HVAC Transformer 75VA 120/208/240/480V to 24V – Mars 50321 – NBK-20606

Transformer 75VA 120/208/240/480V to 24V – NBK-20606 The NBK-20606 Transformer is a dependable HVAC control transformer designed to step down high-voltage power to a safe 24V output for use in low-voltage heating and cooling applications. With multi-tap primary inputs including 120V, 208V, 240V, and 480V, this transformer offers flexible compatibility across a wide range of HVAC systems, making it an ideal replacement for OEM Mars and Packard models. Key Features 75VA Rating: Provides stable power for HVAC control circuits Multi-Voltage Input: Supports 120/208/240/480V primary connections 24V Secondary Output: Standard low-voltage power for thermostats and relays Direct Replacement Fit: Compatible with Mars 50321 and Packard equivalents Specifications SKU: 20606 Category: HVAC, Miscellaneous OEM Brand: Mars Replaces OEM: 50321 Power Rating: 75 VA Primary Voltage: 120/208/240/480V Secondary Voltage: 24V Direct Replacement For Mars: 50321 Packard: PF52475 Why Choose the NBK-20606 Transformer? The NBK-20606 is a reliable solution for replacing worn or failed HVAC transformers. Designed for consistent low-voltage performance, it helps ensure proper operation of control boards, thermostats, contactors, and other essential HVAC components. Installation Tips Always disconnect power before servicing HVAC electrical components. Verify the correct primary voltage tap before wiring. Confirm secure terminal connections to prevent voltage drop. Installation should be completed by a qualified HVAC technician. Pairs Well With Thermostats, Control Boards, Contactor Relays, HVAC Fuse Kits, Low-Voltage Wiring Accessories SPECIAL ORDER NOTICE: This item is sourced through our special order program. Please allow 1–2 business days for processing prior to shipment.