Johnson Controls A19ABC-42 Utility Thermostat 30067439-890 low-resistance connection when paired with

low-resistance connection when paired with SH4B-05C DIN rail sockets

High-grade ceramic insulator prevents voltage leakage to ground for accurate microamp signal readings

technicians ensure optimal airflow and sealed combustion chamber performance

This specific model is the lead-free updated replacement for the discontinued 0066109

ensuring the unit cuts power to the heating elements or compressor if temperatures exceed safe operational thresholds

Johnson Controls A19ABC-42 Utility Thermostat 30067439-890 low-resistance connection when paired withThe Johnson Controls A19ABC 42 is a heavy duty immersion control utility thermostat engineered for precise temperature management in hydronic heating systems and industrial boiler applications. This SPDT temperature control operates across common line voltages including 120 208 240 Vac, making it a versatile choice for field replacements. It features a broad 100 to 240 degree temperature range with a sensing element consisting of a liquid filled