HP50A619 Danaher
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The Danaher HP50A619 is a timer from the Timers and Controllers series with a maximum timer setting of 30 seconds and a supply voltage of 120 VAC at 60 Hz. It has an output rating of 10 Amps resistive at 120 VAC and a contact life of 250,000 operations. The timer provides a clutch burden of 10.5 VA and a repeat accuracy of plus or minus 0.15 seconds.
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Product Description:
The HP50A619 is an electromechanical interval timer manufactured by Danaher for the Timers and Controllers series. Designed for repetitive sequencing in industrial automation, the unit closes or opens circuit contacts after a preset delay so that conveyors, ovens, and assembly fixtures receive accurately timed power. Its function is achieved through a synchronous motor, a magnetic clutch, and a cam-driven contact set, giving machine builders a compact control element that mounts alongside relays and starters on a panel.
The control circuit is energized at 120 VAC and operates at a line frequency of 60 Hz, eliminating the need for a separate power transformer in most North American panels. Momentary energization can draw up to 10 A of inrush current, so upstream contacts must tolerate that surge before the motor settles to its running load. Operators can select delays up to 30 seconds, with coarse settings made on the front dial and 0.5-second graduations assisting with fine adjustments. The shortest selectable interval is one second, and each cycle repeats with a tolerance of ±0.15 seconds, so batch durations remain consistent. The mechanism pulls in 28 ms after power is applied and drops out 17 ms after the supply is removed, keeping its response fast enough for most clutch or solenoid sequences. A dedicated reset path restores the drive train in 0.5 seconds, and fifteen numbered screw terminals simplify the wiring of control, power, and interlock contacts.
No pilot light is fitted, but the electrical burden is modest. The clutch absorbs 10.5 VA during engagement, while the drive motor adds only 2.45 VA during operation. The output contacts support a 10 A resistive load at 120 VAC, aligning with standard branch-circuit protection. Mechanical endurance reaches 250,000 operations, providing production equipment with a long maintenance interval. The timer can directly switch compatible heater, lamp, or small-motor circuits without requiring auxiliary relays. Its quick pull-in, drop-out, and reset times support repetitive processes that require consistent contact transitions between successive operating cycles.
