Hartland Controls 90293 Relay

The Hartland Controls 90293 Relay is a heavy-duty SPDT (Single Pole Double Throw) power relay engineered for high-cycle switching in demanding HVAC and industrial control environments. This HCR-5 Series general-purpose relay operates on a 24VAC coil and is a direct field replacement for 48G96, 48G9601, and R37977B003. With a robust 18 Amp contact rating, it effectively manages circuits for fan motors, solenoids, and pump control panels without the chatter or failure common in lower-spec relays.

Designed for chassis mount installation, the 90293 features a compact, non-latching coil design with 0.250" (6.3mm) quick-connect terminals to streamline wiring in tight control boxes. The unit is built with Class B insulation and operates across a wide temperature range, from -40°C to 65°C, ensuring reliability in unconditioned mechanical rooms. Whether you are performing a retro-fit or a critical repair, this Hartland Controls by Littelfuse relay provides the switching performance required for modern residential and commercial HVAC systems.

Key Benefits for Contractors:

• Direct Cross-Compatibility: Seamlessly replaces Allied 48G96 and additional OEM part numbers, eliminating the need for mounting hole modifications.
• High Switching Capacity: The 18A contact rating handles inductive loads reliably, reducing the risk of contact pitting or welding.
• Efficient Coil Operation: Features a "must operate" voltage of 20.4 VAC, ensuring stable engagement even during minor voltage drops in the 24V control circuit.
• Industrial Build Quality: Constructed with silver-based contacts for superior electrical conductivity and thermal resistance in high-cycle applications.

Common Questions

Is the 90293 compatible with DC control circuits?
No, this specific model is designed for 24VAC coil voltage. Utilizing a DC signal will prevent proper actuation and may damage the non-latching coil.

What is the difference between SPDT and SPNO for this series?
The 90293 is a Single Pole Double Throw (1 Form C) relay, meaning it features both normally open (NO) and normally closed (NC) contacts. This allows you to switch between two different circuits rather than just opening or closing one.

Can this relay be used to replace a lower amp fan relay?
Yes, as long as the coil voltage matches (24VAC), the 18 Amp rating of the 90293 is a sufficient "beefier" replacement for many 8A or 12A fan relays often found in furnace and air handler cabinets.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.