Is it necessary to derate a fuse for different temperatures?
Yes, it is necessary and a derating chart is found on every data sheet. Fuses have different current carrying capabilities at different temperatures so the derating factor must be taken into account at the design stage.
What is the maximum voltage a fuse can operate under?
The Vmax rating of the fuse is the maximum rating, and the voltage should never exceed this limit.
How should one select the proper fuse amperage?
The fuse rating should be selected based on 125 % of the circuit's full load current.
Fuses are RoHS compliant but do they contain any lead?
Yes, the fuses contain approximately 42 PPM of lead, which is well under the 1000 PPM specified in the RoHS* directive.
What is the resistance tolerance?
Resistance is dynamic as it is a function of temperature. A typical value is provided on every data sheet, which is measured at a current level less than 10 % of the rated current.
What is opening time versus fault current chart?
Again, this is dynamic as the higher the current the faster the device will open. A chart illustrating this is provided on every data sheet.