The TR Series battery disconnect switch from Littlefuse Commercial Vehicle Products (distributed by Peerless Electronics) cuts all battery power from vehicle electrical systems for applications needing two-circuit switching or both positive and negative. The dual-pole, 500 amp continuous current rated master disconnect switch features an ingress rating of IP67 and IP69K, enabling it to be mounted in exposed areas. The switch has a maximum operating voltage of 48 VDC. 800/285-2121; www.peerlesselectronics.com.