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Which of the following device is NOT suitable for parallel operation?

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in Electric Drives by (99.8k points)
Which of the following device is NOT suitable for parallel operation?

(a) MOSFET

(b) BJT

(c) IGBT

(d) TRIAC

The question was asked in an internship interview.

I would like to ask this question from Modified Speed Torque Characteristics of DC Shunt Motors topic in division Characteristics of DC & AC Motors of Electric Drives

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Right choice is (b) BJT

Easy explanation: BJT has a negative temperature coefficient of resistance. If it is operated in parallel operation thermal run-away will take place and the device will damage.

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