Westinghouse Type MW Overload Relay Heater Element S966481-H AS4.3 (Lot of 9)

The Westinghouse Type MW Overload Relay Heater Element, part number S966481-H with code AS4.3, is a thermal protection component designed for use in motor control systems, specifically with Westinghouse Type MW overload relays. These heaters provide overload protection by sensing excessive current and tripping the relay to prevent motor damage from overheating. Ideal for industrial applications such as manufacturing plants, conveyor systems, and HVAC equipment where reliable motor protection is essential. Key features include a bimetallic coil design for accurate thermal response, easy installation with screw terminals, and compatibility with legacy Westinghouse motor starters. Advantages over similar products include robust construction for durability in harsh environments, precise calibration for specific current ranges, and availability as new old stock for maintaining vintage equipment. Drawbacks may include obsolescence, requiring cross-referencing for modern equivalents, and limited availability. This lot consists of 9 individually boxed units, appearing in new/unused condition based on images, with no visible wear or damage. They offer cost-effective replacements for maintaining older systems without full relay upgrades. For detailed specifications, refer to Westinghouse heater selection tables; the AS4.3 code typically corresponds to a full load ampere rating around 3.9-4.3A, depending on the exact relay model. Benefits include enhanced safety and reduced downtime in motor-driven operations.