Film Capacitors

Part Number	Description / PDF	Quantity
R413I233040M1M KEMET	CAP FILM 0.033UF 20% 1KVDC RAD	1314
R46KN4150JHP1M KEMET	CAP FILM 1.5UF 20% 560VDC RADIAL	396
C4AQOBU4700M1EJ KEMET	CAP FILM 7UF 5% 900VDC RADIAL	0
R46KI315000P0M KEMET	CAP FILM 0.15UF 20% 560VDC RAD	0
R474W418050A1KV057 KEMET	CAP FILM 1.8UF 10% 1KVDC RADIAL	0
MMK5223J100J01L4BULK KEMET	CAP FILM 0.022UF 5% 100VDC RAD	1999
PME271YD5470MR30 KEMET	CAP FILM 0.047UF 20% 1KVDC RAD	857
RSBPC1100AA00J KEMET	CAP FILM 1000PF 5% 630VDC RADIAL	68
C4AQQEW5650A3BJ KEMET	CAP FILM 65UF 5% 1.1KVDC RAD	0
PHE450KA5100JR05 KEMET	CAP FILM 10000PF 5% 400VDC RAD	948
C4AQLEW6210A3BK KEMET	CAP FILM 210UF 10% 500VDC RADIAL	0
C4DEIPQ6140A8TK KEMET	CAP FILM 140UF 10% 800VDC RADIAL	8
R75TI227050H3J KEMET	CAP FILM 0.027UF 5% 1.6KVDC RAD	489
LDECA2220MA0N00 KEMET	CAP FILM 0.022UF 20% 50VDC 1206	0
PFR5682J63J11L4BULK KEMET	CAP FILM 6800PF 5% 63VDC RADIAL	112
MMK5332K100J01L4BULK KEMET	CAP FILM 3300PF 10% 100VDC RAD	0
C4AQJEW6110M3AJ KEMET	CAP FILM 110UF 5% 700VDC RADIAL	0
C44PRGR5680RASK KEMET	CAP FILM 68UF 10% 1.4KVDC RADIAL	3
C4AQSEW5320A3AJ KEMET	CAP FILM 32UF 5% 1.5KVDC RAD	0
LDEED3330JA5N00 KEMET	CAP FILM 0.33UF 5% 100VDC 2220	1721

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.