Sensata RP-4A Thermal Protector 277V Low Sensitivity 3 Wire

Identification & Use

This thermal protector is a contractor grade safety device designed for installation in commercial lighting electrical systems requiring dedicated voltage thermal protection. The device monitors operating temperature and interrupts the electrical circuit when unsafe heat conditions occur, protecting ballasts and wiring from thermal overload. Typical applications include HID fixtures and magnetic ballast lighting systems requiring replacement thermal protection during maintenance or repair. The protector installs inline within the circuit to provide automatic reset thermal interruption.

Fit & Electrical Compatibility

• Voltage: 277V dedicated circuit application
• Wiring: 3 wire thermal protector configuration
• Sensitivity: Low sensitivity thermal trip
• Compatible Systems: Magnetic ballast lighting circuits
• Installation: Series wired into circuit
• Not Compatible: LED driver circuits
• Reset Type: Automatic thermal reset
• Not Compatible: Electronic driver temperature sensing systems

Technical Performance Specifications

• Rated Voltage: 277 Volts
• Device Type: Thermal overload protector
• Wire Configuration: Three lead connection
• Trip Sensitivity: Low sensitivity thermal response
• Reset: Automatic reset after cooling
• Installation Method: Inline electrical protection
• Protection Function: Overtemperature circuit interruption
• Application Environment: Commercial ballast systems
• Electrical Function: Safety shutoff device
• Mounting: Internal fixture installation
• Control Type: Passive thermal protection

Fixture / Application Type

Designed for installation inside commercial luminaires using magnetic ballasts including HID high bay, wall pack, and industrial lighting fixtures.

System Matching / Replacement Reference

Used as a replacement thermal safety protector for failed or tripped ballast protection devices in commercial magnetic ballast lighting systems.

Installation Requirements

Requires proper wiring into the ballast circuit by qualified personnel. Installer must verify circuit voltage and wiring configuration before energizing.

Final Application Guidance

Provides thermal safety protection for ballast systems during maintenance repair. Confirm circuit voltage and wiring configuration to ensure proper protective operation.