24 Volt DPDT Relay by Hartland Controls – 18A Full Load, HVAC Switch

Description

Product Overview

The Hartland Controls 24 Volt DPDT relay is engineered for robust performance in demanding industrial and scientific environments. With a rated full load current of 18 amps and operation at both 50 and 60 Hertz, this relay offers the flexibility required for a wide range of applications, from HVAC control panels to heavy‑load motor circuits. Its double pole double throw (DPDT) configuration enables seamless switching between two separate circuits, providing reliable isolation and redundancy where it matters most.

Constructed from high‑grade copper contacts and a durable thermoplastic housing, the relay ensures long‑term electrical stability and resistance to wear. The compact DIP (dual in‑line package) form factor measures 2.1 x 1.8 x 2.36 inches and weighs only 1.68 pounds, allowing easy integration into tight panel spaces without sacrificing performance. The device meets industry standards for safety and electromagnetic compatibility, giving engineers confidence in its consistent operation under fluctuating load conditions.

Key technical specifications include a coil voltage of 24 V DC, a coil resistance of approximately 120 Ω, and a contact resistance of less than 0.02 Ω when closed. The relay’s mechanical life exceeds 10 million operations, while electrical life reaches 1 million cycles at rated load, ensuring durability for long‑term installations. Additionally, the relay is rated for a maximum switching voltage of 250 V AC, making it suitable for a broad spectrum of control tasks.

Designed with ease of installation in mind, the relay features standard 0.1 inch (2.54 mm) pin spacing, compatible with most printed circuit board layouts. The clear labeling on each pin simplifies wiring, reducing the potential for errors during assembly. Whether you are retrofitting an existing system or building a new control solution, this relay provides a reliable, cost‑effective option that meets the rigorous demands of modern industrial automation.

Usage

In HVAC applications, the 24 Volt DPDT relay excels at controlling compressors, fans, and heating elements that require precise on/off sequencing. Its ability to handle 18 A at 250 V AC ensures that even high‑current components can be switched safely, reducing the need for additional auxiliary relays. This consolidation simplifies wiring diagrams and improves overall system reliability.

Beyond HVAC, the relay is well suited for industrial machinery such as conveyor belts, pumps, and robotic actuators where dual‑circuit control is essential. The DPDT design allows operators to quickly toggle between forward and reverse motor directions, or to switch between primary and backup power sources without manual intervention. This capability enhances operational uptime and minimizes the risk of equipment damage during power transitions.

For scientific instrumentation, the relay provides clean, low‑noise switching that is critical for sensitive measurement equipment. Its stable contact resistance and fast actuation time help maintain signal integrity, making it a preferred choice for laboratory automation, test rigs, and data acquisition systems. The compact size also enables integration into portable devices where space constraints are a primary concern.

Why Choose Us

Hartland Controls has a long history of delivering high‑quality electrical components, and this DPDT relay is no exception. Each unit undergoes rigorous testing for performance, durability, and safety before leaving the factory, ensuring that customers receive a product that meets or exceeds industry expectations. Our commitment to quality is reflected in the relay’s extended mechanical and electrical life ratings, which translate into lower total cost of ownership for end users.

We understand that reliable after‑sales support is as important as the product itself. Our technical support team is available to assist with installation guidance, troubleshooting, and customization options, providing peace of mind throughout the product lifecycle. In addition, we offer a comprehensive warranty that covers manufacturing defects, reinforcing our confidence in the relay’s long‑term reliability.</n

Choosing Hartland Controls means partnering with a supplier that prioritizes innovation, sustainability, and customer satisfaction. Our relays are designed with environmentally responsible materials and manufacturing processes, aligning with modern standards for eco‑friendly industrial solutions. By selecting this relay, you benefit from a blend of performance, durability, and responsible engineering.

Key Features

• Handles up to 18 A full load at 24 V DC, suitable for heavy‑duty applications
• Double pole double throw design provides flexible circuit control and redundancy
• Compact DIP package fits into tight panel spaces while maintaining robust performance
• High‑grade copper contacts ensure low resistance and long electrical life
• Comes with dedicated technical support and warranty for reliable after‑sales service

FAQ

What is the maximum voltage this relay can switch?

The relay is rated for a maximum switching voltage of 250 V AC, making it suitable for most industrial and HVAC control circuits.

Can this relay be used in a 12 V DC control system?

While the relay is optimized for a 24 V DC coil voltage, it can operate at lower voltages; however, coil energization time may increase, and performance is not guaranteed at 12 V DC.

Is the relay compatible with standard PCB mounting?

Yes, the relay features a standard 0.1 inch (2.54 mm) pin spacing, allowing easy insertion into typical printed circuit board layouts without additional adapters.

What warranty does Hartland Controls provide?

Hartland Controls offers a one‑year limited warranty covering manufacturing defects, along with access to our technical support team for installation and troubleshooting assistance.

How does the DPDT configuration benefit motor control applications?

The DPDT arrangement enables you to switch motor direction or select between primary and backup power sources with a single relay, simplifying wiring and improving system reliability.