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Category Archives: Passives

Resistors, Capacitors, Inductors, Magnetics, Varistors, Thermistors.

SRT Resistor Technology and Passives

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Development and production of high-grade resistors and special products, including the production equipment.

SRT Resistor Technology and Passives

High Value Resistors in Thick film technology is a Specialization. Products include precision and power resistors, special Ceramic Chip Capacitors, Temperature Sensors and other High Grade Passive Electronic Components.

SRT Resistor Technology and Passives

High Voltage in Small Size

In the expansion of the existing types of High Value and High Voltage resistor series, SRT is presenting at electronica 2006 under the designation HVR25 a leaded resistor, which has a working voltage of 15kV at a length of only 25mm.

By means of an optimized design for high working voltages, SRT has succeeded in realizing at this length and a width of 9 mm this improved version of High Voltage resistors. Compared with the type HVR30 with 30mm length, the working voltage could be increased by 5kV and the Voltage Coefficient (VCR) reduced by about 50%.

SRT Resistor Technology GmbH
Ostlandstrasse 31, 90556 Cadolzburg, Germany.

MAGNETICS – Ferrite Cores – Powder Cores

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They develop and manufacture soft magnetic components and materials. These are used in the Products in Power Electronics and RF Communications. A leading world supplier of precision, high permeability magnetic components and materials to the electronics industry.

MAGNETICS – Ferrite and Powder Cores

Product line include powder cores, ferrite cores, and strip wound cores for applications such as chokes, inductors, filters and transformers.

Learn More about Ferrite Cores

Made from MnZn, ferrite cores offer economical solutions for high frequency power transformers and inductors, EMC filters, and other applications.

MAGNETICS - Ferrite Cores - Powder Cores

Ferrites are dense, homogenous ceramic structures made by mixing iron oxide with oxides or carbonates of one or more metals such as zinc, manganese, nickel or magnesium.

Ferrite ETD Cores

ETD cores are an economical choice for transformers or inductors. ETDs offer a round centerpost for minimum winding resistance. Dimensions are optimized for power transformer efficiency. Typical applications of Magnetics ETD cores include differential mode inductors and power transformers.

MAGNETICS a division of Spang & Co

Magnetics Technology Center
110 Delta Drive Pittsburgh, PA 15238-0428, USA.

CWS – Magnetics Coils Inductors Transformers

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CWS provides full service from design, prototyping, pre-production run to volume production. They are experts in designing and manufacturing of magnetic components such as inductor, choke, coil and transformers. These magnetics are designed with ferrites, iron powder, MPP, sendust or high flux cores in all shapes and sizes.

CWS – Magnetics Coils Inductors Transformers

  • EMI / RFI, Inline Filters, Chokes
  • Power Magnetic
  • Inductors and Differential Mode Chokes
  • Electromagnetic Interference (EMI) Device
  • Power Line Reactor Coil
  • Antenna Coils

CWS - Magnetics Coils Inductors Transformers

Custom Design –

At CWS we understand that that common inductor coil or chokes need to be customized in order to provide top performance within a circuit. Our designers and engineers can provide the technology needed to ensure your coil can combat EMI issues and also interference with other circuits.

CWS Coil Winding Specialist
353 West Grove Ave Orange, California 92865

Murata Manufacturing – Electronic Components

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In the 1940s radio was an important means of communication. Super heterodyne radio used Murata’s tubular 500pf ceramic capacitors with  titanium oxide as dielectric material for temperature compensation.

Murata Manufacturing – Electronic Components

Products Include

Passive components like Capacitors, Resistors, Thermistors, Coils(Inductors), Delay Lines, Resonators, Noise Suppression Products and EMI Suppression Filters.

Audio Visual Parts like Spherical Speaker Products, Sound Components Filters, Modules for Audio Visual Equipment,

They also have Components and Modules for Communication Equipment. Special Sensors and Optical Products.

Murata Wireless Connectivity Products

Wireless Products –  Murata Wireless Connectivity Products and Platforms

Murata RF modules are designed to simplify wireless development and certification by minimizing the amount of RF expertise you need to wirelessly enable a wide range of applications.

Reasons for requiring EMI suppression filters

Chapter 1 describes the reasons for using EMI suppression filters, and explains how shields and filters used for electromagnetic noise suppression work.

Caddock High Performance Film Resistors

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Caddock Electronics, Inc. manufactures precision film resistors and resistor networks. Caddock uses unique resistance film technologies and process technologies to create solutions for performance demanding applications. They have High Resistance types in the Giga Ohm range and also Precision Types used in Analog Sections of Instrumentation.

Caddock High Performance Film Resistors

The product line consists of over 250 models, including high voltage resistors, current sense resistors, chip resistors, high frequency resistors, rf resistors, load resistors, pulse resistors, and non-inductive power resistors. Custom resistors and resistor network solutions are also available.

High Resistance Resistors from Caddock
Shown above are the High Resistance Resistors from Caddock – 1 Mega Ohms to 10 Giga Ohms

Products Include –

  • Non-Inductive Resistors, Power and Precision
  • Current Sense Resistors
  • Heat Sink Mountable Resistors (TO-220 and TO-126 Power Packages)
  • High Voltage Resistors
  • Low Temperature Coefficient Resistors (Low TC)
  • Ultra Precision Resistors
  • Surface Mount Power Resistors
  • Transient Tolerant Precision Resistors

Caddock Electronics, Inc.
1717 Chicago Ave., Riverside, CA 92507-2364

Richey Capacitor – Aluminum Electrolytic Capacitors

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They are in the manufacturing and marketing of aluminum electrolytic capacitors. They make electrolytic capacitors from SMT up to computer grade.

Richey Capacitor - Aluminum Electrolytic Capacitors

Richey Capacitor – Aluminum Electrolytic Capacitors

Richey offers a full line of capacitors including:

  • Aluminum Electrolytic Capacitors
  • Motor Run / Motor Start Capacitors
  • Film Capacitors

Richey is headquartered in Nashville, Tennessee where the company markets the capacitors manufactured by its affiliated factories located in Taiwan.

Richey Capacitor, Inc. –
1219 4th Avenue, South Nashville, TN. 37210, USA.

Coilcraft – Power Magnetics and RF Inductors

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Founded in 1945 Coilcraft  is a standard and custom coil manufacturer. They produce inductors for Industrial Segments like telecommunications, instrumentation and computers.

Coilcraft - Power Magnetics and RF Inductors

Coilcraft – Power Magnetics and RF Inductors

The types of products include Surface mount inductors,  xDSL magnetics,  Tunable and fixed RF inductors, and High frequency power magnetics.

Others are

  • Power Magnetics
  • EMI / RFI Filters
  • Broadband Magnetics
  • Surface mount power inductor

Coilcraft, Inc.
1102 Silver Lake Road, Cary IL 60013, USA