Qmark LTR2240 Spst Transformer Relay 240 Volt

Product Description

The QMARK LTR2240 is a single-pole single-throw (SPST) transformer relay designed for use in electric heating control circuits. This relay serves as a switching component that allows a low-voltage control signal to operate a higher-voltage load circuit, a common configuration in wall heaters, unit heaters, and baseboard heating systems. Rated for 240-volt applications, it provides reliable switching performance in residential and light commercial heating equipment. Licensed electricians and HVAC technicians are the typical installers for this type of component.

This relay is suited for electric heating applications where a transformer-relay combination controls the cycling of a heating element or fan circuit. It is commonly found in forced-air unit heaters and electric wall heaters that require a low-voltage thermostat interface to switch a 240-volt load. The SPST configuration provides a single switching contact path, keeping the control circuit straightforward and easy to service in the field.

Key Features

• SPST contact configuration for single-circuit switching control
• Rated for 240-volt heating system applications
• Transformer-relay design enables low-voltage thermostat compatibility with higher-voltage load circuits
• Compact form factor suited for installation within heater enclosures
• Designed as a direct replacement component for electric heating controls

Compatibility

Designed as an OEM-style replacement relay for QMARK electric heating equipment requiring an SPST transformer relay in 240-volt control circuits.

Installation Notes

Installation should be performed by a licensed electrician or qualified HVAC technician in accordance with the NEC and applicable local codes. Disconnect and lock out all power to the heating unit before removing or installing the relay. Verify that the replacement relay matches the voltage and contact rating of the original component before energizing the circuit. Do not bypass or jumper relay contacts during testing while the unit is energized.

Technical Specifications

• Contact Configuration: SPST
• Voltage Rating: 240 volts
• Weight: 1 pound

Standard Information

• Brand: QMARK
• Manufacturer Part Number: LTR2240