The heat sink of the BU205 transistor can be connected ____

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RRB ALP CBT 2 Electronic Mechanic Previous Paper: Held on 23 Jan 2019 Shift 1
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  1. directly 
  2. through a mica sheet 
  3. directly and through the cap
  4. through the cap

Answer (Detailed Solution Below)

Option 2 : through a mica sheet 
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Detailed Solution

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  • Heat is produced in transistors due to the current flowing through them.
  • If the transistor becomes too hot then a heat sink is required to dissipate the extra heat to the surroundings. 
  • Insulating kits are available with a mica sheet and a plastic sleeve for the bolt.
  • Mica sheets are sometimes used to provide electrical insulation between transistor and heat sink. 
    • BU205 is a device used to perform on specified inputs, to switch the forces of electrons.
    • The unique design of this transistor includes individual electrons bouncing from wedge-shaped obstacles called deflectors.
    • It is used in horizontal deflection output stages for color TV receivers. 
    • The collector is the body of the transistor and two pins are the emitter and the base. 
    • It has a low saturation voltage. It has a high safe operating area and it is easy to carry and handle. 

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