Film Capacitors

Part Number	Description / PDF	Quantity
R75RW412050H4J KEMET	CAP FILM 1.2UF 5% 1.25KVDC RAD	71
MMK5472K63J01L16.5TR18 KEMET	CAP FILM 4700PF 10% 63VDC RADIAL	2500
R463F310040M1M KEMET	CAP FILM 0.1UF 20% 630VDC RAD	3540
C276CC35100AA0J KEMET	CAP FILM 10UF 5% 470VAC RADIAL	59
LDBAA2270JC5N0 KEMET	CAP FILM 0.027UF 5% 16VDC 1206	0
R46KI26805001K KEMET	CAP FILM 0.068UF 10% 560VDC RAD	0
C274AC35250AA0J KEMET	CAP FILM 25UF 5% 470VAC RADIAL	2
R76TI14704040J KEMET	CAP FILM 4700PF 5% 1.6KVDC RAD	1490
R474N327050A1KV057 KEMET	CAP FILM 0.27UF 10% 1KVDC RADIAL	0
C274AC35400SA0J KEMET	CAP FILM 40UF 5% 470VAC RADIAL	0
R75MW515050H3J KEMET	CAP FILM 15UF 5% 400VDC RADIAL	53
R73UI11504000J KEMET	CAP FILM 1500PF 5% 2KVDC RADIAL	673
R71QR41004010K KEMET	CAP FILM 1UF 10% 1KVDC RADIAL	0
R46KI315040P0M KEMET	CAP FILM 0.15UF 20% 560VDC RAD	999
R463I347040M1M KEMET	CAP FILM 0.47UF 20% 630VDC RAD	245
PHE426MJ4100JR05 KEMET	CAP FILM 1000PF 5% 630VDC RADIAL	0
LDBCA1470GC5N0 KEMET	CAP FILM 4700PF 2% 50VDC 1206	0
R73TI14704000J KEMET	CAP FILM 4700PF 5% 1.6KVDC RAD	0
R82EC2220SH50J KEMET	CAP FILM 0.022UF 5% 100VDC RAD	5420
SMR5223J63J01L16.5CBULK KEMET	CAP FILM 0.022UF 5% 63VDC RADIAL	281

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.