Film Capacitors

Part Number	Description / PDF	Quantity
B25620B1427K101 TDK EPCOS	CAP FILM 420UF 10% 1.1KVDC RAD	0
R76QW410050H3J KEMET	CAP FILM 1UF 5% 1KVDC RADIAL	96
184472K630RBA-F Cornell Dubilier Electronics	CAP FILM 4700PF 10% 630VDC RAD	0
R82EC1220SH50J KEMET	CAP FILM 2200PF 5% 100VDC RADIAL	52500
F339X133348MFI2B0 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.033UF 20% 1KVDC RAD	0
F339X122233MDI2B0 Vishay BC Components/Beyshlag/Draloric	CAP FILM 2200PF 20% 800VDC RAD	0
B32621A3223K289 TDK EPCOS	CAP FILM 0.022UF 10% 250VDC RAD	0
C878BG35600SA0J KEMET	CAP FILM 60UF 5% 470VAC RADIAL	0
R60IN4100AA30K KEMET	CAP FILM 1UF 10% 250VDC RADIAL	1492
B32529C8223J289 TDK EPCOS	CAP FILM 0.022UF 5% 630VDC RAD	0
CMPX154K301L150B-18X14.5X8.5 Trigon Components	CMPX-X1 FILM CAP 0.15UF 10%	0
B32653A1183J000 TDK EPCOS	CAP FILM 0.018UF 5% 1.6KVDC RAD	0
BFC233820105 Vishay BC Components/Beyshlag/Draloric	CAP FILM 1UF 20% 630VDC RADIAL	2
FFVS6C0306K-- Elco (AVX)	CAP FILM 30UF 10% 900VDC RADIAL	4
BFC233861334 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.33UF 10% 1KVDC RADIAL	0
MMK5394J100J04L4BULK KEMET	CAP FILM 0.39UF 5% 100VDC RADIAL	939
MKP1839143633G Vishay BC Components/Beyshlag/Draloric	CAP FILM 430PF 2.5% 630VDC AXIAL	0
B25631B0107K900 TDK EPCOS	CAP FILM 100UF 10% 900V RADIAL	11
BFC233990071 Vishay BC Components/Beyshlag/Draloric	CAP FILM 0.033UF 10% 630VDC RAD	0
ECQ-E6683KFB Panasonic	CAP FILM 0.068UF 10% 630VDC RAD	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.