Film Capacitors

Image Part Number Description / PDF Quantity Rfq
ECW-FE2J684J

ECW-FE2J684J

Panasonic

CAP FILM 0.68UF 5% 630VDC RADIAL

590

ECQ-E2105RKB

ECQ-E2105RKB

Panasonic

CAP FILM 1UF 10% 250VDC RADIAL

0

ECQ-E2333JF3

ECQ-E2333JF3

Panasonic

CAP FILM 0.033UF 5% 250VDC RAD

0

ECW-U2393KC9

ECW-U2393KC9

Panasonic

CAP FILM 0.039UF 10% 250VDC 2416

2530

ECH-U1C392JB5

ECH-U1C392JB5

Panasonic

CAP FILM 3900PF 5% 16VDC 0805

1906

ECW-FE2J154P5

ECW-FE2J154P5

Panasonic

CAP FILM 0.15UF 5% 630VDC RADIAL

900

ECQ-E4823RKF

ECQ-E4823RKF

Panasonic

CAP FILM 0.082UF 10% 400VDC RAD

0

ECQ-E6155JFW

ECQ-E6155JFW

Panasonic

CAP FILM 1.5UF 5% 630VDC RADIAL

0

ECQ-E2275JFW

ECQ-E2275JFW

Panasonic

CAP FILM 2.7UF 5% 250VDC RADIAL

0

ECQ-E6123KF3

ECQ-E6123KF3

Panasonic

CAP FILM 0.012UF 10% 630VDC RAD

0

ECQ-E4154JFB

ECQ-E4154JFB

Panasonic

CAP FILM 0.15UF 5% 400VDC RADIAL

0

ECW-F2334HAB

ECW-F2334HAB

Panasonic

CAP FILM 0.33UF 3% 250VDC RADIAL

0

ECQ-UAAF475LD

ECQ-UAAF475LD

Panasonic

CAP FILM 4.7UF 20% 275VAC RADIAL

150

ECQ-E6563KFW

ECQ-E6563KFW

Panasonic

CAP FILM 0.056UF 10% 630VDC RAD

0

ECW-F2125JAB

ECW-F2125JAB

Panasonic

CAP FILM 1.2UF 5% 250VDC RADIAL

0

ECQ-E1395JFB

ECQ-E1395JFB

Panasonic

CAP FILM 3.9UF 5% 100VDC RADIAL

0

EZP-Q38226MTA

EZP-Q38226MTA

Panasonic

CAP FILM 22UF 5% 380VAC RADIAL

189

ECQ-UBAF333V6

ECQ-UBAF333V6

Panasonic

CAP FILM 0.033UF 10% 300VAC RADI

0

ECW-U2682KC9

ECW-U2682KC9

Panasonic

CAP FILM 6800PF 10% 250VDC 1913

36

EZP-E1D206MTA

EZP-E1D206MTA

Panasonic

CAP FILM 20UF 10% 1.3KVDC RADIAL

28

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:

  1. Determine required capacitance and voltage ratings with safety margins
  2. Assess environmental conditions (temperature, humidity, vibration)
  3. Evaluate dielectric absorption and frequency response requirements
  4. Consider packaging constraints (through-hole vs. surface-mount)
  5. 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.

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