Film Capacitors

Part Number	Description / PDF	Quantity
MKP1839130632G Vishay BC Components/Beyshlag/Draloric	CAP FILM 300PF 2% 630VDC AXIAL	0
R75RN31004030J KEMET	CAP FILM 0.1UF 5% 1.25KVDC RAD	363
B32373A4307J020 TDK EPCOS	CAP FILM 300UF 5% 1.05KVDC RAD	0
ECQ-E2184KF Panasonic	CAP FILM 0.18UF 10% 250VDC RAD	1604
MKT1820615016 Vishay BC Components/Beyshlag/Draloric	CAP FILM 15UF 20% 100VDC RADIAL	0
BFC2370EM563 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.056UF 5% 250VDC RAD	0
890334022007 Würth Elektronik Midcom	CAP FILM 0.015UF 10% 310VAC RAD	178
B32671L0822J289 TDK EPCOS	CAP FILM 8200PF 5% 1KVDC RADIAL	0
ECQ-E2183KB Panasonic	CAP FILM 0.018UF 10% 250VDC RAD	2159
R75LI28204000K KEMET	CAP FILM 0.082UF 10% 560VDC RAD	30
B32921C3683M189 TDK EPCOS	CAP FILM 0.068UF 20% 630VDC RAD	758
DME2S1K-F Cornell Dubilier Electronics	CAP FILM 10000PF 10% 250VDC RAD	14291500
R75LN34704000K KEMET	CAP FILM 0.47UF 10% 630VDC RAD	584
B32520C0474M189 TDK EPCOS	CAP FILM 0.47UF 20% 63VDC RADIAL	0
824PSB252K4R Cornell Dubilier Electronics	CAP FILM 0.82UF 10% 2.5KVDC RAD	0
ECQ-E4103KF Panasonic	CAP FILM 10000PF 10% 400VDC RAD	6974
BFC233918332 Vishay BC Components/Beyshlag/Draloric	CAP FILM 3300PF 10% 630VDC RAD	0
ECQ-E4105KFW Panasonic	CAP FILM 1UF 10% 400VDC RADIAL	0
C4AQQBW5120M3JJ KEMET	CAP FILM 12UF 5% 1.1KVDC RADIAL	0
ECW-H12682JV Panasonic	CAP FILM 6800PF 5% 1.25KVDC RAD	153

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.