Film Capacitors

Part Number	Description / PDF	Quantity
B32524Q6225J TDK EPCOS	CAP FILM 2.2UF 5% 400VDC RADIAL	804
B25620B1297K982 TDK EPCOS	CAP FILM 295UF 10% 1.98KVDC RAD	0
B32529C1103K289 TDK EPCOS	CAP FILM 10000PF 10% 100VDC RAD	19098
B32774D0205K189 TDK EPCOS	CAP FILM 2UF 10% 1.1KVDC RADIAL	0
B32932A3224K189 TDK EPCOS	CAP FILM 0.22UF 10% 305VAC RAD	268
B32023A3334M000 TDK EPCOS	CAP FILM 0.33UF 20% 1.5KVDC RAD	13
B32913A5154K000 TDK EPCOS	CAP FILM 0.15UF 10% 530VAC RAD	0
B32529C3683J189 TDK EPCOS	CAP FILM 0.068UF 5% 250VDC RAD	0
B32529C0152J289 TDK EPCOS	CAP FILM 1500PF 5% 63VDC RADIAL	3905
B32778G8456J000 TDK EPCOS	CAP FILM 45UF 5% 800VDC RADIAL	0
B32529C1473J000 TDK EPCOS	CAP FILM 0.047UF 5% 100VDC RAD	4516
B32522C3155M000 TDK EPCOS	CAP FILM 1.5UF 20% 250VDC RADIAL	0
B32671P4224J289 TDK EPCOS	CAP FILM 0.22UF 5% 450VDC RADIAL	0
B32524Q6225K TDK EPCOS	CAP FILM 2.2UF 10% 400VDC RADIAL	40
B32672P6334K000 TDK EPCOS	CAP FILM 0.33UF 10% 630VDC RAD	0
B32021A3622M000 TDK EPCOS	CAP FILM 6200PF 20% 300VAC RAD	0
B32523Q1225J189 TDK EPCOS	CAP FILM 2.2UF 5% 100VDC RADIAL	0
B32529C1472K000 TDK EPCOS	CAP FILM 4700PF 10% 100VDC RAD	826
B32654A4155K000 TDK EPCOS	CAP FILM 1.5UF 10% 400VDC RADIAL	527
B32520C6473K189 TDK EPCOS	CAP FILM 0.047UF 10% 400VDC 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.