Multi Products 3751 Actuator

The Multi Products 3751 Actuator is a heavy-duty, field-proven 120V actuator motor designed specifically for the rigorous demands of damper and ventilation automation. Built around the TB2001 torque box platform, this unit delivers a consistent 2 RPM rated speed and a robust 70 in-lb stall torque, making it a reliable solution for high-static pressure applications. The synchronous timing motor design ensures precise positioning, while the zinc die-cast housing provides a dust-proof enclosure for internal components. This model features a CW rotation (clockwise) and is equipped with a type A shaft (2 flat, 1.13-inch long) and a rear-mounted handybox for straightforward electrical termination. For technicians managing HVAC damper control systems, the 3751’s impedance-protected coil and heavy-duty metal geartrain offer the durability required for continuous or intermittent duty cycles without performance degradation.

• High Torque Output: Delivers 70 in-lb of stall torque to handle heavy dampers and complex ventilation linkages.
• Rugged Construction: Features a heavy-duty zinc die-cast housing that protects the internal metal geartrain from environmental debris.
• Standardized Fitment: Utilizes the TB2001 series footprint with an 8-32 mounting configuration for efficient field replacement.
• Electrical Safety: Built with a UL recognized impedance protected coil to prevent overheating during stall conditions.
• Low Back Drive: Optimized low back gear torque facilitates reliable performance in various spring return applications.

What is the voltage requirement for the 3751 model?
While the motor is often utilized as a 120V actuator, the 3751 is rated for 120/240V dual-voltage operation, drawing 0.16/0.09 stall amps respectively.

Is this actuator suitable for fire/smoke damper applications?
The 3751 is a standard HVAC replacement motor. For life-safety or UL555S rated smoke dampers, verify that the temperature rating and cycle time meet the specific local building codes and original equipment manufacturer (OEM) requirements.

How do I confirm the rotation direction?
This specific model (3751) is configured for CW (clockwise) rotation. If your application requires CCW, you may need to reference the 3754 or a similar alternative from the Multi Products catalog.

This item is not eligible for free shipping.

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.