Free standard shipping on eligible US orders $500+

Honeywell AT140A1000/U 24V 40VA Transformer 120V Primary HVAC

SKU: AT140A1000/U

$54.64

Only 2 left in stock

Same-item volume pricing
QuantityUnit priceSaving
1–4$54.640%
5–9$51.915%
10+$49.1810%

Estimate for this quantity before shipping. Tax display follows store settings. Existing cart quantities can increase the tier. Only one offer applies; a coupon replaces automatic pricing. For 20+ units, contact support for a quote.

Available to order: 2.

Bulk quantity & quote

Enter the total quantity you need. We will confirm availability and a quote before you order.

Request this quantity →

Honeywell AT140A1000/U 24V 40VA Universal HVAC Transformer

The Honeywell / Resideo AT140A1000/U Transformer is a universal 24-volt control transformer designed for replacement use in HVAC and gas-fired heating equipment.

This unit converts 120V primary power to 24V secondary output (40 VA rating), providing reliable low-voltage control power for gas valves, thermostats, relays, and ignition control systems.

Key Specifications

  • 120V Primary Voltage

  • 24V Secondary Output (27V open circuit)

  • 40 VA Rating

  • Screw terminal secondary connections

  • Lead wire primary connections

  • Heavy-duty laminated steel core

Product details

Part / SKU AT140A1000/U

Package includes

  • Honeywell AT140A1000/U 24V 40VA Transformer 120V Primary HVAC

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.

Explore related products

More products in this category. Compare specifications and fit for your application.