DEE Electronics » Guides & References

Circuit Breaker and Supplementary Protectors Standards, Codes, Specifications and Terminology Guide

admin2 — Tue, 26 Jan 2010 17:01:23 +0000

Engineers protect their equipment with what they believe to be appropriate circuit protection. However, there is widespread misunderstanding of industry standards for circuit protection, and the meaning of terms such as “circuit breakers”, “supplementary protectors”, “circuit breakers for equipment” and “branch circuit protection”. In some cases, this confusion results in the specification of the wrong type of circuit protection, and increases the risk of overheating, premature failure and catastrophic faults.

We offer a FREE report that has been developed to provide a quick overview and reference guide with respect to the standards, codes, specifications, and terminology involved with circuit breakers and supplementary protectors.

If you would like a copy of this FREE report, please send an email to MyFeedback@dee-inc.com containing “Circuit Breakers and Protectors Standards and Terminology Guide” in the subject line, and be sure to include your contact information.

Julian Date Calendar Cheat Sheet Quick Reference Guide

admin2 — Fri, 11 Dec 2009 18:39:55 +0000

DEE has developed a very handy Julian Date Speed Calendar Quick Reference Guide that will save you a lot of time. This Julian date speed calendar is laminated, covers the entire calendar year, and is 8 1/2 x 11 so you can have it on your desk, post it near by, or keep it in your notebook. This Julian Date Calendar Quick Reference shows Julian Day, but also shows the Julian Weeks as well.

Have you ever had a situation where you wanted to quickly find the exact date that is 54 days away, or quickly and easily find the date in the future that is exactly 14 weeks from today? This Julian Date quick reference guide makes these situations fast and easy.

If you would like a FREE Copy of our Julian Date Quick Reference Calendar, just send an email to MyFeedback@dee-inc.com, put in a Subject of “Julian Date Quick Reference Guide”, and provide your contact information.

Six Sigma Buzzword Quick Reference Guide

admin2 — Tue, 01 Dec 2009 01:49:44 +0000

DEE has put together a comprehensive and very handy Six Sigma Reference Guide. We talk to many folks who wish they had an easy-to-read quick reference guide to Manufacturing Six Sigma buzzwords, terminology, and concepts. So, we created one with all the Six Sigma knowledge we have accumulated over the years. If you would like a FREE Copy of this Six Sigma Quick Reference Buzzword Guide, just send an email to MyFeedBack@dee-inc.com, put “Six Sigma Buzzword Reference Guide’ in the Subject, and provide your contact information.

Cool Free Weights – Lengths – Volume – Area – Speed – Temperature – Pressure Conversion Reference Guide

admin2 — Wed, 28 Oct 2009 17:34:11 +0000

Dee has created a nice handy conversion reference guide that’s got all the information you typically need to reference. If you would like a free copy of this guide, just send an email to MyFeedback@dee-inc.com containing “Conversion Reference Guide” in the subject line, and include all your contact information. For additional complimentary offers from DEE, please follow this link!

“Capacitor and Resistor Code” Cheat Sheet Guide

admin2 — Tue, 21 Jul 2009 14:53:09 +0000

The electronic color code discussed here is used to indicate the values or ratings of electronic components, very commonly for resistors, but also for capacitors. The electronic color code was developed in the early 1920s by the Radio Manufacturer’s Association, (now part of Electronic Industries Alliance), and was published as EIA-RS-279. The current international standard is IEC 60062.

Colorbands were commonly used (especially on resistors) because they were easily printed on tiny components, decreasing construction costs. However, there were drawbacks, especially for color blind people. Overheating of a component, or dirt accumulation, may make it impossible to distinguish brown from red from orange. Advances in printing technology have made printed numbers practical for small components, which are often found in modern electronics.

Resistor values are always coded in ohms, capacitors in picofarads (pF). The standard color code per EN 60062:2005 is as follows:

band A is first significant figure of component value
band B is the second significant figure
band C is the decimal multiplier
band D if present, indicates tolerance of value in percent (no color means 20%)

For example, a resistor with bands of yellow, violet, red, and gold will have first digit 4 (yellow in table below), second digit 7 (violet), followed by 2 (red) zeros: 4,700 ohms. Gold signifies that the tolerance is ±5%, so the real resistance could lie anywhere between 4,465 and 4,935 ohms. All coded components will have at least two value bands and a multiplier; other bands are optional.

If you have interest in receiving a copy of this Free Cheat Sheet guide, just send an email to MyFeedback@dee-inc.com containing “Resistor/Capacitor Guide” in the subject line, and include your contact information.