TSB Series - Delay On Break Timer

Littelfuse Time Delay Relays
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The TSB Series is a totally solid-state, delay-on-break timing module. The TSB is available with a fixed, external, or onboard adjustable time delay. Time Delays from 0.05 to 600 seconds, in 4 standard ranges, cover over 90% of all OEM and commercial appliance timing applications. The repeat accuracy is ±2%. Operating voltages of 24, 120, or 230VAC are available. The TSB’s 1A steady state, 10A rated, solid-state output is perfect for direct control of solenoids, contactors, relays, lamps, buzzers, and small heaters. The TSB can be surface mounted with a single screw, or snapped on a 35 mm DIN rail using the P1023-20 adaptor.


Operation (Delay-on-Break)
Input voltage must be applied before and during timing. Upon closure of the initiate switch, the output energizes. The time delay begins when the initiate switch opens. 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 output and the time delay.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Storage Temperature (F/C)Time Delay RangeSample capableCompare
TSB219024VAC-40° to 85°C (-40°F to 185°F)90s fixedNo
TSB22224VAC-40° to 85°C (-40°F to 185°F)0.5 - 60s externally adjustableNo
TSB41300120VAC-40° to 85°C (-40°F to 185°F)300s fixedNo
TSB422120VAC-40° to 85°C (-40°F to 185°F)0.5 - 60s externally adjustableNo
TSB434120VAC-40° to 85°C (-40°F to 185°F)5 - 600s onboard adjustableNo
TSB632230VAC-40° to 85°C (-40°F to 185°F)0.5 - 60s onboard adjustableNo
TSB634230VAC-40° to 85°C (-40°F to 185°F)5 - 600s onboard adjustableNo