Electrical Littelfuse Time Delays | Spdt 0.1 To 10 Min. Delay On Break Time Delay (24V)

The Hrdb Series Combines An Electromechanical, Relay Output With Microcontroller Timing Circuitry. The Hrdb Offers 12 To 230V Operation In Five Options And Factory Fixed, External, Or Onboard Adjustable Time Delays With A Repeat Accuracy Of ±0.5%. The Isolated Output Contact Rating Allows For Direct Operation Of Heavy Loads, Such As Compressors, Pumps, Blower Motors, Heaters, Etc. The Hrdb Is Ideal For Oem Applications Where Cost Is A Factor.

Operation (Delay-On-Break)

Input Voltage Must Be Applied Before And During Timing. Upon Closure Of The Initiate Switch, The Output Relay Energizes. The Time Delay Begins When The Initiate Switch Is Opened. The Output Remains Energized During Timing. At The End Of The Time Delay, The Output De-Energizes. The Output Will Energize If The Initiate Switch Is Closed When Input Voltage Is Applied.
Reset: Reclosing The Initiate Switch During Timing Resets The Time Delay. Loss Of Input Voltage Resets The Time Delay And Output.

Specifications:
• Input Voltage (V): 24Vac
• Input Tolerance (%): -20% – 10%
• Input Ac Line Frequency (Hz): 50/60Hz
• Output Type: Electromechanical Relay
• Output Form: Isolated Spdt
• Output Load Rating (Va): General Purpose: Spdt-No: 125/240Vac30A; Spdt-Nc 15A; Resistive: Spdt-No 30A For 125/240Vac 20A For 28Vdc; Spdt-Nc 15A For 125/240Vac 10A For 28Vdc; Motor Load: Spdt-No 1 Hp For 125Vac 2Hp For 240Vac; Spdt-Nc 1/4Hp For 125Vac 1Hp For 240Vac
• Time Delay Type: Microcontroller Circuitry
• Time Delay Range: 0.1 – 10M Onboard Knob
• Time Delay Tolerance (%): 5%
• Reset Time (Ms): 150Ms
• Initiate Time (Ms): 20Ms
• Repeat Accuracy (%): 0.5% Or 20Ms Whichever Is Greater
• Setpoint Vs Ambient Temperature And Operating Voltage (%): 2%
• Surge Protection: Ieee C62.41-1991 Level A
• Insulation Resistance: 100 M
• Dielectric Breakdown: 2000V Rms Terminals To Mounting Surface
• Circuitry: Encapsulated
• Life: Mechanical – 1 X 106; Electrical – 1 X 105 3 X 104 For 1Hp 6 000 For 1/4Hp 1Hp And 2Hp
• Power Consumption: 4Va
• Termination Type: 0.25 In. (6.35Mm) Male Quick Connect Terminals
• Mounting Method: Surface Mount With One #10 (M5 X 0.8) Screw
• Operating Temperature: -40° To 60°C (-40°F To 140°F)
• Storage Temperature (F/C): -40° To 85°C (-40°F To 185°F)
• Humidity: 95% Relative Non-Condensing
• Dimensions: 3.00 X 2.00 X 1.50 In. (76.7 X 51.3 X 38.1Mm)