Film Capacitors

Part Number	Description / PDF	Quantity
MRC440V12R5 NTE Electronics, Inc.	CAP FILM 12.5UF 6% 440VAC RADIAL	24
MRRC440V25 NTE Electronics, Inc.	CAP FILM 25UF 6% 440VAC RADIAL	32
MLR123K50 NTE Electronics, Inc.	CAP FILM 0.012UF 10% 50VDC RAD	2219
MRRC440V65 NTE Electronics, Inc.	CAP FILM 65UF 6% 440VAC RADIAL	24
CFC-2 NTE Electronics, Inc.	CAP-CEILING FAN 2UFD	66
MLR472K630 NTE Electronics, Inc.	CAP FILM 4700PF 10% 630VDC RAD	135
MLR124K250 NTE Electronics, Inc.	CAP FILM 0.12UF 10% 250VDC RAD	7907
MLR394K400 NTE Electronics, Inc.	CAP FILM 0.39UF 10% 400VDC RAD	10
MLR273K630 NTE Electronics, Inc.	CAP FILM 0.27UF 10% 630VDC RAD	6892
CFC-3 NTE Electronics, Inc.	CAP-CEILING FAN50V 3UFD2	616
MLR684K100 NTE Electronics, Inc.	CAP FILM 0.68UF 10% 250VDC RAD	675
MLR152K100 NTE Electronics, Inc.	CAP FILM 1500PF 10% 100VDC RAD	75
MLR333K100 NTE Electronics, Inc.	CAP FILM 0.033UF 10% 100VDC RAD	1405
MLR823K250 NTE Electronics, Inc.	CAP FILM 0.08UF 10% 250VDC RAD	7260
MRC440V60 NTE Electronics, Inc.	CAP FILM 60UF 6% 440VAC RADIAL	6
MRC440V5 NTE Electronics, Inc.	CAP FILM 5UF 6% 440VAC RADIAL	56
MRC440V7R5 NTE Electronics, Inc.	CAP FILM 7.5UF 6% 440VAC RADIAL	24
MRC440V20 NTE Electronics, Inc.	CAP FILM 20UF 6% 440VAC RADIAL	20
MRRC440V60 NTE Electronics, Inc.	CAP FILM 60UF 6% 440VAC RADIAL	50
MLR225K250 NTE Electronics, Inc.	CAP FILM 2.2UF 10% 250VDC RADIAL	14

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.