Name: TRB Series - Delay On Break Timer
Brand: Littelfuse Inc.

TRB Series - Delay On Break Timer

Series: TRB

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Disclaimer Notice

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 TRB Series combines an isolated, 10A electromechanical relay output with analog timing circuitry. False trigger of the TRB by a transient is unlikely because of the complete isolation of the circuit from the line prior to initiation. The initiate contact is common to one side of the line and may be utilized to operate other loads. Installation is easy due to the TRB’s industry standard 8- or 11-pin plug-in base wiring.

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 (trailing edge triggered). 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 Range	Dimensions

TRB120A2Y30	120 V ac	Isolated SPDT	-30° to 85°C (-22° to 185°F)	1 - 30 s onboard adjustable	3.6 H x 2.39 W in. (91.6 x 60.7 mm)
TRB120A3X600	120 V ac	Isolated SPDT	-30° to 85°C (-22° to 185°F)	7 - 600 s lock shaft adjustable	3.6 H x 2.39 W in. (91.6 x 60.7 mm)
TRB120A4Y120	120 V ac	Isolated DPDT	-30° to 85°C (-22° to 185°F)	2 - 120 s onboard adjustable	3.6 H x 2.39 W in. (91.6 x 60.7 mm)
TRB24D10Y10	24VDC / 28VDC	Isolated DPDT	-30° to 85°C (-22°F to 185°F)	10s fixed	3.62 x 2.39 x 1.78 in. (91.6 x 60.7 x 45.2mm)