJ KEMET	CAP FILM 1.5UF 5% 1.2KVDC SCREW	127
R75GI333050H0J KEMET	CAP FILM 0.33UF 5% 160VDC RADIAL	890
R82EC1820SH50J KEMET	CAP FILM 8200PF 5% 100VDC RADIAL	0
SMC5.7222J100J33TR12 KEMET	CAP FILM 2200PF 5% 100VDC 2220	0
R46KN415040P1M KEMET	CAP FILM 1.5UF 20% 560VDC RADIAL	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.