White-rodgers 24a51-10 Electric Heat Sequencer Spst

Product Description

The WHITE-RODGERS 24a51-10 is an electric heat sequencer and time delay relay designed for residential and light commercial electric heating systems. It features one SPST normally open main switch with an on-timing of approximately 45 seconds and an off-timing of approximately 23 seconds. The bimetal heater element operates on 24 VAC at 60 Hz, drawing 0.16 amps. It provides staged activation of heating elements to reduce current inrush and balance load demand across the system. Licensed HVAC technicians install this component as part of electric furnace servicing or electric heat system upgrades.

The 24a51-10 is suited for use in electric furnaces, duct heaters, heat pump auxiliary heating stages, and other electric heating equipment. Its ambient-compensated bimetal design maintains consistent timing across a wide temperature range, making it reliable in both conditioned and unconditioned equipment spaces. The multi-poise mounting configuration allows installation in any orientation, which simplifies fitment in tight or unconventional equipment compartments. Dual tab terminals provide straightforward wiring access during installation or replacement service calls.

Key Features

• SPST normally open main switch with 45-second on timing and 23-second off timing
• Bimetal heater input: 24 VAC, 60 Hz at 0.16 amps current draw
• Ambient-compensated design for consistent timing across operating temperatures
• Multi-poise mounting supports any installation orientation
• Dual 0.25-inch male quick-connect terminals for fast, secure wiring access
• Snap-acting main switch for quiet, reliable switching operation
• Low-voltage auxiliary switch available to pull in additional sequencers for staging

Compatibility

Designed as an OEM-style replacement sequencer for electric furnaces, duct heaters, heat pump auxiliary heat stages, and other electric heating equipment requiring 24 VAC time delay relay control.

Installation Notes

Installation should be performed by a qualified HVAC technician. Disconnect and lock out all power to the heating system before removing or installing this component. Verify the control voltage supply is 24 VAC, 60 Hz before energizing the circuit. Follow local electrical codes and manufacturer wiring diagrams when terminating connections to the dual quick-connect terminals.

Technical Specifications

• On Timing: 45 seconds
• Off Timing: 23 seconds
• Switch Type: SPST Normally Open
• Number of Main Switches: 1
• Bimetal Heater Input Voltage: 24 volts AC, 60 Hz
• Current Draw: 0.16 amps
• Terminal Type: Dual 0.25-inch male quick-connect
• Ambient Temperature Range: -20 to 165 degrees F (-29 to 74 degrees C)
• Mounting: Multi-poise

Standard Information

• Brand: WHITE-RODGERS
• Manufacturer Part Number: 24a51-10