Blue Sea Systems Class T Fuse - 300 Amp

*Description directly from manufacturer*
 
Blue Sea Systems Product Number:  5119
 
Extremely fast short-circuit response
20,000 Ampere Interrupt Capacity (AIC)
 
Amperage
300A
Maximum Voltage
125V DC
Stud Size
190
3/8"
Interrupt Capacity 
20000A @ 125V DC
Weight
0.30lb (0.14 kg)