HRDB Series - Delay On Break Timer

Series: HRDB
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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.

Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)		Output
Form		Storage Temperature (F/C)Time Delay RangeDimensionsStockSamplesCompare
HRDB1110M12 V dcIsolated SPDT-40° to 85°C (-40° to 185°F)10 m fixed3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB115SCheckOrder
HRDB117S12 V dcIsolated SPDT-40° to 85°C (-40° to 185°F)7 s fixed3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB12012 V dcIsolated SPDT-40° to 85°C (-40° to 185°F)0.1 - 10 s onboard knob3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB12112 V dcIsolated SPDT-40° to 85°C (-40° to 185°F)1 - 100 s onboard knob3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB12412 V dcIsolated SPDT-40° to 85°C (-40° to 185°F)1 - 100 m onboard knob3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB21A65M24 V acIsolated SPDT-40° to 85°C (-40° to 185°F)65 m fixed3 H x 2 W in. (76.7 x 51.3 mm)Check
HRDB22324 V acIsolated SPDT-40° to 85°C (-40° to 185°F)0.1 - 10 m onboard knob3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB32124 V dcIsolated SPDT-40° to 85°C (-40° to 185°F)1 - 100 s onboard knob3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB32424 V dcIsolated SPDT-40° to 85°C (-40° to 185°F)1 - 100 m onboard knob3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB423120 V acIsolated SPDT-40° to 85°C (-40° to 185°F)0.1 - 10 m onboard knob3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
HRDB623230 V acIsolated SPDT-40° to 85°C (-40° to 185°F)0.1 - 10 m onboard knob3 H x 2 W in. (76.7 x 51.3 mm)CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
HRDB117S DELAY ON BREAK TIMER RoHS No 02/22/2021 PbFree No 02/22/2021 CoC_RoHS9_HRDB117S Yes
02/22/2021
HRDB623 DELAY ON BREAK TIMER RoHS No 01/23/2018 PbFree No 01/23/2018 CoC_RoHS9_HRDB623 REACH174_Declaration_HRDB623 Yes
01/23/2018		 Does not Contain
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