Film Capacitors

Part Number	Description / PDF	Quantity
ECQ-E2183JB3 Panasonic	CAP FILM 0.018UF 5% 250VDC RAD	0
ECQ-E1106JFB Panasonic	CAP FILM 10UF 5% 100VDC RADIAL	0
ECQ-E6394JFB Panasonic	CAP FILM 0.39UF 5% 630VDC RADIAL	0
ECW-FD2W335KC Panasonic	CAP FILM 3.3UF 10% 450VDC RADIAL	0
EZP-Q38126LTB Panasonic	CAP FILM 12UF 5% 380VAC RADIAL	200
ECQ-UBAF272VA Panasonic	CAP FILM 0.0027UF 20% 300VAC RAD	0
ECQ-E6333KF9 Panasonic	CAP FILM 0.033UF 10% 630VDC RAD	0
ECH-U1H102GB5 Panasonic	CAP FILM 1000PF 2% 50VDC 0805	3041
ECQ-E6124KF3 Panasonic	CAP FILM 0.12UF 10% 630VDC RAD	0
ECH-U1H471JX5 Panasonic	CAP FILM 470PF 5% 50VDC 0805	5719
ECW-U1C274JC9 Panasonic	CAP FILM 0.27UF 5% 16VDC 2416	0
ECQ-E2684KF Panasonic	CAP FILM 0.68UF 10% 250VDC RAD	0
ECW-F2394RJA Panasonic	CAP FILM 0.39UF 5% 250VDC RADIAL	0
ECW-FE2W335P5 Panasonic	CAP FILM 3.3UF 5% 450VDC RADIAL	395
ECQ-UAAF474T1 Panasonic	CAP FILM 0.47UF 10% 275VAC RAD	1068
ECH-A22605JX Panasonic	CAP FILM 6UF 5% 220VAC RADIAL	302
ECQ-E2334JF Panasonic	CAP FILM 0.33UF 5% 250VDC RADIAL	1195
ECW-FD2W275JC Panasonic	CAP FILM 2.7UF 5% 450VDC RADIAL	0
ECW-U1333KC9 Panasonic	CAP FILM 0.033UF 10% 100VDC 1913	2995
ECH-U1H473JX9 Panasonic	CAP FILM 0.047UF 5% 50VDC 1913	10408

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.