Spire Powerfuse S162

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To test this item I needed a way of creating a surge simulation. I achieved this by using a laboratory power supply with a variable voltage selector. I connected the power supply to the correct 12-volt pins on the PowerFuse and started by delivering a 12-volt charge to the device and seeing what voltage came out of the other side. As I predicted it came out as a 12-volt charge. The test was then repeated with more voltages up to 15 volts; I thought better not use 16 volts as the lab packs have a greater degree of inaccuracy when dealing with higher voltages.

To take measurements I used a digital voltmeter.


Input voltage (V) Output voltage (V)
12V 12V
13V 12V
14V 12.2V
15V 12.3V

The results are conclusive, the PowerFuse works in reducing the voltage to an acceptable amount but does it really protect against a sudden high voltage surge? The fuse as I have already said has a threshold of 3-5 seconds and if the surge was to be of say 30 volts for more than a few seconds, the output from the PowerFuse may follow the trend of being over 12 volts of output which could cause serious damage to your graphics card.

I admit this method for testing is a little unorthodox but surging a power supply that is connected to a computer is both difficult to do and dangerous. I must also state that the power supply unit that I used does not have the accuracy I would have liked as the output voltage selected is not always the same as the actual voltage out.


Unfortunately I was unable to find this item at any retail outlets to give a guide price for it. If anyone knows of how much this item goes for, please let me know and I will update the review.

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Last modified: February 15, 2011

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