Film Capacitors

Part Number	Description / PDF	Quantity
334PSB700K2H Cornell Dubilier Electronics	CAP FILM 0.33UF 10% 700VDC RAD	0
125LC3600K5LM8 Cornell Dubilier Electronics	CAP FILM 1.2UF 10% 600VAC SMD	0
715P33354KD3 Cornell Dubilier Electronics	CAP FILM 0.033UF 5% 400VDC RAD	88
WMF05P1K-F Cornell Dubilier Electronics	CAP FILM 0.1UF 10% 50VDC AXIAL	0
930C2P27K-F Cornell Dubilier Electronics	CAP FILM 0.27UF 10% 250VDC AXIAL	0
226MWR100K Cornell Dubilier Electronics	CAP FILM 22UF 10% 100VDC AXIAL	0
158X105K Cornell Dubilier Electronics	CAP FILM 1UF 10% 275VAC RADIAL	0
ALH685K251A082 Cornell Dubilier Electronics	6.8UF 250VAC 32X37X22MM LS=27.5	420
ALH206K251B104 Cornell Dubilier Electronics	20UF 250VAC 42.5X45X30MM LS=37.5	210
334HC2800K2SM6 Cornell Dubilier Electronics	CAP FILM 0.33UF 10% 800VAC CHASS	16
224MKP275KBG4 Cornell Dubilier Electronics	CAP FILM 0.22UF 10% 310VAC RAD	0
305PMB700KBP0 Cornell Dubilier Electronics	CAP FILM 3UF 10% 700VDC CHAS MT	0
935C1W20K-F Cornell Dubilier Electronics	CAP FILM 20UF 10% 100VDC AXIAL	34
160224K630N-F Cornell Dubilier Electronics	CAP FILM 0.22UF 10% 630VDC RAD	0
255QPC250KA3A1C5 Cornell Dubilier Electronics	CAP FILM 2.5UF 250VAC CHAS MT	0
DMT6D47K-F Cornell Dubilier Electronics	CAP FILM 4700PF 10% 630VDC RAD	134
334PSB122K4H Cornell Dubilier Electronics	CAP FILM 0.33UF 10% 1.2KVDC RAD	0
FCN6040E105K-S Cornell Dubilier Electronics	CAP FILM 1UF 10% 250VDC 6039	0
223MPR630K Cornell Dubilier Electronics	CAP FILM 0.022UF 10% 630VDC RAD	6000
WMF4P22K-F Cornell Dubilier Electronics	CAP FILM 0.22UF 10% 400VDC AXIAL	631400

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.