White-Rodgers 5D51-78 Fan and Limit Control

The White-Rodgers 5D51-78 Fan and Limit Control is a universal type control that regulates fan or blower operation while acting as a high-limit safety device. It is designed for reliability in furnaces and air handlers, with an open-on-rise contact configuration for precise, fail-safe performance.

Designed for compatibility with many furnaces and air handlers, the 5D51-78 handles a wide temperature range (100 to 300 Deg F) and adjustable 15 Deg F differential (25 Deg F fixed) to match system dynamics. Its open-on-rise contacts ensure timely signaling as temperatures rise, while the compact form fits narrow spaces. UL and CSA approvals confirm safe, code-compliant operation.

• Temperature range: 100 to 300 Deg F
• Differential rating: 15 Deg F adjustable; 25 Deg F fixed
• Contact configuration: Open-On-Rise
• Application: Narrow space limitations; regulates fan or blower operation and acts as high-limit safety control
• Electrical rating: 10 Amp at 120 Volt AC; 6 Amp at 240 Volt AC (FLA); 6 Amp at 24 Volt AC; 1 Amp at 0.3 to 12 Volt DC (Valve and Relay)
• Approvals: UL, CSA
• Dimensions: Element length 11 Inch; Overall 2.9 Inch W x 1.6 Inch D x 4.3 Inch H

Whether retrofitting an older system or configuring a new installation, this White-Rodgers control delivers dependable protection and straightforward integration for efficient climate control.