Film Capacitors

Part Number	Description / PDF	Quantity
R75PI31004030J KEMET	CAP FILM 0.1UF 5% 630VDC RADIAL	7
C4AQLBU5140M18K KEMET	CAP FILM 14UF 10% 500VDC RADIAL	0
PFR5332H100J12L4BULK KEMET	CAP FILM 3300PF 2.5% 100VDC RAD	504
C4AQQLW5100A36J KEMET	CAP FILM 10UF 5% 1.1KVDC RADIAL	55
C44PRGR6150RASK KEMET	CAP FILM 150UF 10% 1.4KVDC RAD	4
C878AF35120AA0J KEMET	CAP FILM 12UF 5% 470VAC RADIAL	415
R46KN333045N0K KEMET	CAP FILM 0.33UF 10% 560VDC RAD	0
R76QF1100SE00J KEMET	CAP FILM 1000PF 5% 1KVDC RADIAL	11240
R46KR447040M2M KEMET	CAP FILM 4.7UF 20% 560VDC RADIAL	231
PHE426PB6100JR06 KEMET	CAP FILM 0.1UF 5% 1KVDC RADIAL	490
R413I21504000M KEMET	CAP FILM 0.015UF 20% 1KVDC RAD	1800
R76QI23304040J KEMET	CAP FILM 0.033UF 5% 1KVDC RADIAL	1455
LDEID2680JA5N00 KEMET	CAP FILM 0.068UF 5% 250VDC 2220	2572
R60PF1470AA30J KEMET	CAP FILM 4700PF 5% 630VDC RAD	1884
PHE844RD6100MR06L2 KEMET	CAP FILM 0.1UF 20% 1KVDC RADIAL	134
R73TI16804000J KEMET	CAP FILM 6800PF 5% 1.6KVDC RAD	6
P278EJ104M480A KEMET	CAP FILM 0.1UF 20% 480VAC RADIAL	0
PHE850EA4470MA03R17T0 KEMET	CAP FILM 4700PF 20% 1.25KVDC RAD	2040
R75PI3330AA30J KEMET	CAP FILM 0.33UF 5% 630VDC RADIAL	84
R82DC3470DQ60M KEMET	CAP FILM 0.47UF 20% 63VDC RADIAL	2500

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.