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.

Riedon - High Precision Resistors

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


  • 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

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.

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.

Caddock High Performance Film Resistors

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