Best Power Transformers of 2026

The Emerson 24V 75VA Transformer is designed for use in industrial, heating, and air conditioning control systems, making it a reliable choice for those applications. It features color-coded primary wires, which simplifies the installation process by helping you quickly identify connections. The transformer supports multiple input voltages—120, 208, and 240 volts—giving you flexibility depending on your power source. Its 24-volt output makes it suitable for low-voltage control circuits, ensuring safe and efficient operation. Overall, this transformer offers convenience and adaptability for your electrical control needs.

The VEVOR Voltage Transformer offers exceptional flexibility in controlling voltage, allowing you to easily adjust settings for brightness, speed, and temperature. With a power capacity of 2000VA and a wide output range of 0-130V, this device ensures optimal performance for your appliances. Safety is a top priority, featuring fuses and a thermal control switch to protect your equipment from overload. Its durable metal casing and effective heat dissipation design guarantee longevity and reliability, making it suitable for both home and industrial use.

The Robertson Step-Down Transformer is designed to convert high 277V input voltage down to a safer 120V output, making it perfect for powering low-voltage devices like lighting controls and HVAC sensors. It delivers up to 25VA of isolated power, ensuring your thermostats, timers, and relays operate safely and efficiently. Its compact and enclosed design allows you to easily install it in tight spaces such as junction boxes or control panels. Plus, with built-in surge and transient protection, this transformer safeguards your equipment from electrical spikes and voltage fluctuations, providing reliable, long-lasting performance.

The Hubbell Acme Control Transformer offers reliable power conversion with a compact 0.05 kVA capacity. Its epoxy-encased design shields the core and coils from dust and moisture, helping you maintain performance in tough environments. The transformer is built with high-quality silicon steel laminations that reduce energy loss and boost efficiency, saving you on operating costs. It also features molded terminal blocks with built-in barriers to protect against electrical arcs, making installation safer and easier. This transformer works efficiently at both 50 and 60 Hz, providing flexibility for various industrial applications.

The BOJACK EI Type Isolation Control Transformers are high-quality transformers with primary voltage of 120/208/240 V AC and secondary voltage of 24 V AC. With a power rating of 40 VA, they are a replacement for several popular models. These transformers are foot mountable and come with WHT-BLK-RED-ORG and RED-GRN colored wires for primary and secondary voltages, respectively.

The SIEMENS Power Transformer is designed to convert high primary voltages of 240 x 480 volts down to safer, more usable secondary voltages of 120 x 240 volts. This makes it ideal for powering various industrial and domestic equipment. With a power rating of 100 VA, it handles moderate electrical loads efficiently. Its core is made from silicon steel laminations and uses copper magnet wire, which improves energy efficiency and reduces power loss during operation. Additionally, the transformer is sealed with epoxy to protect it from moisture, dust, and other industrial contaminants, ensuring durability and reliable performance in tough environments.

The VEVOR Voltage Transformer lets you easily adjust the output voltage to control things like brightness, temperature, and speed, making it perfect for home, office, or industrial use. With a strong 2000VA power capacity and a wide output range up to 130V, it supports your equipment smoothly and efficiently. Safety is a priority, as it includes fuses, a thermal switch, and overload protection to keep your devices secure. Built tough with a metal case and ventilation for heat control, this transformer is designed to last and give you reliable performance every time.

The kzfuli 12V Power Transformer is designed to convert 120V input voltage to a safe 12V output, perfect for your RV electric fireplace, LED strips, or small instruments. It features a compact size of just under 3 inches wide and 1.7 inches high, making it easy to install in tight spaces. With a rated power of 10VA, it handles small power needs without risk of overload, ensuring reliable performance. The transformer’s Class 2 insulation provides added safety by isolating electrical components, offering peace of mind during use.

This 24V 40VA control transformer with primary voltage of 120/208/240V AC and secondary voltage of 24V AC is designed for industrial, heating and air conditioning controls. It can be used in air conditioning circuits, relays, gas valves and other applications up to the listed ratings. With foot mount design, it's easy to install and compatible with various HVAC furnaces.

Jameco Valuepro Transformer is a reliable power solution with a primary voltage option of 115/230Vac @ 50-60HZ, making it versatile for various setups. The clearly labeled primary wire colors in black simplify installation. With a secondary voltage of 24Vac @ 2A and white secondary wire colors, this transformer ensures efficient power distribution. The power rating of 48VA guarantees stable performance, ideal for powering your devices seamlessly.