The Ditek DTK-2MHLP12B is a voice, data and signaling circuit modular surge protector with a select voltage of 12V. The unit provides robust protection in a compact package.Designed for ease of installation, with convenient field-replaceable modules, the DTK-2MHLP12B protects two circuit pairs per module. Applications include protection of 4-20mA current loops, alarm panel NAC, SLC and IDC loops, and burglar alarm panels. The surge protector is suitable for use on AC and DC circuits. Also known as -Ditek MODULAR PLUG IN SRCH PRT - DK-2MHLP12B