Film Capacitors

Image Part Number Description / PDF Quantity Rfq
ECQ-E2274KFW

ECQ-E2274KFW

Panasonic

CAP FILM 0.27UF 10% 250VDC RAD

0

ECQ-UAAV184SA

ECQ-UAAV184SA

Panasonic

CAP FILM 0.18UF 20% 310VAC RAD

0

ECQ-E2124KB

ECQ-E2124KB

Panasonic

CAP FILM 0.12UF 10% 250VDC RAD

923

ECQ-E4334KF

ECQ-E4334KF

Panasonic

CAP FILM 0.33UF 10% 400VDC RAD

47

ECQ-UAAV394S1

ECQ-UAAV394S1

Panasonic

CAP FILM 0.39UF 20% 310VAC RAD

0

ECQ-UAAF683MA

ECQ-UAAF683MA

Panasonic

CAP FILM 0.068UF 20% 275VAC RADI

0

ECW-FG70475J

ECW-FG70475J

Panasonic

CAP FILM 4.7UF 700VDC RADIAL

99

ECQ-E2123KB

ECQ-E2123KB

Panasonic

CAP FILM 0.012UF 10% 250VDC RAD

1973

ECQ-E6154KF3

ECQ-E6154KF3

Panasonic

CAP FILM 0.15UF 10% 630VDC RAD

0

ECW-FG80605JA

ECW-FG80605JA

Panasonic

CAP FILM 6.0UF 800VDC RADIAL

0

EZP-E80206MTA

EZP-E80206MTA

Panasonic

CAP FILM 20UF 10% 800VDC RADIAL

82

ECW-FG80225JA

ECW-FG80225JA

Panasonic

CAP FILM 2.2UF 800VDC RADIAL

0

ECW-F2824HAB

ECW-F2824HAB

Panasonic

CAP FILM 0.82UF 3% 250VDC RADIAL

0

ECH-U1H332JB5

ECH-U1H332JB5

Panasonic

CAP FILM 3300PF 5% 50VDC 1206

6147

ECW-FD2W125K

ECW-FD2W125K

Panasonic

CAP FILM 1.2UF 10% 450VDC RADIAL

857

ECQ-E1154KF

ECQ-E1154KF

Panasonic

CAP FILM 0.15UF 10% 100VDC RAD

11450

ECQ-E4563KZ

ECQ-E4563KZ

Panasonic

CAP FILM 0.056UF 10% 400VDC RAD

713

ECQ-U3A104MG

ECQ-U3A104MG

Panasonic

CAP FILM 0.1UF 20% 300VAC RADIAL

0

ECQ-E6564JFW

ECQ-E6564JFW

Panasonic

CAP FILM 0.56UF 5% 630VDC RADIAL

0

ECH-U1H183GB5

ECH-U1H183GB5

Panasonic

CAP FILM 0.018UF 2% 50VDC 1210

1625

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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