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Interval

Interval Time-Delay Relays
Littelfuse delivers vital products to address customer needs for protecting and safely controlling electrical power. Our single-function & control relays product portfolio includes 16 series of interval time-delay relays with excellent repeat accuracy. These relays apply power to circuits for set periods of time. Available features include microcontroller-based circuitry, solid-state components, encapsulation, and LED indicators.
  • Ac input voltages from 24 V ac to 240 V ac
  • Dc input voltages from 12 V dc to 120 V dc
  • Fixed or selectable time delays from 600 ms to 10 hr
  • Repeat accuracy as high as ±0.1 % or 20 ms, whichever is greater
  • Operate at temperatures up to +85 °C
  • Reset times ≤ 400 ms
  • Initiate times ≤ 20 ms
  • Time delays vs. temp. & voltage ≤ ±2 %
  • Ac line frequency/Dc ripple of 50/60 Hz
  • UL Recognized
  • Available with DPDT output circuitry, SPDT output circuitry, or normally open contacts
  • Available with digital or microcontroller-based circuitry
  • Compact, low-weight designs

Interval Parts

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Interval Applications

Highlights Section

  • Compressors
  • Heater elements
  • Motor drives
  • Motor starters
  • Pumps

Interval Resources