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| OK to use 1N4148 100V-max diode to suppress relay coil transients? |
| << < (5/5) |
| JDW:
If you look at some 1N4148 or 1N4148W data sheets, you will see that the 1N4148 can handle more continuous forward current then it’s SMD “W“ sibling. However, both variants of the diode can handle up to 2A (non- repetitive) for durations of up to 1.0 µs. and many data sheets say the diode can handle up to a 500 mA surge for a duration of 1 second. But that data varies wildly by datasheet. for example, I’ve seen some datasheets that say it can handle a surge of 1.0 amp for 1.0 seconds. Some say the surge is non-repetitive while others do not say that. |
| magic:
Depends on vendor. If you want to be really pedantic about it, find some diode with transient thermal impedance ratings. |
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