Johnson Controls M9203-BUB-2 Spring Return Direct Coupled Actuator, 1 SPDT

Description

The Johnson Controls M9203-BUB-2 is a robust, spring return direct coupled actuator engineered for reliable two-position damper control in commercial and light industrial HVAC applications. With a wide-range universal voltage input and a built-in SPDT auxiliary switch, this actuator delivers dependable fail-safe performance and easy integration into building automation and control systems.

Key Features

• Universal voltage input: 85–264 Vac — compatible with a broad range of control systems without the need for voltage-specific models
• Two-position (on/off) operation for straightforward open/close damper control
• 27 lb-in output torque for positive, consistent damper actuation
• Spring return fail-safe design — returns damper to the spring-loaded position upon loss of power
• Power-on run time of less than 75 seconds for fast, responsive actuation
• 48″ appliance cable with 1/2″ conduit connectors for flexible, code-compliant wiring installation
• 1 SPDT auxiliary switch for end-of-travel signaling, interlocking, or status indication
• Direct coupled design — mounts directly to damper shaft without crank arms or linkages, simplifying installation

Technical Specifications

• SKU / Model: M9203-BUB-2
• Brand: Johnson Controls
• Supply Voltage: 85–264 Vac (universal)
• Operation: Two Position (Spring Return)
• Output Torque: 27 lb-in
• Power-On Run Time: Less than 75 seconds
• Cable Length: 48″ appliance cable
• Conduit Connectors: 1/2″
• Auxiliary Switch: 1 SPDT
• Mounting: Direct coupled to damper shaft

Applications

• Commercial HVAC air handling units and rooftop units
• Ventilation and exhaust damper control
• Building automation and energy management systems
• Outdoor air and economizer damper applications
• Fire/smoke damper interlock signaling via SPDT switch

Why Choose the Johnson Controls M9203-BUB-2?

The M9203-BUB-2 combines a universal voltage range with a spring return fail-safe mechanism, making it a versatile and reliable choice for contractors and building engineers alike. The included SPDT auxiliary switch enables seamless integration with control panels, DDC systems, or interlock circuits. The 48″ pre-wired appliance cable with 1/2″ conduit connectors speeds up field installation and ensures a clean, professional finish.