Lennox 19J71 – FirstChoice 19J71, Transformer, 75 VA, 120/208/240/480 VAC Primary to 24 VAC Secondary

This Lennox FirstChoice 19J71 transformer provides reliable low-voltage power for a wide range of HVAC applications. Designed for durability and stable performance, it features multiple primary voltage inputs and a consistent 24 VAC output, making it ideal for furnaces, air handlers, and control systems requiring dependable 24-volt operation. Its compact footprint allows easy installation in residential and light commercial HVAC equipment.

Features
• 75 VA rated transformer for stable low-voltage control power
• Multi-tap primary input: 120/208/240/480 VAC
• 24 VAC secondary output
• Compatible with Lennox systems and many universal HVAC setups
• Durable construction designed for long service life
• Ideal for furnaces, air handlers, and control circuits
• OEM FirstChoice replacement ensures proper fit and reliable functionality

Technical Specifications
• Primary Voltage: 120/208/240/480 VAC
• Secondary Voltage: 24 VAC
• Power Rating: 75 VA
• Application: HVAC control power, furnaces, air handlers, zone systems
• Mounting: Standard transformer mount (foot-mounted or surface-mounted depending on configuration)