HRDR Series - Recycling Timer

Littelfuse Recycle Time Delay Relays
The HRDR Series combines an electromechanical relay and microcontroller timing circuitry. It offers 12 to 230V operation in five ranges and factory fixed, onboard or externally adjustable time delays with a repeat accuracy of ±0.5%. The high switching capacity of the output contacts allow for direct control of heavy loads like compressors, pumps, motors, heaters and lighting. A bypass/reset switch option allows operator to interrupt normal recycling sequence and energize output relay. An excellent choice for OEM applications.


Operation (Recycling with Reset Switch)
Upon application of input voltage, the ON time T1 begins and output relay energizes. At the end of the ON time, the output relay de-energizes and the OFF time T2 begins. At the end of the OFF time, the output relay energizes and the cycle repeats as long as input voltage is applied. Some recycling timers have the OFF time as the first delay.
Reset: Removing input voltage resets output and time delays, and returns sequence to the first delay.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Storage Temperature (F/C)Time Delay RangeSample capableCompare
HRDR121A4R12VDCSPDT non-isolated-40° to 85°C (-40°F to 185°F)ON time first: 10 - 1 000s onboard adjustable; OFF: 1 - 100m onboard adjustableNo
HRDR321A4R24VDCSPDT non-isolated-40° to 85°C (-40°F to 185°F)ON time first: 1 - 100s onboard adjustable; OFF: 1 - 100m onboard adjustableNo
HRDR322B2R24VDCSPDT non-isolated-40° to 85°C (-40°F to 185°F)ON: 10 - 1 000s onboard adjustable; OFF time first: 10 - 1 000s onboard adjustableNo
HRDR330A0R24VDCSPDT non-isolated-40° to 85°C (-40°F to 185°F)ON time first: 0.1 - 10s externally adjustable; OFF: 0.1 - 10s externally adjustableNo
HRDR331A124VDCSPDT non-isolated-40° to 85°C (-40°F to 185°F)ON time first: 0.1 - 10s externally adjustable; OFF: 1 - 100s externally adjustableNo
HRDR411SB30MR120VACSPDT non-isolated-40° to 85°C (-40°F to 185°F)ON: 1s fixed; OFF time first: 30m fixedNo
HRDR431A1R120VACSPDT non-isolated-40° to 85°C (-40°F to 185°F)ON time first: 1 - 100s externally adjustable; OFF: 1 - 100s externally adjustableNo