Trane THT0905 120/240V SPNC Freeze Stat, 35°F Open / 40°F Close

Description

Trane THT0905 — 120/240V SPNC Freeze Protection Thermostat

The Trane THT0905 is a single-pole, normally closed (SPNC) line-voltage thermostat engineered for dependable freeze protection and low-ambient temperature control in HVAC systems. With factory-set switching points of 35°F (open) and 40°F (close), this freeze stat provides a reliable safety cutoff that guards equipment, piping, and coils against damaging low-temperature conditions.

Key Features

• Single-pole, normally closed (SPNC) switching action — contacts open on temperature rise above setpoint
• Dual-voltage compatibility: 120V and 240V line-voltage operation
• Factory-calibrated open setpoint: 35°F
• Factory-calibrated close setpoint: 40°F
• Designed for freeze protection and low-ambient safety control in HVAC applications
• Genuine Trane OEM replacement part (SKU: THT0905)

Application

The THT0905 is ideal for use as a freeze stat in air handling units, rooftop equipment, and other HVAC systems where low-temperature protection is critical. The SPNC configuration ensures the circuit remains closed during normal operation and opens to interrupt the load when temperatures drop to the 35°F trip point, preventing freeze damage. The unit resets automatically as temperatures recover to 40°F.

Specifications

• SKU: THT0905
• Brand: Trane
• Voltage Rating: 120/240V
• Contact Configuration: SPNC (Single Pole, Normally Closed)
• Open (Trip) Setpoint: 35°F
• Close (Reset) Setpoint: 40°F
• Application: Freeze protection / low-ambient thermostat