Airpax UPGN66-23587-1 Circuit Breaker

Airpax Sensata Technologies UPGN66-23587-1 is a two-pole hydraulic-magnetic circuit breaker designed to protect 250 VAC circuits in industrial and communications equipment. The unit supports an ampere rating of 1.5 A or 6.5 A (variant dependent) and weighs about 0.46 lb, offering a compact protection solution for small to mid-range loads. Manufactured by Sensata Technologies under the Airpax brand, it belongs to the UPGN66 family and is listed as discontinued by the manufacturer, which means availability is primarily through surplus or third-party distributors. The magnetic-hydraulic trip mechanism provides reliable overcurrent protection with resistance to nuisance trips from short-lived transients, while its two-pole construction ensures simultaneous disconnection of both conductors for safe isolation. Common applications include app/comm circuits in control panels, telecom gear, rack-mounted test benches, and other 250 VAC systems where precise, mid-range protection is required without a separate voltage-sensitive release. The UPGN66-23587-1 designation identifies the specific current-tolerant version within the broader Airpax line, enabling traceability for repairs, upgrades, or replacements in legacy equipment.