Ditek DTK-120HW Type 1 Surge Protector 120V

Type-1 Surge Protective Device for 120V Circuits

The Ditek DTK-120HW Surge Protector is a compact, hardwired Type 1 SPD designed to protect fire alarm panels, control systems, and branch circuit equipment from damaging electrical surges. Built for single-phase 120VAC applications, it provides reliable protection in harsh indoor or outdoor environments with a NEMA 4X-rated enclosure. A diagnostic LED offers continuous visual confirmation of system power and surge protection status.

Key Features

• Type 1 SPD for 120VAC single-phase circuits (2W + G)
• 50,000A surge current rating for robust protection
• NEMA 4X weatherproof enclosure – suitable for outdoor or damp locations
• Diagnostic LED indicator confirms operational status
• Automatic reset and drift compensation for long-term reliability
• Approved for use on 20A circuit breakers
• UL1449 5th Edition and CSA C22.2 certified

Technical Specifications

• Model: DTK-120HW
• Voltage Configuration: 120VAC Single Phase (2W + G)
• Modes of Protection: L-G, L-N, N-G
• MCOV: 150V
• Voltage Protection Rating: 700V (L-G/L-N), 1500V (N-G)
• Surge Current Rating: 50,000A
• Nominal Discharge Current (In): 10kA
• SCCR: 100,000A
• Connection: ¾" NPT male with 18" 12 AWG leads
• Housing: Polycarbonate, NEMA 4X-rated
• Operating Temperature: -31°F to 176°F (-35°C to 80°C)
• Dimensions: 3.5" L × 1.89" W × 3.4" H
• Certifications: UL1449 5th Edition, CSA C22.2 No. 269.1-17

Conclusion

The Ditek DTK-120HW provides professional-grade surge protection for fire alarm control panels, branch circuits, and sensitive electrical equipment. Compact, weatherproof, and UL-listed, it offers long-term durability and reliable protection in demanding residential, commercial, and industrial applications.