This battery switch with key protects on board circuits against unauthorized use and accidental operation. The key is removable. Switching capacity 250 A / 24 VShort-time current 1000MA DC / 5 secThermal current 250 A DCIsolation voltage 1000 V DCRemovable key available seperatelySwitch housing: Fire-resistant polyamideSwitch bridge and pole bolt DIN 1787 CU = 99.99% tinLocknuts: Stainless steel