Product Overview
Westinghouse DC Contactor Type MM422 S552D181G26 with Extra Block - Unused NOS
This is a Westinghouse DC Contactor, Type MM422, part number S552D181G26. The assembly includes what appears to be an unused Arc Chute, as shown in the photos. The unit is mounted on a plate measuring approximately 13.5 × 6 inches.
Westinghouse was a major supplier of industrial control and power equipment, with components like this contactor used widely in motor control and DC switching applications. Preserved in storage, this unit remains unused and clean.
Product Condition
Unused, new old stock. No factory box. Includes main contactor and one Arc Chute. Buyer should verify details against photos for exact configuration.
Product Overview
The MM422 DC Contactor is designed for switching and control in electrical systems requiring direct current operation. This unit comes mounted on a steel plate for installation flexibility. With Westinghouse’s reputation in heavy-duty electrical equipment, it is suitable for both replacement and project use in industrial environments.
Key Features
- Brand: Westinghouse
- Type: MM422 DC Contactor
- Part Number: S552D181G26
- Condition: Unused, new old stock
- Includes Arc Chute (see photos)
- Mounted plate dimensions: approx. 13.5 in × 6 in
- No original factory box included
- Industrial-grade construction for DC motor and equipment control
Applications
- DC motor control
- Industrial power distribution systems
- Replacement part in legacy Westinghouse installations
- Switching for DC equipment and controls
- Maintenance stock for facilities and utilities
- Engineering and training environments
Frequently Asked Questions
What model is this contactor?
It is a Westinghouse DC Contactor, Type MM422, part number S552D181G26.
What is included?
The contactor, mounted plate, and an Arc Chute as shown in photos.
Is the unit new or used?
It is unused, new old stock, but no factory box is included.
What are the mounting plate dimensions?
Approximately 13.5 inches by 6 inches.
Has the unit been tested?
No. It has not been tested. Offered as unused NOS based on visual inspection.
Westinghouse built its reputation on durable electrical gear for industry — this MM422 contactor, preserved in storage, is ready for its next installation.
