KRDB Series

KRDB421

The KRDB Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its microcontroller timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock,

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  • Product Literature
    • Electrical Characteristics
      • Catalog # KRDB421
      • Input Voltage (V) 120 V ac
      • Input Tolerance (%) -20% - 10%
      • Input AC Line Frequency (Hz) 50/60
      • Output Type Isolated relay contacts
      • Output Form SPDT
      • Output Load Rating (VA) 10 A resistive @ 125 V ac; 5 A resistive @ 230 V ac and 28 V dc; 1/4 hp @ 125 V ac
      • Time Delay Type Microcontroller with watchdog circuitry
      • Time Delay Range 1 - 100 s onboard adjustable
      • Time Delay Tolerance (%) ±5%
      • Reset Time (ms) ≤150
      • Initiate Time (ms) ≤40
      • Repeat Accuracy (%) ±0.5% or 20 ms whichever is greater
      • Setpoint vs Ambient Temperature and Operating Voltage (%) ≤±5%
      • Switching Voltage Maximum (V) 250
      • Insulation Resistance ≥100
      • Isolation voltage ≥1500 Vrms input to output
      • Circuitry Encapsulated
      • Life Electrical: 1 x 10⁵; Mechanical: 1 x 10⁷
      • Power Consumption ≤2 VA
      • Termination Type 0.25 in. (6.35 mm) male quick connect terminals
      • Mounting Method Surface mount with 1 #10 (M5 x 0.8) screw
      • Operating Temperature -40° to 60°C (-40° to 140°F)
      • Storage Temperature (F/C) -40° to 85°C (-40° to 185°F)
      • Humidity 95% relative : non-condensing
      • Dimensions 2 H x 2 W in. (50.8 x 50.8 mm)
      • Weight (lbs/g) 0 Kg
      • Dimensions 2 H x 2 W in. (50.8 x 50.8 mm)