Littelfuse delivers vital products to address customer needs for protection and safe control of electrical power in industrial applications. The Single Function and Control Relays product portfolio includes four multifunction, time-delay relays designed to control the flow of electrical power. The knob- or switch-adjustable, multifunction series — ASQU/ASTU, DSQUA, TRDU, and TRU — offer the option of choosing among a variety of functions, voltages, and time-delay ranges. The versatile TRDU series features 21 selectable single and dual functions. Littelfuse has the perfect timer to fit your needs.

 

Features

• Knob- and switch-adjustable versions
• Single and dual functionality
• Microcontroller-based circuitry

 

Benifits

• Repeat accuracy
• Fine-tune time-delay settings based on application needs
• Broad time ranges to satisfy most requirements

Model	Image	Description
ASQU ASTU Series		The ASQU and ASTU Series of 17.5 mm, knob adjustable, universal solid-state timers offer multiple functions, voltages, and time delay ranges. Choose one of 5 functions and 4 time delay ranges via 4 selection switches located on face of the unit. Adjustment through the time range is accomplished by an onboard knob.
DSQUA Series		The DSQU and DSTU Series of 17.5 mm, switch adjustable, universal solid-state timers offer multiple functions, voltages, and time delay ranges. Choose one of 5 functions and 4 time delay ranges via 4 selection switches located on face of the unit. Six switches adjust the time delay through the selected range.
TRDU Series		The TRDU Series is a versatile universal time delay relay with 21 selectable single and dual functions. The dual functions replace up to three timers required to accomplish the same function. Both the function and the timing range are selectable with switches located on the face of the unit.
TRU Series		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.