Film Capacitors

Part Number	Description / PDF	Quantity
B32933B3474K26 TDK EPCOS	CAP FILM 0.47UF 10% 305VAC RAD	0
B32776T1275K000 TDK EPCOS	CAP FILM 2.7UF 10% 1.3KVDC RAD	944
B32526T6565K000 TDK EPCOS	CAP FILM 5.6UF 10% 400VDC RADIAL	889
B32923C3684M000 TDK EPCOS	CAP FILM 0.68UF 20% 630VDC RAD	16783
B32529C1182J000 TDK EPCOS	CAP FILM 1800PF 5% 100VDC RADIAL	2631
B32522C0155J000 TDK EPCOS	CAP FILM 1.5UF 5% 63VDC RADIAL	0
B32922C3154M000 TDK EPCOS	CAP FILM 0.15UF 20% 630VDC RAD	24033
B32373A5107J030 TDK EPCOS	CAP FILM 100UF 5% 330VAC RADIAL	0
B32924B4335K000 TDK EPCOS	CAP FILM 3.3UF 10% 650VDC RADIAL	456
B32922C3224M289 TDK EPCOS	CAP FILM 0.22UF 20% 630VDC RAD	7450
B32653A0683J289 TDK EPCOS	CAP FILM 0.068UF 5% 630VDC RAD	0
B32529C8333J289 TDK EPCOS	CAP FILM 0.033UF 5% 630VDC RAD	0
B32521C6683J189 TDK EPCOS	CAP FILM 0.068UF 5% 400VDC RAD	0
B32521C3224J000 TDK EPCOS	CAP FILM 0.22UF 5% 250VDC RADIAL	1806
B32521N8103J000 TDK EPCOS	CAP FILM 10000PF 5% 630VDC RAD	2209
B32529C1823J289 TDK EPCOS	CAP FILM 0.082UF 5% 100VDC RAD	5265
B32672L1333J289 TDK EPCOS	CAP FILM 0.033UF 5% 1.6KVDC RAD	2787
B32529C1473J289 TDK EPCOS	CAP FILM 0.047UF 5% 100VDC RAD	12300
B32522Q8683K000 TDK EPCOS	CAP FILM 0.068UF 10% 630VDC RAD	0
B32653A2332K289 TDK EPCOS	CAP FILM 3300PF 10% 2KVDC RADIAL	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.