Showing posts with label capacitors-3. Show all posts
Showing posts with label capacitors-3. Show all posts

Friday, June 10, 2011

WIMA - Specialized and Custom Capacitors

Wilhelm Westermann in Unna/Westphalia in 1948 created and established WIMA Germany. They make High Technology, Specialized Passive Components. These are Plastic film capacitors, Paper capacitors and Supercapacitors.


GTO Capacitors - WIMA


WIMA - Specialized and Custom Capacitors


The capacitors that need special mention are RFI and Snubber Capacitors. They also make Intermediate Circuit Capacitors or DC-Link capacitors, that can replace Electrolytics in SMPS or DC/AC Drives.


These capacitors are especially designed to attenuate voltage spikes on GTO (Gate-Turn-Off) Thyristors and IGBT (Insulated Gate Bipolar Transistor). They are manufactured in dry-type technology with a dielectric of metalized polypropylene film and encapsulated in a cylindrical plastic case sealed with self-extinguishing polyurethane resin.


These caps have Very low self-inductance and High pulse reliability (snubber). High rms current carrying capability (HF filter). Value Ratings upto 100uF and 1KV available.


SuperCapacitors - WIMA


GTO Capacitors - WIMA


The Double Layer Capacitors developed by WIMA are storage capacitors with highest capacitance values in the Farad range. They are among others suited to serve as batteries, can deliver considerably higher currents for a short time, however, and are maintenance free.


SuperCapacitors - WIMA


Despite the limitations of its maximum operating voltage of 2.5 V, several cells can be built up to enormous capacitance of the desired voltage by means of series or parallel connection (cascade). When cascading SuperCaps, the voltage of single cells must not exceed 2.5 V (decomposition of the electrolyte!)

Wednesday, December 8, 2010

Film Capacitors - Electronic Concepts

Manufactures both the standard product lines and custom needs. Film capacitor design and manufacture. Products include Polypropylene Hi-Energy Density DC Filter Capacitors and Medium Power Film High-Energy Density DC Filter Capacitor in place of Electrolytics in some Applications.



5MP2 Series Metallized Polypropylene

Film Capacitors - Electronic Concepts



Others are Metallized Polypropylene which are Superior to other AC Capacitors because of low loss dry film construction; Polystyrene and Metallized Polycarbonate Capacitors.



5MP2 Series Metallized Polypropylene



Switching power supply capacitors that require snubber and high current applications. Voltage: 400 to 2000VDC: Capacitance as high as l0.0µf; ESR as low as 0.005OHMS; ESL as low as 18nH; RMS current to 48.4amps; UL94-VO flame retardant; three configuratio



Electronic Concepts, Inc.

P.O. Box 1278, 526 Industrial Way W., Eatontown, New Jersey 07724 USA

Thursday, August 12, 2010

Passive Components from NIC

Designer, manufacturer and worldwide supplier of passive components.



Hybrid Aluminum Electrolytic Capacitors

Passive Components from NIC

 

Products Include - Aluminum Electrolytic Capacitors, Tantalum Capacitors, Ceramic Capacitors, DC Film Capacitors, Thick and Thin Film Resistive Products and Magnetics like Power Inductors, Ferrite Chip Bead etc.



Hybrid Aluminum Electrolytic Capacitors

 

NSPE-Z series hybrid construction aluminum electrolytic capacitors featuring longer life in reduced case sizes, for use in portable, handheld and reduced clearance applications.



Capacitance values from 10uF to 330uF, voltage ratings from 25VDC to 63VDC over operating temperature range of -55°C to +125°C. Low ESR and high ripple current ratings.



Safety Capacitors from NIC

Safety Capacitors from NIC

Capacitors - X2 Safety Class

Interference Suppression Film Capacitors; Diodes and Fuses; Varistors - Transient Voltage Suppressors.

Johanson Technology - RF Ceramic Components

JTI specializes in the design and manufacture of high quality ceramic components for RF/Wireless and Microwave applications.

GPS SMD Chip Antenna - Johanson Technology



Johanson Technology - RF Ceramic Components


  • Integrated Passives

  • High-Q Multi-Layer Capacitors

  • RF Ceramic Chip Inductors

  • Custom Thin Film Metalized Substrates

  • Capacitor and Inductor Designer Kits


Seen on the right is a GPS SMD Chip Antenna



"2.4GHz High Rejection BPF with LGA-type terminations Due to the increasing interest in 1dBi+ gain satellite internal chip antennas that can operate in both GPS and GLONASS bands at the same time...."



JTIsoft Modeling Overview



 JTIsoft Modeling Overview



MLCsoft and MLIsoft provide highly detailed graphical plots of device performance data in two basic formats over a user specified frequency range. The chart displays are instantly updated as the user makes capacitance or frequency changes. Smith chart displays of both impedance and S11/S22 are available as point plots, line plots, and line-point plots.



Johanson Technology

4001 Calle Tecate, Camarillo, California 93012, USA.

Evans Capacitor - High Energy Density Caps

"Hermetically sealed Evans Hybrid Capacitor and Capattery devices have numerous patented features that provide demonstrated advantages over standard capacitor technologies."Capattery supercapacitor - Evans Capacitor


Evans Capacitor - High Energy Density Caps


"Evans maintains the highest levels of quality, and is fully compliant with ISO 9001 and AS9001 standards."


Technical Papers of Evans Capacitor


The Littlest Big Capacitor - An Evans Hybrid - Presented at the Fifth International Seminar on Double Layer Capacitors and Similar Energy Storage Devices, December 4-6, 1995


Capattery - SuperCapacitor


High energy density, up to 3 joules per cc, High reliability, 25 yrs., >1,000,000 cycles.

Maxwell - Energy and Power Delivery Solutions

Maxwell ultracapacitor products provide energy storage and power delivery solutions. Aerospace products and services include radiation‐hardened microelectronics like single board computers and components such as high‐density memory and power modules.



Maxwell - Energy and Power Delivery Solutions



The also manufacture special high‐voltage capacitors for long term reliability and environment ruggedness. Types are grading and coupling capacitors; capacitive voltage dividers.



"BOOSTCAP ultracapacitor cells and multi-cell packs and modules provide safe and reliable power solutions for applications in consumer and industrial electronics, transportation and telecommunications..."



The K2 Series ultracapacitors are a third generation design that provides 2.7 volt operating voltage while improving Maxwell's high performance and high reliability on a high volume manufacturing platform.



K2 Series High Capacity Cells - Maxwell



K2 Series High Capacity Cells - Maxwell

Some Features


  • 2.7 V operating voltage

  • Lowest RC time constant

  • Over 1,000,000 duty cycles

  • Ultra-low internal resistance




Maxwell Technologies, Inc.

3888 Calle Fortunada San Diego CA 92123 USA

Wednesday, November 4, 2009

Cornell Dubilier Electronics - Capacitors

Cornell Dubilier Electronics - Capacitors


Manufacturer of Aluminum electrolytic, polyester film, polypropylene film, mica, pulse, snubber, motor-run, motor-start and high voltage capacitors.


CDE History -


1909: William Dubilier replaces Leyden jars with his invention of the mica capacitor for radio transmission.


Capacitor Application Guides - CDE