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I was thinking of using this resistor to limit inrush current in my 12V circuit. However, for 2 of these in series (so a total of 3 Ohm resistance), my inrush current is about 3.63A, i.e. ~40W for about 300 us.
Since the resistor itself is rated only for 10 W, I was wondering if it is appropriate to be used the way I described above. I was hoping to understand if there is a pulse rating that I can look at to determine whether this resistor can handle these pulses or of I need to look for a higher wattage resistor.
Thank you for your response! I did see that and I was wondering how I could apply it to my use-case. Specifically, I am not sure I fully understand the Appriase column entry for this test of +/-0.2%+0.05 Ohm.
Does this mean that after the Periodic-pulse Overload Test (IEC 60115-1 4.39), the resistance value increased by 0.05 Ohm (with a tolerance of +/- 0.2% of the original resistance value)?
The “appraise” column indicates the pass/fail criteria for evaluation. It indicates that applying the stresses indicated under “procedure” should not result in a change of resistance in either direction of more than (2% of value+0.05Ω).
Assuming the repetition rate (e.g. average power) is low, the resistor selection should be well within reason and perhaps even over-specified for pulses of ~1ms duration.
