ATC Automatic Timing & Controls 425A Series 1/16 DIN Delayed Relay Timer

425A Series*

The Automatic Timing & Controls 425A is set digitally by rotating each setting knob until the desired time preset is displayed by the number wheels on the front of the timer. The digital setting allows exact, accurate and repeatable timing cycles. The 425A utilizes a crystal controlled oscillator which provides 0.1% timing accuracy across all rated voltages and temperatures. The 425A offers the industry’s brightest green LED display in a 1/16 DIN package. Depending on the model, the three-digit LED display will time UP to or DOWN from the time preset.

The 1/16 DIN (48 mm) housing is compact, allowing the 425A to be panel mounted or plug-in using an 8-pin octal socket. The decimal point and sec/min/hrs switches are located on the side of the unit. When panel mounted, these range switches are not accessible to the operator. This tamper-proof feature prevents unauthorized or hazardous changes to the timing range. The 425A can also be ordered as standard with an EEPROM memory. This allows the 425A to retain the elapse time or time remaining during momentary or sustained power interruptions.


  • Easy-To-Read High Intensity Green LED Display
  • Timing From .01 Sec. to 999 Hrs in One Unit
  • Switch Selectable Timing Ranges Are Tamper Proof When Panel Mounted
  • Timing LED Indicates Output Relay Status
  • Time Preset Can Be Adjusted While Timing
  • EEPROM memory Option Standard Feature
  • Passes NEMA Showering Arc Noise Test
  • Panel Mounting or 8-pin Octal Plug-in mounting
  • Timing Up to or Down From the Set Point
More Information
Display 3-Digit LED
Features Non-resettable
Manufacturer Automatic Timing & Controls
Power ACV
Range 10 Hr, 10 Min, 10 Sec, 100 Hr, 100 Min, 100 Sec, 999 Hr, 999 Min, 999 Sec
Type Timers
Additional Skus 425A-300-G-10-M-D, 425A-300-G-10-M-X, 425A-300-G-10-X-D, 425A-300-G-10-X-X, 425A-300-G-20-M-D, 425A-300-G-20-M-X, 425A-300-G-20-X-D, 425A-300-G-20-X-X, 425A-300-Q-10-M-D, 425A-300-Q-10-M-X, 425A-300-Q-10-X-D, 425A-300-Q-10-X-X, 425A-300-Q-20-M-D, 425A-300
Additional Details

*Pricing & appearance may vary based on configuration!* Please configure product above.

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