Film Capacitors

Part Number	Description / PDF	Quantity
ECW-F6823HL Panasonic	CAP FILM 0.082UF 3% 630VDC RAD	235
ECW-H6274HC Panasonic	CAP FILM 0.27UF 3% 630VDC RADIAL	682
ECH-U1C271JX5 Panasonic	CAP FILM 270PF 5% 16VDC 0603	0
ECW-FE2J105P5 Panasonic	CAP FILM 1UF 5% 630VDC RADIAL	798
ECW-U2104JC9 Panasonic	CAP FILM 0.1UF 5% 250VDC 2420	3280
ECQ-E2393JF9 Panasonic	CAP FILM 0.039UF 5% 250VDC RAD	0
ECQ-E6563KF Panasonic	CAP FILM 0.056UF 10% 630VDC RAD	912
ECQ-E2153KF Panasonic	CAP FILM 0.015UF 10% 250VDC RAD	975
ECW-F4245HL Panasonic	CAP FILM 2.4UF 3% 400VDC RADIAL	993
ECW-U2333JC9 Panasonic	CAP FILM 0.033UF 5% 250VDC 1913	647
ECQ-E2473JF Panasonic	CAP FILM 0.047UF 5% 250VDC RAD	2612
ECH-U1C122GX5 Panasonic	CAP FILM 1200PF 2% 16VDC 0603	21331
ECW-U4182V17 Panasonic	CAP FILM 1800PF 5% 400VDC 1913	5427
ECQ-E4273KF3 Panasonic	CAP FILM 0.027UF 10% 400VDC RAD	0
ECW-FD2J124JQ Panasonic	CAP FILM 0.12UF 5% 630VDC RADIAL	952
ECQ-UAAF184K Panasonic	CAP FILM 0.18UF 10% 275VAC RADIA	1990
ECW-F4274HL Panasonic	CAP FILM 0.27UF 3% 400VDC RADIAL	751
ECW-FD2W395K Panasonic	CAP FILM 3.9UF 10% 450VDC RADIAL	358
ECW-FA2J105JB Panasonic	CAP FILM 1UF 5% 630VDC RADIAL	0
ECH-U1H183JX5 Panasonic	CAP FILM 0.018UF 5% 50VDC 1210	3942

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.