Wednesday, September 30, 2009

How to design guide for precision resistors

Even in this digital age, a number of measurement and instrumentation applications rely on the accuracy of the value of one or more resistors.

To guarantee the performance of the system, the designer must understand what factors can affect the value of a precision resistor, and how the combined effect of these factors may be evaluated.

There are essentially three types of error source to be understood. The first is measurement errors, which limit the precision with which the actual resistance value can be known. Secondly, short-term change factors, reflecting uncertainty in the resistance value in a customer's recently assembled PCB. Thirdly, long-term change factors, reflecting value drift throughout the product's life. The combination of all these factors is termed total excursion.

Continue to read here.
Or to buy a precision resistor visit our website, Riedon, Inc.

Monday, September 28, 2009

Do you have overvoltage surge problem??

Wirewound resistors, ideal at handling overvoltage surges, are often specified for the surge and overload conditions of harsh environments. The core of a wirewound resistor typically consists of fiberglass or a ceramic rod, with metallic wire wrapped around the substrate. While ceramic is more expensive, it acts as a heat sink and provides for an increase in efficiency as the surge event lengthens, whereas fiberglass provides little thermal benefit in overload situations.

There are several ways to increase the surge capability of a wirewound resistor. First, carefully selected longer lengths of larger diameter (lower resistance) wire can be tightly wound on the substrate. This leads to an increased resistance element mass. Additionally, the surge capability can be increased by using two layers of wire and winding them in opposite directions to reduce the resistor's inductance. Not only does this decrease the inductance, but it also increases the resistance wire mass, which in turn improves the resistor's surge handling capability.

Continue to read more about resistors and over-voltag issues here.

Thursday, September 24, 2009

Find Us At Digikey!

Did you know that you can buy our products at DigiKey? Here is the link : click Here.

Wednesday, September 23, 2009

Resistor Technology Comparison

Click on the image to see it in a larger size.

Monday, September 21, 2009

Riedon Resistors

Welcome to Riedon's first blog post. Through this blog we hope to support our customers, reps and distributors in ways no other resistor company has been able to do. We will be posting resistor news, new applications where our power and precision resistor are being used, success stories and general industry news.
The values we offer to our costumers are:

  • Immediate personalized technical support and problem solving
  • Flexible manufacturing systems enable us to support orders of just 100 resistors through to 1 million pieces with the same support and enthusiasm.
  • Custom application support and design, utilizing our global engineering and technical resources.
  • Industry best lead times!!!! without question

Power Resistors, Precision Resistors, High Voltage Resistors

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