Film Capacitors

Part Number	Description / PDF	Quantity
QYX1H122JTP Nichicon	CAP FILM 1200PF 5% 50VDC RADIAL	2620
R46KR447050P1M KEMET	CAP FILM 4.7UF 20% 560VDC RAD	0
168682K100A-F Cornell Dubilier Electronics	CAP FILM 6800PF 10% 100VDC RAD	0
MKP1839322255R Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.022UF 10% 250VDC AXL	0
MKP385E36885KIM2T0 Vishay BC Components/Beyshlag/Draloric	MKP385E 0.068UF 10% 850 PITCH 22	0
R75PW447050H3J KEMET	CAP FILM 4.7UF 5% 630VDC RADIAL	83
ECW-FD2W124J4 Panasonic	CAP FILM 0.12UF 5% 450VDC RADIAL	2537
B32652A1682K000 TDK EPCOS	CAP FILM 6800PF 10% 1.6KVDC RAD	0
890324027006 Würth Elektronik Midcom	CAP FILM 0.68UF 10% 275VAC RAD	47
BFC237226154 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.15UF 5% 100VDC RADIAL	0
664HC1600K2SM6 Cornell Dubilier Electronics	CAP FILM 0.66UF 10% 600VAC CHASS	12
BFC233820223 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.022UF 20% 630VDC RAD	8832
149775 TubeDepot	CAP FILM .47UF 630V SIL LEAD COP	7
R75TN239050H3J KEMET	CAP FILM 0.039UF 5% 1.6KVDC RAD	249
MKP1848C64060JP5 Vishay BC Components/Beyshlag/Draloric	CAP FILM 40UF 5% 600VDC RADIAL	0
ECQ-E2154KFB Panasonic	CAP FILM 0.15UF 10% 250VDC RAD	0
BFC233910222 Vishay BC Components/Beyshlag/Draloric	CAP FILM 2200PF 10% 630VDC RAD	0
204HC3102K4TM6 Cornell Dubilier Electronics	CAP FILM 0.2UF 10% 1KVAC CHAS MT	0
MLR224K630 NTE Electronics, Inc.	CAP FILM 0.22UF 10% 630VDC RAD	780
QXP2G333KRPT Nichicon	CAP FILM 0.033UF 10% 400VDC RAD	481

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.