Edwards (3-ZA20A) Zoned amplifier, 20 watt, class a/b. 20 watt selectable for 25 or 70 vrms class a/b output. mounts in 1 lrm space. has built in class a/b nac rated at 3.5 amps. supports one user interface module.

The Edwards 3-ZA20A Zoned Amplifier provides critical audio notification and signaling capabilities for commercial fire alarm systems, delivering robust 20-watt performance across multiple architectural and system configurations. Engineered for professional installers managing complex notification appliance circuits (NACs), this amplifier offers flexible voltage selection and Class A/B compatibility to support diverse fire alarm panel architectures.

Designed for seamless integration into commercial fire detection environments, the 3-ZA20A mounts efficiently in a single LRM space, making it ideal for retrofit and new construction applications in healthcare facilities, educational campuses, office complexes, and industrial settings. Its built-in Class A/B NAC rating and comprehensive interface module support ensure reliable emergency communication infrastructure that meets stringent fire safety compliance standards.

Key Features

• 20-watt output with selectable 25V or 70V VRMS performance
• Class A/B operation with integrated 3.5-amp NAC rating
• Single LRM space mounting for compact system design
• Supports one user interface module for enhanced system configuration
• Compatible with Edwards addressable fire alarm panel architectures
• UL Listed per NFPA 72 emergency communication standards

Specifications

• Output Power: 20 watts
• Voltage Options: 25V/70V VRMS
• NAC Rating: 3.5 amps, Class A/B
• Mounting Space: 1 LRM
• Regulatory Compliance: UL 268, UL 464, NFPA 72

Professional fire alarm technicians will appreciate the 3-ZA20A’s engineering precision, which enables reliable audio notification across complex commercial environments. Whether integrating with HVAC emergency shutdown systems, campus-wide communication networks, or multi-zone notification architectures, this Edwards amplifier delivers consistent, standards-compliant performance.

For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com