Programming instructions

Fuse
 National Instruments Corporation 12-35 Multisim Component Reference Guide
12.6 Fuse
This is a resistive component that protects against power surges and current overloads.
A fuse will blow (open) if the current in the circuit goes above I
max
, the maximum current
rating. I
max
can have any value from mA to kA.
The fuse is modeled by a resistor, R.
12.6.1 Characteristic Equations
where:
i
a
= current through the fuse, in amperes
I
max
= maximum current rating of the fuse, in amperes.
For AC circuits, I
max
is the peak value of the current, not its RMS value.
12.6.2 Fuse Parameters and Defaults
RifiI
RifiI
a
a
=≤
=∞
>
0 max
max
Symbol Parameter Name Default Unit
Imax Maximum current 1 A
ComponentRef.book Page 35 Thursday, December 7, 2006 10:12 AM