Belimo FSLF24-S-FC US : Fire & Smoke Damper Actuator, 24VAC, 30 in-lb, On/Off Control Input, <15 Second Run Time <15 Second Spring Return, (2) SPST 3A (0.5A Inductive) @ 120/250V Auxiliary Switches, Flex Cable, Damper Area up to 4 Sq.Ft. @ 350F, 5-Year Warranty