Film Capacitors

Part Number	Description / PDF	Quantity
ECH-U1C392GX5 Panasonic	CAP FILM 3900PF 2% 16VDC 0805	1091
ECW-U1123JC9 Panasonic	CAP FILM 0.012UF 5% 100VDC 1913	4873
ECW-FG70475K Panasonic	CAP FILM 4.7UF 700VDC RADIAL	100
ECW-U1474KCV Panasonic	CAP FILM 0.47UF 10% 100VDC 3022	350
ECQ-E2124KF9 Panasonic	CAP FILM 0.12UF 10% 250VDC RAD	0
ECQ-UBAF473MA Panasonic	CAP FILM 0.047UF 20% 300VAC RADI	0
ECQ-UAAF154SA Panasonic	CAP FILM 0.15UF 20% 275VAC RAD	1283
ECW-FE2J155KA Panasonic	CAP FILM 1.5UF 10% 630VDC RADIAL	0
ECW-FE2J154K Panasonic	CAP FILM 0.15UF 10% 630VDC RAD	871
ECQ-E2473JF3 Panasonic	CAP FILM 0.047UF 5% 250VDC RAD	0
ECW-HC3B104JA Panasonic	CAP FILM 0.1UF 5% 1.25KVDC RAD	822
ECH-U1C153JX5 Panasonic	CAP FILM 0.015UF 5% 16VDC 1206	6290
ECQ-E6393KF3 Panasonic	CAP FILM 0.039UF 10% 630VDC RAD	0
ECQ-E4224JF3 Panasonic	CAP FILM 0.22UF 5% 400VDC RADIAL	0
ECQ-E2335KF Panasonic	CAP FILM 3.3UF 10% 250VDC RADIAL	1050
ECQ-E2224JF9 Panasonic	CAP FILM 0.22UF 5% 250VDC RADIAL	0
ECW-U1394KCV Panasonic	CAP FILM 0.39UF 10% 100VDC 3022	925
ECQ-E6185KFB Panasonic	CAP FILM 1.8UF 10% 630VDC RADIAL	0
ECW-FG80405JA Panasonic	CAP FILM 4.0UF 800VDC RADIAL	0
ECW-FA2J824J Panasonic	CAP FILM 0.82UF 5% 630VDC RADIAL	185

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.