Film Capacitors

Part Number	Description / PDF	Quantity
ECQ-E1275RKF Panasonic	CAP FILM 2.7UF 10% 100VDC RADIAL	0
ECQ-E6683KF Panasonic	CAP FILM 0.068UF 10% 630VDC RAD	4361
ECW-FG2J305P1 Panasonic	CAP FILM 3UF 5% 630VDC RADIAL	298
ECW-F4683JB Panasonic	CAP FILM 0.068UF 5% 400VDC RAD	310
EZP-Q33305LTA Panasonic	CAP FILM 3UF 5% 330VAC RADIAL	283
ECQ-E2183KBB Panasonic	CAP FILM 0.018UF 10% 250VDC RAD	0
ECW-H12272JV Panasonic	CAP FILM 2700PF 5% 1.25KVDC RAD	518
ECQ-E4824KFW Panasonic	CAP FILM 0.82UF 10% 400VDC RAD	0
ECW-FE2J684K Panasonic	CAP FILM 0.68UF 10% 630VDC RAD	580
EZP-V60106LTB Panasonic	CAP FILM 10UF 10% 600V RADIAL	219
ECW-U1154KC9 Panasonic	CAP FILM 0.15UF 10% 100VDC 2416	1702
ECH-U1C331GX5 Panasonic	CAP FILM 330PF 2% 16VDC 0603	11825
ECW-F2225JAB Panasonic	CAP FILM 2.2UF 5% 250VDC RADIAL	0
EZP-Q33286MTA Panasonic	CAP FILM 28UF 5% 330VAC RADIAL	200
ECH-U1H681GB5 Panasonic	CAP FILM 680PF 2% 50VDC 0805	2724
ECW-FE2W224QD Panasonic	CAP FILM 0.22UF 10% 450VDC RAD	1000
ECW-U1272JX5 Panasonic	CAP FILM 2700PF 5% 100VDC 1206	3681
ECQ-E6154RKF Panasonic	CAP FILM 0.15UF 10% 630VDC RAD	0
ECQ-E10154JF Panasonic	CAP FILM 0.15UF 5% 1KVDC RADIAL	0
ECQ-E6563JF Panasonic	CAP FILM 0.056UF 5% 630VDC RAD	948

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.