Film Capacitors

Part Number	Description / PDF	Quantity
ECQ-E6683JF3 Panasonic	CAP FILM 0.068UF 5% 630VDC RAD	0
ECQ-E6103JF Panasonic	CAP FILM 10000PF 5% 630VDC RAD	1991
ECW-U1563KC9 Panasonic	CAP FILM 0.056UF 10% 100VDC 1913	5339
ECQ-UAAF473K Panasonic	CAP FILM 0.047UF 10% 275VAC RADI	0
EZP-E45666MTB Panasonic	CAP FILM 66UF 15% 450VDC RADIAL	584
ECQ-E4684JF Panasonic	CAP FILM 0.68UF 5% 400VDC RADIAL	109
ECW-U2472JC9 Panasonic	CAP FILM 4700PF 5% 250VDC 1913	8107
ECW-FD2W275KB Panasonic	CAP FILM 2.7UF 10% 450VDC RADIAL	0
ECQ-E6103RJF Panasonic	CAP FILM 10000PF 5% 630VDC RAD	0
ECH-U1C473GX5 Panasonic	CAP FILM 0.047UF 2% 16VDC 1206	0
ECQ-E6823RKF Panasonic	CAP FILM 0.082UF 10% 630VDC RAD	2500
ECH-U1H151GX5 Panasonic	CAP FILM 150PF 2% 50VDC 0805	2689
ECQ-E1225KFB Panasonic	CAP FILM 2.2UF 10% 100VDC RADIAL	0
ECW-FG80505J Panasonic	CAP FILM 5.0UF 800VDC RADIAL	148
ECQ-UAAV105T1 Panasonic	CAP FILM 1.0UF 10% 310VAC RAD	600
ECQ-E2153JBB Panasonic	CAP FILM 0.015UF 5% 250VDC RAD	0
ECW-H16332JV Panasonic	CAP FILM 3300PF 5% 1.6KVDC RAD	340
ECW-F6125JL Panasonic	CAP FILM 1.2UF 5% 630VDC RADIAL	1411
ECW-FD2J154JQ Panasonic	CAP FILM 0.15UF 5% 630VDC RADIAL	903
ECQ-E2124RJF Panasonic	CAP FILM 0.12UF 5% 250VDC RADIAL	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.