Intermatic DTAV40Q Timer

The Intermatic DTAV40Q is a technical-grade 40-amp defrost timer engineered to provide millisecond-accurate control for commercial refrigeration systems. As the direct replacement for DTQMV40, this unit eliminates the need for manual dip switch configurations by utilizing auto-voltage sensing technology, which automatically adjusts between 120V and 240V AC. The quartz-driven movement includes a 72-hour power carryover, ensuring your defrost schedules remain intact during transient power loss or site maintenance. Housed in a rugged NEMA 3R enclosure, the internal components are protected by a conformal-coated circuit board to resist moisture and corrosion in demanding walk-in cooler or freezer environments.

Designed for versatile HVACR applications, the DTAV40Q handles electric heat, hot gas, or compressor shutdown cycles with ease. It supports up to 48 operations per day with 15-minute minimum increments, allowing for precise mechanical defrost tuning. The heavy-duty 2 HP rating and box lug terminals that accommodate up to #8 AWG wire allow for direct integration into high-amperage circuits without additional contactors in many configurations. This multi-voltage defrost control also features LED indicators for real-time status monitoring of refrigeration and defrost cycles.

Key Benefits

• Direct Retrofit Compatibility: Perfectly replaces legacy DTQMV40 and over 40 other competitive models, reducing truck stock requirements.
• Advanced Reliability: The quartz drive with battery backup maintains timing accuracy for 7 days during outages, preventing frozen coils.
• Simplified Installation: Auto-voltage detection (120/208-240V) removes the risk of wiring errors and hardware damage.
• Durable Construction: The rainproof NEMA 3R housing and moisture-resistant board are built for long-term service in wet or high-humidity zones.
• Flexible Termination: Supports time-initiated and time, temperature, or pressure-terminated cycles for optimized energy efficiency.

Common Questions

Is the DTAV40Q compatible with 208V systems?
Yes. The auto-voltage sensing logic identifies and operates across the full 120V to 240V range, including standard 208V commercial power.

What happens to the settings during a power outage?
The quartz movement features a self-recharging battery that provides a 72-hour carryover, ensuring the real-time clock continues to track and initiate defrost cycles exactly as programmed once power is restored.

Can I use this for both air defrost and electric defrost?
Yes. Providing 1 NO and 1 NC contact configuration (40A resistive), it is suitable for compressor shutdown (air), hot gas, and electric heater defrost methods.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.