Taco SR501-4 Generic Switching Relay, 50A UL-Listed, Screw Mount

Description

Product Overview

The Taco SR501 4 Generic Switching Relay is a single‑zone, through‑hole relay engineered for reliable operation in residential and commercial furnace systems. Constructed with a durable screw‑mount housing, the unit measures 11 x 7.5 x 3 inches and weighs just 2 pounds, making it easy to handle during installation or replacement. Its contacts are fabricated from a high‑conductivity silver alloy, delivering low resistance and long‑term durability even under continuous cycling. Rated for a maximum switching current of 12 amps and a continuous current rating of 50 amps, the relay meets UL safety standards, ensuring compliance with industry regulations. The coil operates at 120 V, providing consistent actuation in standard HVAC control panels. Additional features include an automatic operation mode, wireless display capability for diagnostic monitoring, and a robust UL‑listed construction that safeguards against overheating and short‑circuit conditions.

Usage

This relay is ideally suited for furnace replacement projects, HVAC system upgrades, and routine maintenance in both new construction and retrofit scenarios. It can be installed in any single‑zone heating system that requires a reliable switching mechanism to control the blower motor, ignitor, or gas valve. Technicians and DIY enthusiasts alike will appreciate the straightforward screw‑mount design, which aligns with standard relay sockets and eliminates the need for specialized tools. The relay’s 120 V coil voltage matches common control board specifications, allowing seamless integration with existing wiring harnesses. Whether you are servicing a residential furnace, a small commercial heating unit, or a larger HVAC installation, the Taco SR501 4 provides the performance and safety needed for consistent operation throughout the heating season.

Why Choose Us

Choosing the Taco SR501 4 means selecting a product backed by rigorous testing and a commitment to quality. The relay’s UL certification guarantees that it has passed stringent safety and performance evaluations, giving you confidence in its reliability. Our manufacturing process utilizes premium silver‑alloy contact material, which reduces wear and maintains low contact resistance over thousands of cycles. The screw‑mount design not only simplifies installation but also ensures a secure mechanical connection that resists vibration and thermal expansion. In addition, we provide comprehensive after‑sales support, including technical assistance, warranty coverage, and access to detailed installation manuals. Our dedicated customer service team is available to answer any questions and help you troubleshoot potential issues, ensuring that your heating system remains operational and efficient.

Key Features

• High‑current capacity of 50 A for dependable power handling
• UL‑listed safety certification for peace of mind
• Silver‑alloy contacts deliver low resistance and long life
• Screw‑mount design enables quick, tool‑free installation
• Responsive customer support and warranty for hassle‑free ownership

FAQ

What is the maximum switching voltage for this relay?

The Taco SR501 4 is rated for a maximum switching voltage of 120 V, which aligns with standard HVAC control board specifications.

Can this relay be used in multi‑zone heating systems?

While the relay is optimized for single‑zone applications, it can be incorporated into multi‑zone systems if each zone is controlled by a separate relay module.

Is the relay compatible with both 120 V and 240 V coil voltages?

The unit is designed specifically for a 120 V coil voltage. Using a different coil voltage may affect performance and is not recommended.

How does the UL certification benefit me?

UL certification ensures the relay meets rigorous safety and performance standards, reducing the risk of electrical failures and providing compliance with building codes.

What warranty does the relay come with?

All Taco SR501 4 relays include a one‑year limited warranty covering manufacturing defects, backed by our responsive technical support team.