Honeywell Thermocouple circuit breaker with connection kit 45900404-002B

This kit is a threaded adapter with quick-connect terminals of 6.3 mm format, intended for use in Honeywell gas equipment flame control systems. It installs into the thermocouple circuit, for example to connect a draft control sensor. When draft fails or flame extinguishes, the circuit breaker de-energizes the gas valve. The kit contains the threaded adapter and the 6.3 mm connecting terminals. Article number: 45900404-002B.

Connector sets for burner control systems are selected by matching pin count, pitch, keying, conductor cross-section, insulation temperature class, length, and terminal type to the control board and the mating component. Before ordering, compare the existing connector's physical dimensions and contact arrangement. Ensure the pin count and keying match both the control board and the mating component connectors. The terminal size and insulation class must suit the current and temperature conditions inside the appliance.

Poor contact in connectors can reproduce almost any electrical fault symptom, including intermittent lockouts, false flame signals, or component failures. An undersized connector or one with insufficient temperature rating can degrade over time and cause intermittent faults. Connectors are a routine suspect during fault finding on a burner system.