HVAC Transformer Supplying Demand 40VA Transformer SD46-101496-01

Description

Product Overview

The Supplying Demand 40 VA HVAC transformer is engineered to deliver a stable 24 V output from a standard 120 V input, a requirement that is common across a wide range of heating, ventilation, and air‑conditioning (HVAC) equipment. Built to meet Class 2 power limiting standards, the unit incorporates a robust 2 A external fuse that safeguards downstream components from overcurrent conditions while maintaining compliance with safety regulations. Its compact dimensions—49 × 2.5 × 2.25 inches—and lightweight construction (1.61 lb) make it an ideal fit for OEM mounting applications where space is at a premium.

Electrical connections are provided via leads equipped with 1/4‑inch insulated female quick‑connects, allowing technicians to secure wiring quickly and reliably without the need for additional crimping tools. The transformer’s four‑hole spacing of 1‑7/8 × 1‑1/2 inches aligns with standard panel mounting patterns, ensuring a seamless integration into existing control panels or equipment enclosures. The device operates efficiently at both 50 Hz and 60 Hz frequencies, making it suitable for installations in diverse geographic regions.

Manufactured by Supplying Demand, a brand recognized for its commitment to quality in industrial and scientific components, this transformer carries an ASIN of B0C2VX8BSL and has earned a 4.7‑star rating from verified customers. Its best‑seller rank of #75 in the Isolation Transformers category reflects strong market acceptance and reliability. The product is packaged in Supplying Demand branding, reinforcing brand consistency and providing clear identification for inventory management.

Designed for professional use, the transformer is intended for installation by qualified technicians who understand the nuances of HVAC system wiring and safety protocols. While the unit is compatible with major HVAC brands, it is always recommended to verify fitment against specific equipment models to guarantee optimal performance. The transformer’s construction utilizes high‑grade copper windings and a durable enclosure that resists corrosion, extending service life even in demanding industrial environments.

Overall, the Supplying Demand 40 VA HVAC transformer offers a blend of performance, safety, and ease‑of‑installation that addresses the core needs of modern HVAC installations. Its OEM‑mount capability, integrated overcurrent protection, and user‑friendly quick‑connect leads provide a turnkey solution for technicians seeking to reduce downtime and improve system reliability.

Usage

This transformer is ideally suited for a variety of HVAC applications, including but not limited to air handling units, furnace control boards, and refrigeration compressors that require a 24 V control voltage. In commercial building automation systems, the transformer can be employed to power thermostats, variable‑frequency drives, and safety relays, ensuring consistent operation across a network of devices. Its compact form factor also makes it a practical choice for retrofitting older equipment where panel space is limited.

Because the unit supports both 50 Hz and 60 Hz input frequencies, it can be deployed in international projects without the need for additional frequency conversion hardware. The transformer’s robust construction allows it to withstand temperature fluctuations and vibration typical of HVAC environments, making it reliable for both indoor and outdoor installations when housed within a protected enclosure.

Professional HVAC technicians will appreciate the quick‑connect leads, which reduce wiring time and minimize the risk of loose connections that could lead to system failures. The integrated 2 A fuse provides an added layer of protection, simplifying maintenance procedures by offering a clear indication of overcurrent events. This makes the transformer a dependable component for critical applications where system uptime is essential.

Why Choose Us

Choosing Supplying Demand means selecting a partner with a proven track record in delivering high‑quality isolation transformers for industrial and scientific markets. Our products undergo rigorous testing to meet or exceed industry standards, ensuring that each unit performs reliably under load and over its expected service life. The 40 VA rating provides ample capacity for most HVAC control circuits while maintaining efficiency and low heat generation.

We stand behind our products with comprehensive technical support and a responsive after‑sales service team. Should any questions arise during installation or operation, our engineers are available to provide guidance, troubleshooting assistance, and documentation to help you get the most out of your investment. This commitment to customer satisfaction distinguishes us from competitors who may offer limited post‑sale resources.

In addition to product reliability, we prioritize environmental responsibility. Our transformers are designed to be recyclable at the end of their lifecycle, and we adhere to RoHS compliance to limit the use of hazardous substances. By selecting our transformer, you not only gain a high‑performance component but also contribute to sustainable practices within the HVAC industry.

Key Features

• Compact OEM‑mount design saves panel space and simplifies installation for tight enclosures.
• Integrated 2 A external fuse provides built‑in overcurrent protection, reducing the need for additional safety devices.
• Quick‑connect 1/4‑inch insulated leads enable fast, secure wiring without specialized tools.
• Durable copper windings and corrosion‑resistant enclosure ensure long‑term reliability in harsh environments.
• Dedicated technical support and warranty service give peace of mind and quick resolution of any issues.

FAQ

What is the recommended wire gauge for connecting this transformer?

For the primary 120 V side, a minimum of 18 AWG copper wire is recommended, while the secondary 24 V side can use 20 AWG. Using the specified gauge helps maintain voltage drop within acceptable limits and ensures safe operation.

Can this transformer be used with a variable‑frequency drive (VFD) in an HVAC system?

Yes, the transformer’s 40 VA rating is sufficient for most VFD control circuits that require a 24 V supply. However, it is advisable to verify the VFD’s power requirements to confirm compatibility, especially in high‑power applications.

Is the 2 A fuse replaceable, and where can I obtain a replacement?

The external fuse is designed to be user‑replaceable. You can source a compatible 2 A fuse from any reputable electrical component supplier. Ensure the replacement fuse matches the voltage rating (at least 250 V) and type (fast‑acting) specified in the product manual.

What certifications does this transformer hold?

The transformer complies with UL and CE standards for isolation transformers, meeting safety and electromagnetic compatibility requirements for industrial use. It also adheres to RoHS guidelines, limiting the use of hazardous substances.

How do I verify that the transformer is properly mounted and secured?

After mounting the unit using the four‑hole spacing (1‑7/8 × 1‑1/2 inches), tighten all mounting screws to the manufacturer’s torque specifications. Verify that the transformer is level, that the leads are not strained, and that the enclosure is closed securely to protect against dust and moisture.