Description
The Schneider Electric MA-418-500 is a 120 VAC two-position electric actuator designed for reliable on/off control of dampers and valves in HVAC systems. Originally manufactured under the Barber Colman line, this actuator features a spring-return mechanism and integrated auxiliary switch for fail-safe operation. It is commonly used in commercial air handling and safety-critical applications requiring dependable default positioning on power loss.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Schneider Electric |
| Category |
HVAC Controls |
| Part Number |
MA-418-500 |
| Subcategory |
Electric Actuators |
| Product Type |
Two-Position Spring-Return Actuator |
| Control Signal |
Two-Position (On/Off) |
| Power Supply |
120 VAC, 50/60 Hz |
| Torque Output |
60 in-lb |
| Fail-Safe Mode |
Spring Return |
| Auxiliary Switch |
1 × SPDT |
| Power Consumption (Running) |
70 W |
| Power Consumption (Holding) |
25 W |
| Rotational Stroke |
170°–180° |
| Travel Time |
~20 seconds (no load at 75°F) |
| Enclosure Rating |
NEMA 1 |
| Housing Material |
Die-cast aluminum |
| Mounting Orientation |
Horizontal shaft |
| Weight |
10.2 lb |
Information About MA-418-500
The MA-418-500 is a spring-return actuator from Schneider Electric’s Barber Colman MA-series, built for robust HVAC and industrial control environments. It utilizes a durable die-cast aluminum housing and an oil-immersed motor and gear train to ensure long service life and consistent torque output. This actuator is designed for horizontal shaft mounting and supports two-position (open/close) control logic. It is frequently integrated into building automation systems where auxiliary switch feedback and fail-safe positioning are required.
Key Features:
- Two-Position Control: Provides simple on/off actuation for dampers and valves
- Spring-Return Operation: Automatically returns to a preset position upon power loss
- 60 in-lb Torque Output: Delivers strong mechanical force for HVAC damper applications
- 120 VAC Power Input: Operates on standard building control voltage
- Integrated Auxiliary Switch: Includes one SPDT switch for status indication or interlock control
- Wide Rotary Stroke: Supports approximately 170°–180° of shaft rotation
- Oil-Immersed Drive Train: Enhances durability and reduces internal wear
The MA-418-500 delivers the reliability and precision required for fail-safe two-position damper and valve control in HVAC and building automation systems.
