ATC Automatic Timing & Controls 339B Series Adjustable Time Delay Relay Timer

ATC 339B Series*

The Automatic Timing & Controls 339B is an economical solid-state Time Delay Relay (TDR) with an octal plug-in base. The 339B maintains excellent repeat accuracy despite wide voltage and temperature variations. even after long periods of down-time. Two models are available. Each has six dial selected ranges from fractions of a second to as long as 10 hours. Each model has a selectable on-delay or interval timing mode.

In addition to the short ranges expected of an electronic TDR, the 339B is also available with ranges as long as 10 hours. An unusually versatile timer, the 339B has six dial-selected ranges from 0.3 sec to 3 hours or 1 sec to 10 hours and provides dial-adjustable timing periods between 0.075 seconds and 10 hours. A single 339B model thus accommodates the needs of a wide range of applications, allowing the user to select easily and precisely an appropriate range to permit optimum setting accuracy. The dial face automatically displays the selected range.


  • Wide choice of ranges
  • Cycle Progress Indication
  • High Accuracy
  • Multiple Timing Modes
More Information
Display Analog Dial
Features Non-resettable
Manufacturer Automatic Timing & Controls
Power ACV, DCV
Range .3 Hr, .3 Min, .3 Sec, 1 Hr, 1 Min, 1 Sec, 10 Hr, 10 Min, 10 Sec, 3 Hr, 3 Min, 3 Sec
Type Timers
Additional Skus 339B-200-Q-2-X, 339B-200-R-2-X, 339B-200-T-2-X, 339B-200-E-2-X, 339B-359-Q-2-X, 339B-359-R-2-X, 339B-359-T-2-X, 339B-359-E-2-X
Additional Details

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

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