Understanding Transistor Data and Replacement

Written by Jestine Yong


Continued from page 1

Gain (hFE) The replacement should have a gain equal to or better thanrepparttar original and it should be as close torepparttar 138981 original specification as possible.

Gain-bandwidth (fT) repparttar 138982 replacement should have a transition frequency equal to or faster thanrepparttar 138983 original and it should be as close torepparttar 138984 original specification as possible.

Below is a table of application requirement and important specification that you can use for guidelines when comes to transistor substitution.

Application Requirement and Important Specifications 1. General purpose low level amplifier and switching transistors. Spec- hFE, IC (max), fT, VCEO 2. Power switching applications. Spec- VCEO, VCBO, hFE, IC (max), PD (max) 3. Low level IF/RF amplification. Spec- IC (max), fT, VCEO 4. Audio amplification. Spec- IC (max), PD (max), hFE, VCEO 5. High voltage transistors. Spec- VCEO, VCBO, IC (max), fT

Remember,repparttar 138985 replacement transistor should not run hot and if problem still persist, try another replacement number or getrepparttar 138986 original number if possible. Do not overlook thatrepparttar 138987 surrounding components also may causedrepparttar 138988 transistor to run hot even if original number is used.



Jestine Yong is a electronic repairer and a writer. For more repair information, please visit http://www.noahtec.com


Setting Up as a Electronic Repair Authorized Service Center

Written by Jestine Yong


Continued from page 1
Reception Area A proper reception area, neat and tidy workshop will reflect on them as well. First impression count a lot. Tools and Test Equipment The variety of tools and test equipment available will be taken into account. An oscilloscope, frequency counter, SMD rework station is a certain requirement. The work bench should be of decent size and comes with a fluorescent lighting. Employee There must be enough of employee to cope up withrepparttar work of repair.

Prolong or continuous delay of repair will make them to reconsider of changing to another service center.

To run an Authorized Service Center needs total dedication, but it will bring you into contact with a lot of people, some of who can be quite influential. It can also widenrepparttar 138980 product range that comes your way

Jestine Yong is a electronic repairer and a writer. For more repair information, please visit http://www.noahtec.com


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