Is this 150 mili-ohm 2-3 watts resistor?

[dontknwmucboutanythng]

Hello,

Is the resistor (circled red) in the attached image a 150 mili-ohm 2-3 watts (10mm in length, 3mm diameter) resistor?

Thanks.

[Benta]

0.15 ohm, yes, but no more than 1 W IMO.

[Vovk_Z]

It depends. It can be 1-2-3 W rated.

[TimFox]

For example, Dale RS-02M or C wirewound resistors have body lengths (excluding meniscus at the lead) of 12.7 mm +/- 1.6 mm and diameter 4.7 mm +/- 0.8 mm.
They are rated at 3.0 W and 2.5 W, respectively (depending on ambient conditions, etc.)
What are the dimensions of your part?
see  https://www.vishay.com/docs/30204/rsns.pdf

[DavidAlfa]

Probably to avoid  current spikes due the inductor's parasitic capacitance?
Seems 1W rating, but probably just for peak current capability, I don't think the design can safety disipate such power continuously without overheating or degrading, everything is pretty tight there.

[dontknwmucboutanythng]

The resistor's dimensions are 15mm x 4mm, from the table provided by Tim, it's a 3 watts part.

It connected to the source of the N-MosFET.  The MOSFET shorted and burned up the resistor, or was it the other way around? 

Anyway, the FET drove  an electroluminescence display (odometer, trip meter, etc) of a car's instrument panel.  The shorted FET took out a 10A automobile fuse, cut power to the instrument panel and disabled the car in the middle of the street.

I am thinking of installing a fast blow inline fuse with the resistor to protect power to the instrument panel but haven't a clue of what fuse rating to use.

Thanks for your thought.