Bussmann MDL 6.25A 250V AC Glass Fuse 10kA 125V 200A 250V

6.25 A 250 V AC glass fuse

This Bussmann MDL-series fuse is a cylindrical glass-bodied device rated for 6.25 amperes at 250 volts AC. It provides time-delay, non-rejection over-current protection for equipment that experiences brief inrush currents. The 1-1/4 inch by 1/4 inch form factor fits standard fuse holders used in control panels, instrumentation and similar low-voltage circuits. Buyers who need a faster-acting or high-breaking-capacity fuse for semiconductor protection should look elsewhere.

Sustained overload behaviour

The time-delay element tolerates temporary surges without opening, yet interrupts sustained overloads to protect downstream wiring and components. At 125 V AC the fuse is rated to break 10 kA, while at the nominal 250 V AC its interrupting rating is 200 A. This dual rating means the device remains safe on circuits where the available fault current does not exceed those values. Installations with higher prospective short-circuit current require a fuse with a greater interrupt rating.

Interrupt rating at 250 V AC

The single specification that decides suitability is the 200 A interrupting capacity at 250 V AC. If the circuit can deliver more than 200 amperes under fault conditions, this fuse cannot safely clear the fault and a higher-rated alternative must be selected. For circuits limited to 200 A or less at 250 V AC, the MDL series provides reliable time-delay protection in the standard 1-1/4 inch glass package.