303-H
The Model 303 On Delay/Interval Timer provides essential control for industrial applications. Its dual functionality, encompassing both on-delay and interval timing modes, offers operational flexibility for diverse system requirements. Users can select from various timing ranges, extending up to 900 seconds, to precisely meet specific process requirements. The device features DPDT contacts with a 10A at 240VAC resistive rating, ensuring reliable switching performance in critical circuits. Certified by UL and CSA, it meets stringent safety and performance standards, providing assurance in regulated environments. Designed for durability, the timer operates effectively across a broad temperature range of -20° to +140° F, accommodating varied environmental conditions. Its robust construction, coupled with a 5-year unconditional warranty, underscores its long-term operational value in demanding industrial settings. This timer is a dependable component for precise sequence control and system automation.
The Model 303 can operate in 2 different timing modes: In the On Delay
Mode: When power is applied to the coil, the timer will delay for the
preset time before energizing the relay. The relay will remain energized
as long as power is applied. Power must be removed to reset the timer.
In the Interval Mode: When power is applied to the coil, the relay will
energize immediately and remain energized for the preset time period. At
the end of the time period, the relay will de-energize and remain
de-energized until power is removed from the coil. Removing and
re-applying power will restart the timer, energizing the relay. An SG
version of this model is available using silver with gold flash
contacts. The Model 303 is UL Recognized and CSA Certified.
Out of stock
Specifications
| Function Modes | On Delay, Interval |
|---|---|
| Warranty | 5-Year Unconditional Warranty |
| Certifications | UL Recognized and CSA Certified |
| Config: Voltage | L = 10-28V AC/DC; H = 40-260V AC/DC |
| Config: Timing Ranges | 1-10 seconds, 1-30 seconds, 1-60 seconds, 1-100 seconds, 1-200 seconds, 1-300 seconds, 1-600 seconds, 1-900 seconds |
| Accuracy | ±5% |
| Repeatability | ±2% |
| Response time | 100ms |
| Contacts | DPDT |
| Contact rating | 10A at 240VAC resistive |
| Expected relay life (Mechanical) | 10 million operations |
| Expected relay life (Electrical) | 100,000 operations at rated load |
| Operating temperature | -20° to +140° F |
| Humidity tolerance | 0-97% without condensation |
| Transient protection | 775V, 80 Joules |
| Case material | NORYL Plastic |
| Mounting | 8-pin socket (not included) |
| Config: Additional Options | /C = Custom (Voltage and/or Timing); /SG = Silver with Gold Flash Contacts |
| Input Power | 3 Watts Max |
| Output (Resistive) | 240V AC, 10A |
| Output (General Use) | 120V AC, 4A; 240V AC, 2A |
| Output (Pilot Duty) | C300 |
| Pilot Duty (120V) | Make 15A, Break 1.5A |
| Pilot Duty (240V) | Make 7.5A, Break 0.75A |
| Dimension Tolerance | ± 0.06 |
| Config: Function Selection | INTERVAL: SWITCH 1 ON; ON DELAY: SWITCH 1 OFF |
| Config: Timing Range Selection | See PROGRAMMING table for SWITCH 2, 3, and 4 settings for each timing range. |