Ditek DTK-120HWLOK 120V Parallel Surge Protector Lockout

Product Description

The DITEK DTK-120HWLOK is a 120-volt parallel-wired surge protection device with integrated lockout functionality, designed for fire alarm and life-safety system applications. It provides transient voltage surge suppression on AC power lines running to fire alarm control panels and associated equipment. The parallel configuration allows the unit to clamp and divert surge energy without interrupting the protected circuit under normal operating conditions. The lockout feature disables the protected circuit when the suppressor reaches end-of-life, preventing unprotected equipment from remaining in service. Licensed fire alarm technicians and low-voltage electricians are the primary installers of this device.

This surge protector is intended for use on 120-volt AC power circuits feeding fire alarm control panels, annunciators, and related life-safety equipment in commercial and residential installations. It is suited for applications where code compliance and system integrity require verified surge protection with a clear indication of suppressor status. The lockout output provides a supervisory signal or circuit interruption to alert monitoring personnel when the unit requires replacement.

Key Features

• Parallel-wired configuration preserves circuit continuity during normal operation
• Lockout function disables the circuit at suppressor end-of-life to prevent unprotected operation
• Rated for 120-volt AC power line applications
• Designed specifically for fire alarm and life-safety system power circuits
• Single-unit form factor for straightforward panel or enclosure mounting

Compatibility

Designed as an OEM-style surge protection solution for 120-volt AC power inputs on fire alarm control panels and life-safety system equipment.

Installation Notes

Installation should be performed by a licensed electrician or fire alarm technician in accordance with NFPA 72, NEC Article 285, and applicable local codes. De-energize the circuit at the breaker and verify absence of voltage before wiring. Follow the manufacturer data sheet for connection terminal assignments and ensure the lockout output is wired to a supervised circuit or indicator where required by the system design. Do not bypass or jumper the lockout contacts to defeat the end-of-life signal.