Westinghouse 966480-H AR3.8 NSMP Relay Heater

The Westinghouse 966480-H AR3.8 NSMP Relay Heater delivers reliable thermal overload protection for industrial motor control systems. Designed for relay-mounted installation, it is commonly used in motor starters, control panels, switchgear assemblies, and industrial automation equipment to protect motors from overheating. Key specifications include Manufacturer Part Number 966480-H, Brand Westinghouse, Product Type Relay Heater, Heater Type AR3.8, and its role as thermal overload relay protection within industrial motor protection systems; typical installations include motor starters and control panels, and it is compatible with overload relay assemblies. Common replacements listed are Eaton AR3.8 Overload Relay Heater, Allen-Bradley W38 Thermal Unit, and Siemens Class 14 Overload Heater Element.