The catalog number 849A-ZOA25 is used for an industrial timer component that is a pneumatic type of timer. The unit is used in the Allen-Bradley 849A systems and it is designed and manufactured by Allen-Bradley/Rockwell Automation. It must be noted that the 849A-ZOA25 timer model is used for heavy duty applications and it is one of the most advanced units available from the series. The 849A-ZOA25 timer unit has a maximum voltage rating of 600 Volts AC and an input voltage rating of 120 Volts AC. The operating frequency is 60 Hertz. The typical time range for the 849A timer devices is from 0.05 to 180 seconds. The enclosure of the timer unit is open and its weight is around 2 kilograms (4.5 pounds).

The 849A-ZOA25 timer unit is certified according to the UL and CSA standards and it is customized for rough operating conditions. The 849A series offers timers with contact ratings which include make currents of 60, 30, 15, and 12 Amps and break currents of 6, 3, 1.5, and 1.2 current. These timers also feature a continuous carrying current of 10 Amps and 7200 Volt-Amps for the make rating and 720 Volt-Amps for break rating. The current rating for a voltage range of 115 to 125 Volts DC is 0.4 Amps and the ratings for a voltage range of 230 to 250 Volts DC is 0.2 Amps. The timers from the 849A series offer great accuracy and protective features that prevent the system from malfunctioning. The 849A series timers provide on-delay and off-delay capabilities along with high-quality synthetic rubber bellows and they are available with auxiliary contacts. The manufacturer provides renewal parts for the 849A systems, including solenoid base assemblies, coil clamps, plunger guides, plunger pins, spring support plate assemblies, and timing mechanisms.