Resistor and fuse overcurrent protection device
A device, according to one embodiment, includes a fuse, and a resistor electrically coupled directly to the fuse in series therewith. A hybrid device, according to another embodiment, includes a fuse, and a resistor electrically coupled directly to the fuse in series therewith in a single package. A resistance of the resistor is 1 ohm or less, and is substantially temperature insensitive.
1. A device, comprising:
a fuse; and
a resistor electrically coupled directly to the fuse in series therewith,
wherein the resistor is positioned after the fuse in an intended direction of current flow therethrough,
wherein the fuse and resistor are in a single package,
wherein a resistance of the resistor is not temperature sensitive,
wherein an electrical path of the device consists of the fuse, the resistor, and an optional conductive path between the fuse and the resistor, wherein the resistor is a variable resistance resistor.
2. The device of claim 1 , wherein a power dissipation of the resistor is sufficiently high to ensure that the fuse will open before the resistor becomes overloaded, wherein the fuse is a hot swap fuse, wherein the hot swap fuse is replaceable separately from the resistor.
3. The device of claim 1 , wherein the resistor is a plurality of resistors coupled in parallel with one another.
4. The device of claim 1 , comprising;
a warning system that is configured to generate a warning,
wherein the warning system of the device has saved therein a calculation for determining a time expected for the fuse to blow as a result of the fuse experiencing a current level greater than a predetermined power rating of the resistor,
wherein the device is configured for direct current application.
5. A device, comprising:
a fuse;
a resistor electrically coupled directly to the fuse in series therewith,
wherein the resistor is positioned after the fuse in an intended direction of current flow therethrough,
wherein the fuse and resistor are in a single package,
wherein the fuse and resistor are physically stacked one atop the other in the single package; and
an electrical insulator extending from a surface of the fuse to a surface of the resistor for separating the fuse from the resistor.
6. The device of claim 5 , wherein the fuse and resistor are at least partially off center relative to one another.
7. The device of claim 5 , wherein a resistance of the resistor is 1 ohm or less, and further comprising a current source coupled to the fuse for sending current through the fuse in the intended direction of current flow.
8. The device of claim 5 , wherein a resistance of the resistor is not temperature sensitive.
9. A hybrid device, comprising:
a fuse; and
a variable resistance resistor electrically coupled in series with the fuse in a single package,
wherein the fuse is a hot swap fuse that is replaceable separately from the resistor,
wherein a maximum resistance of the resistor is 1 ohm or less.
10. The hybrid device of claim 9 , wherein a power dissipation of the resistor is sufficiently high to ensure that the fuse will open before the resistor becomes overloaded.
11. The hybrid device of claim 9 , wherein the resistor is positioned after the fuse in an intended direction of current flow therethrough.
12. The hybrid device of claim 9 , wherein a conductive path of the device consists of the fuse and the resistor, wherein the resistor is electrically coupled directly to the fuse, wherein a resistance of the resistor is 0.5 ohms or less.
13. The hybrid device of claim 12 , comprising:
an electrical insulator extending from a surface of the fuse to a surface of the resistor for separating the fuse from the resistor; and
a warning system that is configured to generate a warning,
wherein the warning system of the device has saved therein a calculation for determining a time expected for the fuse to blow as a result of the fuse experiencing a current level greater than a predetermined power rating of the resistor,
wherein the device is configured for direct current application,
wherein the fuse and resistor are physically stacked one atop the other,
wherein the fuse is the only fuse in the device.
14. The hybrid device of claim 12 , wherein the device is configured for direct current application.
15. The hybrid device of claim 9 , wherein the device is configured for direct current application.
16. The hybrid device of claim 15 , wherein the resistor is physically stacked on top of the fuse, wherein the fuse and resistor are stacked at least partially off center so that the fuse and resistor are not aligned.
17. The hybrid device of claim 9 , wherein the fuse and resistor are physically stacked one atop the other; and comprising: an electrical insulator extending from a surface of the fuse to a surface of the resistor for separating the fuse from the resistor.
18. The hybrid device of claim 9 , wherein a resistance of the resistor is substantially temperature insensitive, wherein the substantially temperature insensitive resistance of the resistor changes by less than 1% during use.
19. The hybrid device of claim 9 , wherein a resistance of the resistor changes less than 0.1% during use.