Electronic Components

Components, Parts and Materials used in Electronic Products. Boards, Kits, Tools and Equipment. Manufacturers and Distributors. Part of delabs Technologies

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Monday, November 4, 2019

Ultra High Resistance -Super Mox - Ohmite

High-voltage Super Mox resistors have been developed to meet the precision temperature stability requirements of high-accuracy and high-voltage systems.

Ultra High Resistance -Super Mox - Ohmite

Super Mox combines proprietary noninductive resistance system and design to achieve low temperature coefficient, low voltage coefficients, high stability and increased high operating voltages.

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
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.

(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)

Precision Resistors - UNS 4-T220 - Riedon

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 - 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%
Here are some documents that will build your awareness on how Resistors work and their Thermal behavior. These are from a firm called Riedon who design manufacture custom resistors and special resistors used in tight design requirements.

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

Friday, November 1, 2019

Shallco - Manufacturer of Switches Breakers

"Shallco was formed and incorporated by John S. Shallcross in June of 1967 with an attenuator product line acquired from Shallcross Manufacturing Company..."

Shallco - Manufacturer of Switches Breakers

Shallco snap-action switches comprise assemblies of electrically insulated stators and rotors as an integral assembly with a drive mechanism that indexes the rotors in 90 degree increments.

Snap-Action Power Switches

Snap-Action Power Switches

Features
  • Positions: 2 to 4, up to 12 poles
  • Double wiping contacts, low contact resistance
  • Current ratings to 200 amperes
  • Rapid make and break action
  • AC and DC switching
  • Many circuit variations available
Shallco, Inc.
308 Components Dr Smithfield NC 27577, USA