HRDB Series - Delay On Break Timer

Littelfuse Delay on Break timers
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.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Storage Temperature (F/C)Time Delay RangeSample capableCompare
HRDB1110M12VDCIsolated SPDT-40° to 85°C (-40°F to 185°F)10m fixedNo
HRDB117S12VDCIsolated SPDT-40° to 85°C (-40°F to 185°F)7s fixedNo
HRDB12012VDCIsolated SPDT-40° to 85°C (-40°F to 185°F)0.1s - 10s onboard knobNo
HRDB12112VDCIsolated SPDT-40° to 85°C (-40°F to 185°F)1 - 100s onboard knobNo
HRDB12412VDCIsolated SPDT-40° to 85°C (-40°F to 185°F)1 - 100m onboard knobNo
HRDB21A65M24VACIsolated SPDT-40° to 85°C (-40°F to 185°F)65m fixedNo
HRDB22324VACIsolated SPDT-40° to 85°C (-40°F to 185°F)0.1 - 10m onboard knobNo
HRDB32124VDCIsolated SPDT-40° to 85°C (-40°F to 185°F)1 - 100s onboard knobNo
HRDB32424VDCIsolated SPDT-40° to 85°C (-40°F to 185°F)1 - 100m onboard knobNo
HRDB423120VACIsolated SPDT-40° to 85°C (-40°F to 185°F)0.1 - 10m onboard knobNo
HRDB623230VACIsolated SPDT-40° to 85°C (-40°F to 185°F)0.1 - 10m onboard knobNo