Hi all,
I have been racking my brain over the past 24 hours trying to figure this one out, but have had no success as of yet.
I am in need of a device that operates much like a standard fuse--it passes current with very little resistance until it reaches a certain threshhold, and then cuts current off. However, the device I'm looking for must be surface-mounted and self-resettable. I have looked at PTC fuses, but they have a resistance that increases as current increases. The device I'm looking for keeps a very low resistance (preferably <0.1 ohms) until a current limit is reached (i.e. 50mA) and then it cuts out. When current is removed, it will reset. The closest I have found is the PTC fuse, but it doesn't quite work for me. I need the voltage on the line to remain nearly the same (a fluctuation in the millivolts range might be ok, but it should be as low as possible) and same with the resistance.
Any thoughts?
Matt
I have been racking my brain over the past 24 hours trying to figure this one out, but have had no success as of yet.
I am in need of a device that operates much like a standard fuse--it passes current with very little resistance until it reaches a certain threshhold, and then cuts current off. However, the device I'm looking for must be surface-mounted and self-resettable. I have looked at PTC fuses, but they have a resistance that increases as current increases. The device I'm looking for keeps a very low resistance (preferably <0.1 ohms) until a current limit is reached (i.e. 50mA) and then it cuts out. When current is removed, it will reset. The closest I have found is the PTC fuse, but it doesn't quite work for me. I need the voltage on the line to remain nearly the same (a fluctuation in the millivolts range might be ok, but it should be as low as possible) and same with the resistance.
Any thoughts?
Matt