We use cookies to provide our visitors with an optimal site experience. View our privacy notice and cookie notice to learn more about how we use cookies and how to manage your settings. By proceeding on our website you consent to the use of cookies.
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.