| ??? 08/29/08 11:09 Read: times |
#157850 - Polyswitches vs fuses Responding to: ???'s previous message |
Polyswitches are a thermal device and because of this, they are slow - they can take many 10's ms to react as they have to heat up. It also means their response is dependant on the ambient temperature.
With your test, I gather there was a capacitor on the 12VDC circuit - this makes the difference as to the amount of energy available to the polyswitch (peak vs RMS). So, yes, the polyswitch does react differently between AC and DC circuits. Sized and applied correctly, polyswitches are a great protection device but they take a little getting used to. |
| Topic | Author | Date |
| Polyswitch... | 01/01/70 00:00 | |
| First, what do you intend to protect? | 01/01/70 00:00 | |
| preemptive... | 01/01/70 00:00 | |
| AC vs DC | 01/01/70 00:00 | |
| Polyswitches vs fuses | 01/01/70 00:00 | |
| re polyswitches a 'trick' | 01/01/70 00:00 | |
| yes, but.... | 01/01/70 00:00 | |
| the \'thing\' will recover | 01/01/70 00:00 | |
| Again, what do you want to protect??? | 01/01/70 00:00 | |
| RFID device protection | 01/01/70 00:00 | |
Your transformer is much too weak... | 01/01/70 00:00 |