When to Dearte a Transistor

Copied another page on how to derate a transistor into two other pages that used the same derating chart.

2N4237 Temperature-Power Derating Curve, duplicated to.

2N4238 Derating Graph.

2N4239 Derating Graph.

A few other related pages in the section were also updated

2N3498 Derating Graph.

2N2906 Derating Graph.

2N3634 Derating Graph.

Some of these preexisting pages may not have ever been listed out here as new pages, so this may be their first posting. In any case it's yet another external link generated.

There are three different possible guidelines a designer can use when implementing a transistor circuit. 

1. The engineer may use a generic guideline using a simple Derating Factor;

     Example: Derate 50% up to a maximum junction temperature [Derating Factors].

2. The engineer may use a Linear equation which is more a design recommendation;

     Example: Derate Linearly at 12.7mW/ degree C, above 25C [Derating Recommendations].

3. The engineer may use a Temperature-Power Curve which should be treated as a design rule;

     Shown on any number of pages, [Derating Rules].

There were two other pages up-dated to hold the links for the page just generated;

Guideline to Derating Transistors, and Guideline to Derating NPN BJTs.

Addtional related pages on the web site:

Manufacturers of Transistors.

Transistor Amplifier  Circuits.

Transistor Circuit Schematics.

Transistor Multivibrator Circuit Schematics.

Definition of Transistor Terms.

Additional related pages on this blog:

Rules for Derating a Transistor.

Transistor Derating Guidelines.

Recommendation on how to Derate a Transistor.

Derate a BJT by Temperature.

FET Derating Guidelines.

NPN Transistor Derating Curve.

Power Derating for Transistors.