DITEK DTK-120HW Surge Protective Device, 120VAC Single Phase, 50kA

DITEK DTK-120HW — parallel surge protective device for a 120 VAC single phase branch circuit, rated 50,000 A surge current.

Fire alarm panels, access control and gate motors sit on a dedicated 120 V branch, where a transient reaches the panel supply with nothing in the way. It threads into a 3/4 in. knockout and ties in parallel across line, neutral and ground. DITEK asks for at least 3 ft of conductor to the protected equipment.

• UL 1449 5th Edition Type 1 SPD; CSA C22.2 No. 269.1-17 Type 1
• 50,000 A surge current, 100,000 A SCCR, 10 kA nominal discharge current
• 120 VAC single phase, two wire plus ground; MCOV 150V/300V
• VPR 700 V line to neutral, 700 V line to ground, 1500 V neutral to ground
• Recommended 20 A breaker; supply not over 10,000 rms symmetrical A
• NEMA Type 4X polycarbonate, 3.47 " × 2.08 " × 1.89 ", –31 to 176 °F

Three HW models share this housing, differing in service. DTK-240HW is 240/277 VAC and clamps at 1200 V; DTK-120/240HW is the three-wire split phase version, adding an L-L mode; DTK-120HWLOK adds a lockout kit. DTK-120/240CM+ is a split phase HVAC device, not a drop-in.