The 117PH Tattletale is used to shutdown 12V through 32V distributor ignition or diesel engines. The 117PH breaks an electrical circuit when tripped. It opens the distributor coil circuit or the power circuit to the diesel run device. It automatically disconnects from battery after trip. The 117PH Tattletale features a manual indicating reset type. The control circuit output contact is NCH. In the latched position the NCH contact has a "hot" output. The latch type is energize to trip. Contacts are rated for 10 amps 32 VDC. A 14 amp fuse is included. Specify for 6 volt systems. Manufacturer's suggestion for 109-PH replacement.