Trane CTR1333 Contactor

The Trane CTR1333 is a high-performance 2-pole magnetic contactor designed for demanding commercial and residential HVACR applications. This heavy-duty contactor features a 40-amp inductive rating and a 24V AC coil, making it a drop-in replacement for failed inductive loads in condensing units and heat pumps. Engineered with silver cadmium oxide contacts, the CTR01333 ensures superior conductivity and resists welding or pitting under high-amperage cycles. The compact frame includes universal mounting brackets and provides dual-frequency 50/60 Hz compatibility, ensuring stable switching for compressors and fan motors. Whether you are performing a routine service call or a full system overhaul, this 40A 2-pole contactor provides the mechanical durability required to handle high inrush currents without premature coil failure or chattering. Integrating this Trane OEM replacement contactor ensures the electrical integrity of the system remains within factory specifications for long-term operational reliability.

Key Benefits

• High Ampacity Rating: Rated for 40 Amps Inductive and 50 Amps Resistive to handle heavy compressor loads.
• 24V Control Circuit: Optimized for standard HVAC control transformers with low power consumption.
• Dust-Shielded Design: Enclosed coil construction protects internal components from debris and insects.
• Quick-Connect Terminals: Equipped with large power lugs and standard spade terminals for rapid field wiring.
• OEM Compatibility: Replaces multiple Trane and American Standard CTR01333 and CTR1333 part numbers.

Common Questions

Can I use this 40-amp contactor to replace a 30-amp contactor?
Yes, you can upgrade to a higher inductive rating like this 40A model provided the coil voltage (24V) and number of poles (2-pole) match the original specifications. It provides additional surface area for the contacts.

What causes a 2-pole contactor to fail prematurely?
Common failure points include pitted contacts from arcing, dirt ingress in the magnetic assembly causing "chattering," or a burnt-out 24V coil due to low voltage from the transformer.

Does this unit include a shunt for the second pole?
This is a true 2-pole contactor, meaning both poles break simultaneously. Check your wiring diagram to ensure your system does not require a single-pole plus shunt configuration.

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.