Siemens 47AB10BF 110/120V Alternating Relay, 1-SPDT

Siemens 47AB10BF Alternating Relay Overview

The Siemens 47AB10BF is a 110/120V alternating relay featuring a single-pole double-throw (SPDT) contact configuration. Designed for dependable load sequencing and alternating duty control in commercial and residential HVAC applications, this relay ensures balanced run-time distribution between two loads — extending equipment life and improving system efficiency.

Key Features

• Coil voltage: 110/120V AC
• Contact configuration: 1-SPDT (Single-Pole Double-Throw)
• Alternating relay design for balanced load sequencing
• Ideal for HVAC control panels, boiler systems, and pump alternation applications
• Siemens quality construction for long-lasting, reliable performance
• Compact form factor suitable for panel mounting

Application

The 47AB10BF alternating relay is commonly used in HVAC and building automation systems where two identical loads — such as pumps, compressors, or fans — must alternate operation to equalize wear and prevent premature failure. Each time the control signal is energized, the relay switches the active load, ensuring neither unit bears a disproportionate share of run hours.

Why Choose Siemens

Siemens is a globally recognized leader in building technologies, automation, and control solutions. Their relay products are engineered to meet the rigorous demands of commercial HVAC environments, delivering consistent switching performance and long service life.