White-Rodgers 90-172 Contactor

The White-Rodgers 90-172 Contactor is a heavy-duty 3-pole definite purpose contactor engineered for demanding central air conditioning and heating applications. This 40 amp contactor features a 208/240 VAC coil with a DC resistance of 720 Ohms, making it a reliable choice for commercial and residential HVACR installations. Built with a low wattage coil and double-break silver cadmium oxide contacts, it ensures a positive make and break even under high-cycle conditions. The integrated dust cover protects the internal switching mechanism from environmental debris, while the any position mounting capability and interchangeable mounting plate allow for seamless integration into existing control panels. With a 40A inductive and 50A resistive rating, this Type 154 contactor handles 5.4 VA nominal and up to 52 VA inrush, providing the high-torque switching required for compressors and large motor loads. Its rugged design meets Class B coil insulation standards, operating efficiently in temperatures ranging from -40°F to 150°F.

• Versatile Application: Designed as a direct replacement for many OEM 3-pole configurations in air handlers and condensers.
• High Reliability: Double break contacts minimize arcing and extend the mechanical life of the 40A contacts.
• Simplified Installation: Features an interchangeable mounting plate that adapts to various hole patterns without extra drilling.
• Efficiency: The 208/240V coil operates at just 19 mA, reducing the overall power draw on the control circuit.
• Enhanced Protection: The factory-installed dust cover reduces the risk of contact pitting and failure in high-pollution environments.

Is the White-Rodgers 90-172 compatible with 24V control systems?
No, this specific model is designed for 208/240 VAC coil circuits. For 24V applications, verify the coil voltage requirements of your control transformer before installing.

Can this contactor be used for resistive heating loads?
Yes, while it is rated for 40A inductive loads (motors/compressors), it is also rated for 50A resistive loads, making it suitable for electric heat banks within its amperage range.

What does 'any position mounting' mean for this 3-pole contactor?
It indicates the internal spring tension and contact alignment are built to operate reliably whether the unit is mounted vertically, horizontally, or at an angle inside the equipment cabinet.

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.