Film Capacitors

Part Number	Description / PDF	Quantity
PMZ2035RE6100K150R30 KEMET	CAP FILM 0.1UF 10% 1KVDC RADIAL	434
R46KI3100DQM1M KEMET	CAP FILM 0.1UF 20% 560VDC RADIAL	1176
R76QW412050H3J KEMET	CAP FILM 1.2UF 5% 1KVDC RADIAL	72
C4AQIEW5850A3AJ KEMET	CAP FILM 85UF 5% 800VDC RADIAL	54
MMK5334K50J01L4BULK KEMET	CAP FILM 0.33UF 10% 50VDC RADIAL	1710
C4AEQBU4330A11J KEMET	CAP FILM 3.3UF 5% 1.1KVDC RADIAL	205
R82MC1100Z350K KEMET	CAP FILM 1000PF 10% 400VDC RAD	600
C878AF24500AA1J KEMET	CAP FILM 5UF 5% 470VAC RADIAL	0
P295BE102M500A KEMET	CAP FILM 1000PF 20% 500VAC RAD	1467
R75TR32204040J KEMET	CAP FILM 0.22UF 5% 1.6KVDC RAD	361
C4BSPBX3680ZBFJ KEMET	CAP FILM 0.68UF 5% 1.2KVDC SCREW	0
PHE844RF6470MR06L2 KEMET	CAP FILM 0.47UF 20% 1KVDC RADIAL	245
PHE450MA5100JR05 KEMET	CAP FILM 10000PF 5% 630VDC RAD	4370
R413I222000M1M KEMET	CAP FILM 0.022UF 20% 1KVDC RAD	44562
R82MC1220DQ50J KEMET	CAP FILM 2200PF 5% 400VDC RAD	0
R75II368050H4J KEMET	CAP FILM 0.68UF 5% 250VDC RADIAL	489
R46KI3100JBM1M KEMET	CAP FILM 0.1UF 20% 560VDC RADIAL	35660
C44UHGT7100M84K KEMET	CAP FILM 1000UF 10% 600VDC RAD	0
878BF24500AA1J KEMET	CAP FILM 5UF 5% 470VAC RADIAL	458
R82DC3100Z350K KEMET	CAP FILM 0.1UF 10% 63VDC RADIAL	2033

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.