TRU3 - TRU Series

Series: TRU
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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 TRU Series is a multifunction, knob adjustable, Universal Time Delay Relay. It includes six of the most popular timing functions selected by a slide switch. The time delay is knob adjustable and the time delay range is switch selectable. The repeat accuracy is + 0.1%. Both function and time range can be selected on the top face of the unit. In addition to multifunctioning and multiple time ranges, the TRU Series features universal input voltage; 19 to 264VAC and 19 to 30VDC and full 10A output relay. The TRU Series can directly replace up to 1000 competitive time delay relay models.

A six position slide switch selects delay-on-make, interval, single shot, recycling (ON time first, Equal Recycle Delays), delay-on-break, and retriggerable single shot. 8-pin DPDT base wiring is limited to delay-on-make, interval, and recycling functions. All six functions are available in the 8-pin SPDT and 11-pin DPDT versions.

Property (Mouseover for details) Value
Input Voltage (V) 19 or 264 V ac; 19 or 30 V dc
Input AC Line Frequency (Hz) 50/60
Output Type Electromechanical relay
Output Form Isolated DPDT
Output Load Rating (VA) 10 A resistive @ 120/240 V ac and 28 V dc; 1/3 hp @ 120/240 V ac
Time Delay Type Digital
Time Delay Range 0.1 s - 1000 m in 6 ranges: 0.1 - 10 – 1 - 100 or 10 - 1000 s; 0.1 - 10 – 1 - 100 or 1000 m
Reset Time (ms) ≤300
Adjustment Type Multiplier: 4 position DIP switch selects x0.1-x1-x10 or x100 and s or m; Time setting: onboard knob adjustment with 1 - 100 reference dial
Repeat Accuracy (%) ±0.1% or 20 ms whichever is greater
Setpoint vs Ambient Temperature and Operating Voltage (%) ±2%
Indication Two LEDs indicate: 1) input voltage applied; 2) output relay status
Polarity DC units are reverse polarity protected
Life Electrical: 1 x 10⁶; Mechanical: 1 x 10⁷
Termination Type Magnal 11-pin plug-in
Mounting Method Plug-in socket
Operating Temperature -20° to 65°C (-4° to 149°F)
Storage Temperature (F/C) -40° to 85°C (-40° to 185°F)
Dimensions 3.44 H x 2.39 W in. (87.3 x 60.7 mm)
Weight (lbs/g) 0 Kg
Dimensions 3.44 H x 2.39 W in. (87.3 x 60.7 mm)
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