The B1256558 is built for longevity in high-cycle applications

but always verify the total VA draw of your contactors

Designed for streamlined integration

the 10M7601 equivalent automatically resets at 130°F

The Robertshaw 620-402 is rated for both 50Hz and 60Hz

Fenwal 06-129500-003 Sampling Tube The B1256558 is built forThe Fenwal 06 129500 003 is a 48 inch air duct smoke detector sampling tube engineered for precise smoke detection in commercial HVAC systems. Designed for duct widths between 3 and 4 feet, this rigid inlet sampling tube directs airflow from the supply or return duct into the sensing chamber of Fenwal DH 60 and DH 2000 series detectors. Its UL 268A listed construction ensures reliable performance across a broad air velocity range of 500 to 4,000 feet