Heavy Duty - UL Rated 300 Amps Continuous Load Case allows surface, rear, or front mount. Mounting studs are tin coated copper and accept 3/8" ring terminals. Cranking rating is 1500 amps for 10 seconds and 500 amps for 5 minutes. You can run 6 to 48 volts DC using cable size to meet ratings of 4/0.