Siemens GJD126.1U OpenAir Fire/Smoke Damper Actuator 24V 2-Position Spring Return with Auxiliary Switches

The Siemens GJD126.1U is a 20 lb-in, 2-position, spring return electronic damper actuator from the OpenAir GJD Series, designed for use with UL-listed fire/smoke and smoke control dampers in HVAC systems. Operating on 24 VAC/DC, this actuator provides reliable fail-safe performance in life-safety applications.

When power is applied, the actuator drives the damper to the open position (90°) in 30 seconds nominal. Upon power loss, the built-in spring return mechanism closes the damper in 15 seconds or less, ensuring automatic fail-safe closure during fire or smoke events.

Key Features:

• Torque: 20 lb-in (2 Nm) minimum; 35 lb-in (4 Nm) stall torque
• Operating Voltage: 24 VAC ±20% / 24 VDC +20%/-10%
• Control Signal: 2-position On/Off
• Run Time: 30 seconds nominal (90° at 60 Hz)
• Spring Return Time: 15 seconds maximum
• Angular Rotation: 95°
• Two fixed built-in auxiliary switches for end-position feedback and control integration
• Electronic Fusible Link (EFL) capability with temperature ratings of 165°F (74°C), 212°F (100°C), and 250°F (121°C)
• 3-ft plenum-rated pre-cabled lead wires included
• Reversible fail-safe spring return for flexible installation
• NEMA 1 plenum-rated plastic housing
• Ambient operating temperature: 0°F to 130°F (-18°C to 55°C)
• Frequency: 50/60 Hz
• Dimensions (W × H × D): 2.83 × 5.61 × 2.48 in

Certifications & Standards:

• UL 555/555S listed and AMCA Standard 520 compliant
• UL60730; cUL CSA 60730
• CE conformity for Residential, Commercial, and Industrial environments

The Siemens GJD126.1U is backed by a 5-year warranty and is compatible with parallel actuator wiring configurations, making it a dependable solution for fire/smoke damper control in commercial building automation and life-safety systems.