Showing posts with label resistors. Show all posts
Showing posts with label resistors. Show all posts

Tuesday, December 13, 2011

Riedon - High Precision Resistors

Riedon has been providing original equipment manufacturers with high-precision, wirewound resistors and committed customer service since 1960.



Wirewound, Thick & Thin Film, and also Foil resistive products used in industries such as Industrial Automation, Aerospace, Military and Instrumentation.



Riedon - High Precision Resistors



Custom RTD elements, Power resistors as heating elements. Compensation Resistors, Metal and Thick Film networks and arrays.



These Precision Shunt Resistors are designed for systems which have a fast changing electrical load. It has a Heatsink and is encapsulated in epoxy. The substrate is Alumina for Good Heat Transfer but with Electrical Insulation. It is a Resistor formed by a NiCr Foil. (Like Nichrome).



Precision Resistors - UNS 4-T220 - Riedon



Precision Resistors - UNS 4-T220 - Foil NiCr - Riedon



Specifications


  • Resistance from 0.2 Ohm to 80 Ohms

  • Power Rating to 15 Watts

  • Resistance Tolerances to ±0.01%

  • TCR to ±1ppm/K

  • Load Stability to 0.01%


Resistors are probably the most common and well known of all electrical components. Applying a resistor to a circuit normally requires (1) calculating the nominal values needed in the circuit application (resistance, power rating, etc.) then (2) developing acceptable tolerances for the resistor that ensure it will function properly in all extremes of the application.



Read up the "Temperature dependence and TC" - The absolute ohmic value of a resistor is temperature-dependent. Also the "Definition of terms in the specifications of Resistors."



Riedon Inc

300 Cypress Avenue Alhambra, CA 91801, USA

Ohmcraft - Thick Film Resistors

These are surface mount resistors, the Resistive Element is Thick Film on Alumina Substrate. We can get Voltage Ratings upto 600 Volts and 50 Gigohms Values. Low noise high stability resistors.

Specialized in the design and manufacturing.of thick film, high voltage, high precision resistor . High voltage resistors and high value resistors.

Ohmcraft - Thick Film Resistors

Ohmcraft - Thick Film Resistors

SM Chip Resistors go to values in giga-ohms. The Technology - Micropenned serpentine patterned resistors, engineered for ultra precision.

SM Series High-Value Resistors - Ohmcraft

"Our patented Micropen precision printing technology provides ultra precision, thick-film high ohmic value, surface mount resistors. Ohmcraft’s Micropenned serpentine patterned resistors produce superior electrical characteristics:"

Ohmcraft ia a division of Micropen Technologies Corporation
93 Paper Mill St., Honeoye Falls, NY 14472

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.

Wednesday, May 5, 2010

SRT Resistor Technology and Passives

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.







Tera Giga Ohm HV Resistors - SRT Resistor Technology



Some Specs -


  • Resistance range 500 R - 100 T

  • Tolerances 1%, 2%, 5%, 10%

  • Temperature coefficient ± 20ppm/K - 150ppm/K

  • Temperature range -55°C - +225°C

  • Insulation Resistance 10000M min.


SRT Resistor Technology GmbH

Ostlandstrasse 31, 90556 Cadolzburg, Germany.

Monday, March 3, 2008

Caddock High Performance Film Resistors

Caddock Electronics, Inc. manufactures precision 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


Saturday, February 2, 2008

Vishay - Discrete Semiconductors and Passive Components

Manufacturers of discrete semiconductors like diode rectifiers, transistors, and optoelectronics and even some ICs.



Brands- BCcomponents, Dale. General Semiconductor, Spectrol, Sprague, Telefunken.



The passive electronic components like resistors, capacitors, inductors, sensors, and transducers are also in the main section of thier product portfolio.



Vishay - Discrete Semiconductors and Passive Components



"In the 1950s, patents were issued for the PhotoStress products developed by Dr. Felix Zandman. These products reveal and measure stress distribution in airplanes, cars, and other structures under live load conditions. .....



Dr. Zandman, with the financial support of Alfred P. Slaner, founded Vishay in 1962 to develop and manufacture Bulk Metal foil resistors. The Company was named after the village in Lithuania ........" Vishay History



PowerPAK SC-75 - Vishay Mosfet



PowerPAK SC-75 Mosfet - Vishay



Gives designers ultra-low on-resistance and ultra-small size in one device for saving power in space-constrained handheld applications 



Ultra-Low On-Resistance and Size. low on-resistance, N-channel RDS(on) as low as 19 mΩ, P-channel RDS(on) as low as 25.5 mΩ.



Ultra-thin profile, down to 0.6 mm, Single and dual n- and p-channel versions available, including devices with on-resistance ratings down to 1.2 V.

Wednesday, January 9, 2008

Ohmite Electronic components Power resistors







Ohmite Manufacturing Company has been a leading provider of resistors for high current, high voltage and high energy applications for over 80 years. Products includes wirewound, wire element, thick film, and ceramic composition resistors, in addition to variable voltage controls.



Ohmite Electronic components Power resistors



The products include Power resistors, Surface mount resistors, Rheostats etc..They also have chokes, shunts and heatsinks too. Variable Resistors or Potentiometers, Solid State power controls and SMD resistors are also avialable.



Super Mox Series – High Voltage Non Inductive Axial

Super Mox Series - High Voltage Non Inductive Axial

Highlights


  • High Voltage Non Inductive Axial

  • Power rating 3.8-20 watts

  • Resistance range 1K -50 gig; up to 1 Tera ohm available

  • 0.05%-10% Tolerance

  • TCR values as low as 10ppm

  • Up 90KV voltage handling

  • Non-Inductive design


(I used 100 Giga Ohm and 1 Tera Ohm Glass Encased Victoreen Resistors and an Electrometer from Princeton Applied Research to calibrate my Insulation Tester TeraOhm – delabs)