Carrier 51531B Oil Primary Relay and Ignitor Combination 120V 14KV 30mA

The Carrier 51531B is an OEM oil primary relay and ignitor combination designed for use in Carrier oil-fired heating equipment. This unit integrates the oil burner primary control and high-voltage ignition transformer into a single assembly, simplifying service and replacement on compatible oil burner systems.

The ignitor section steps up the 120V primary input to a 14,000-volt (14KV) high-voltage output at 30mA, delivering reliable spark energy to ignite the oil burner flame. The midpoint ground configuration splits the high-voltage output symmetrically — producing 7KV at each electrode relative to ground — which helps ensure consistent, efficient spark ignition while reducing electrode wear.

Key Specifications:

• Primary Input Voltage: 120V AC
• Secondary Output Voltage: 14,000V (14KV)
• Secondary Output Current: 30mA
• Grounding Type: Midpoint Ground
• Part Type: Oil Primary Relay and Ignitor Combination
• OEM Manufacturer Part Number: 51531B
• Brand: Carrier / Bryant (Factory Authorized Parts)

As a Factory Authorized Part (FAP), the Carrier 51531B is manufactured to OEM specifications, ensuring proper fit, function, and reliability in compatible Carrier and Bryant oil-fired heating systems. Please note this part has been discontinued by the manufacturer and may have limited availability.