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

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

Special order item - may require extra time to fulfill and ship. Special order parts are non-returnable.

In stock
SKU: SO-20606
$56.46
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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.