Film Capacitors

Part Number	Description / PDF	Quantity
B32776G8226J000 TDK EPCOS	CAP FILM 22UF 5% 800VDC RADIAL	0
B32656S7105K577 TDK EPCOS	CAP FILM 1UF 10% 1.25KVDC SCREW	295
B32621A6682J189 TDK EPCOS	CAP FILM 6800PF 5% 630VDC RADIAL	0
B32774X1305K000 TDK EPCOS	CAP FILM 3UF 10% 1.2KVDC RADIAL	1504
B32656A0474K000 TDK EPCOS	CAP FILM 0.47UF 10% 1KVDC RADIAL	0
B32529C1474J289 TDK EPCOS	CAP FILM 0.47UF 5% 100VDC RADIAL	4314
B25690A1487K101 TDK EPCOS	CAP FILM 480UF 10% 1.1KV RADIAL	0
B32522C3104M189 TDK EPCOS	CAP FILM 0.1UF 20% 250VDC RADIAL	0
B32924C3475M000 TDK EPCOS	CAP FILM 4.7UF 20% 630VDC RADIAL	0
B32529C3182M289 TDK EPCOS	CAP FILM 1800PF 20% RADIAL	0
B32021A3102M289 TDK EPCOS	CAP FILM 1000PF 20% 1.5KVDC RAD	88
B32754C2106K000 TDK EPCOS	CAP FILM 10UF 10% 500VDC RADIAL	468
B32529C1563J189 TDK EPCOS	CAP FILM 0.056UF 5% 100VDC RAD	0
B32560J6223J289 TDK EPCOS	CAP FILM 0.022UF 5% 400VDC 2DIP	0
B32672L8472K289 TDK EPCOS	CAP FILM 4700PF 10% 2KVDC RADIAL	0
B32653A6484J000 TDK EPCOS	CAP FILM 0.48UF 5% 630VDC RADIAL	0
B32520C1334J189 TDK EPCOS	CAP FILM 0.33UF 5% 100VDC RADIAL	0
B32523Q6684K000 TDK EPCOS	CAP FILM 0.68UF 10% 400VDC RAD	0
B32653A1682J289 TDK EPCOS	CAP FILM 6800PF 5% 1.6KVDC RAD	0
B32652A3474K000 TDK EPCOS	CAP FILM 0.47UF 10% 250VDC RAD	1779

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.